Elements of a set are the objects or items present in a set that can be any number, name, or object. A set is represented by a capital letter with the elements listed in a curly bracket. Set Theory Symbols are the symbols used during operations on sets.Set is a collection of different elements.It could be numbers, alphabets, etc. Various symbols are used to denote them (like ℝ denote set of Real Numbers) and their relationship and operation (subset, union, etc).Create a Set in Python. In Python, we create sets by placing all the elements inside curly braces {}, separated by comma.. A set can have any number of items and they may be of different types (integer, float, tuple, string etc.).Free Set Theory calculator - calculate set theory logical expressions step by stepList of Mathematical Symbols R = real numbers, Z = integers, N=natural numbers, Q = rational numbers, P = irrational numbers. ˆ= proper subset (not the whole thing) =subset 9= there exists 8= for every 2= element of S = union (or) T = intersection (and) s.t.= such that =)implies ()if and only if P = sum n= set minus )= therefore 1It could contain people. It could contain other sets. It could contain cars. It could contain farm animals. But the numbers will be easy to deal with just because-- well, they're numbers. So let's say I have a set X, and it has the distinct objects in it, the number 3, the number 12, the number 5, and the number 13. That right there is a set. A set is a collection of things called elements. For example {1,2,3,8} would be a set consisting of the elements 1,2,3, and 8. To indicate that 3 is an element of {1,2,3,8}, it is customary to …Each publicly traded company that is listed on a stock exchange has a “ticker symbol” to identify it. These stock-symbol abbreviations consist mainly of letters, though in some cases may include a number or a hyphen. When a stock price quot...Real numbers are simply the combination of rational and irrational numbers, in the number system. In general, all the arithmetic operations can be performed on these numbers and they can be represented in the number line, also. At the same time, the imaginary numbers are the un-real numbers, which cannot be expressed in the number line and are …3. The standard way is to use the package amsfonts and then \mathbb {R} to produce the desired symbol. Many people who use the symbol frequently will make a macro, for example. \newcommand {\R} {\mathbb {R}} Then the symbol can be produced in math mode using \R. Note also, the proper spacing for functions is achieved using \colon …Set Y = {Number of Animals in India} is an infinite set, as there is an approximate number of Animals in India, ... Set of all elements, which are common to all the given sets, gives intersection of sets. It is denoted by the symbol ⋂. For example, set X = {2, 3, 7} and set Y = {2, 4, 9} So, X ⋂ Y = {2}Apr 9, 2022 · First, let A be the set of the number of windows that represents "fewer than 6 windows". This set includes all the numbers from 0 through 5: \[A=\left\{0,1,2,3,4,5\right\} onumber \] Next, let B be the set of the number of windows that represents "has a dozen windows". This is just the set that contains the single number 12: If all elements of two or more sets are equal and the number of elements is also equal, then the sets are said to be equal sets. The symbol used to denote equal sets is '=', i.e., if sets A and B are equal, then it is written A = B. Grade. Foundation. K - 2. 3 - 5. 6 - 8. High. 9 - …Finding the Card Number. A card’s number is usually in the center-right of the card under the illustration. On Pendulum Monster Cards, the card number is in the bottom left corner. Pokémon cards have been printed in English since 1999. Besides the first set (Base Set), every set has an expansion symbol which identifies cards from that set. It could contain people. It could contain other sets. It could contain cars. It could contain farm animals. But the numbers will be easy to deal with just because-- well, they're numbers. So let's say I have a set X, and it has the distinct objects in it, the number 3, the number 12, the number 5, and the number 13. That right there is a set. Each publicly traded company that is listed on a stock exchange has a “ticker symbol” to identify it. These stock-symbol abbreviations consist mainly of letters, though in some cases may include a number or a hyphen. When a stock price quot...4. R = the set of real numbers. 5. C = the set of complex numbers. Is S is one of those sets then we also use the following notations:2 1. S+ = set of positive elements in S, for instance Z+ = {1,2,3,···} = the set of positive integers. 2. S− = set of negative elements in S, for instance Z− = {−1,−2,−3,···} = the set of negative ...ASCII reserves the first 32 code points (numbers 0–31 decimal) and the last one (number 127 decimal) for control characters. ... (1991) character set as the first 128 symbols, so the 7-bit ASCII characters have the same numeric codes in both sets.15 thg 5, 2023 ... This means that x can only be a real number, because it is “in” the set of R. ⊗ - this symbol is used to describe the Kronecker product, which ...Purplemath. You never know when set notation is going to pop up. Usually, you'll see it when you learn about solving inequalities, because for some reason saying "x < 3" isn't good enough, so instead they'll want you to phrase the answer as "the solution set is { x | x is a real number and x < 3 }".How this adds anything to the student's understanding, I don't …All the integers on the right-hand side of 0 represent the natural numbers, thus forming an infinite set of numbers. When 0 is included, these numbers become whole numbers which are also an infinite set of numbers. Set of Natural Numbers. In a set notation, the symbol of natural number is “N” and it is represented as given below. Statement:The symbol \( \cup \) is the union of both sets. That is, the set of real numbers is the set comprised of joining the set of rational numbers with the set of irrational numbers. The Complex Numbers: \( \mathbb{C} = \{ a + b i \mid a, b \in \mathbb{R} \text { and } ... The best way to proceed here is to graph the set of numbers on the number …Common Number Sets; Closure; Real Number Properties . A ⊂ B. Set Symbols . Power Set; Power Set Maker . Functions. What is a Function? Common Functions; Function ... Symbols can be loaded automatically using the .symfix (Set Symbol Store Path) command, as long as you have access to the internet while your debugger is running. Then use the .reload (Reload Module) command to load the symbols. If you are performing user-mode debugging, you will need symbols for your target application.Numeral system, any of various sets of symbols and the rules for using them to represent numbers, which are used to express how many objects are in a given set. Thus, the idea of “oneness” can be represented by the Roman numeral I, by the Greek letter alpha α (the first letter) used as a numeral,Set symbols are used to define the elements of a given set. The following table shows the set theory symbols and their meaning. Symbols Meaning { } Symbol of set: U: Universal set: n(X) Cardinal number of set X: ...First, let A be the set of the number of windows that represents "fewer than 6 windows". This set includes all the numbers from 0 through 5: \[A=\left\{0,1,2,3,4,5\right\} onumber \] Next, let B be the set of the number of windows that represents "has a dozen windows". This is just the set that contains the single number 12:Free Set Theory calculator - calculate set theory logical expressions step by step The set of complex numbers is represented by the Latin capital letter C. The symbol is often presented with a double-struck font face just as with other number sets. The set of complex numbers extends the real numbers.Mathematical and scientific symbols · Symbols · Examples · Greek alphabet · Roman alphabet · Fractions · Decimal Fractions · SI Units: Prefixes · Cardinal Numbers ...The symbol for the set of all rational numbers is (meaning “quotient” – the outcome of the division). Irrational numbers are numbers that cannot be expressed as repeating, terminating decimals or as a ratio of two integers. Two special examples of irrational numbers are numbers 𝚎 and 𝛑 . The need for understanding and considering …Hello and welcome to Quick Maths Revision!In this video I will be covering how to create hollow letters (the number sets) in LaTeX. In this quick and easy La...Type of Number. It is also normal to show what type of number x is, like this:. The means "a member of" (or simply "in"); The is the special symbol for Real Numbers.; So it says: "the set of all x's that are a member of the Real Numbers, such that x is greater than or equal to 3" In other words "all Real Numbers from 3 upwards". There are other ways we could …The most common way to organize Pokemon cards is by set. To identify the set, look for a little symbol at the bottom of the card, next to the card number. There are a bunch of these set symbols… 5-6 sets are released every year, each with a different set symbol, and they’ve been printing cards since 1999!The above is pronounced as "the set of all x, such that x is an element of the natural numbers and x is less than 10". The vertical bar is usually pronounced as "such that", and it comes between the name of the variable you're using to stand for the elements and the rule that tells you what those elements actually are.What do the different numbers inside a recycling symbol on a plastic container mean? HowStuffWorks investigates. Advertisement Plastics aren't so great for the environment or our health. Unfortunately, a lot of consumer goods are enclosed i...The latter two symbols were introduced by the Bourbaki group (specifically André Weil) in 1939, inspired by the letter Ø in the Danish and Norwegian alphabets. In the past, "0" was occasionally used as a symbol for the empty set, but this is now considered to be an improper use of notation. The symbol ∅ is available at Unicode point U+2205.Mathematical Operators and Supplemental Mathematical Operators. List of mathematical symbols. Miscellaneous Math Symbols: A, B, Technical. Arrow (symbol) and Miscellaneous Symbols and Arrows and arrow symbols. ISO 31-11 (Mathematical signs and symbols for use in physical sciences and technology) Number Forms. Geometric Shapes. Basic Set Theory. Sets are well-determined collections that are completely characterized by their elements. Thus, two sets are equal if and only if they have exactly the same elements. The basic relation in set theory is that of elementhood, or membership. We write \ (a\in A\) to indicate that the object \ (a\) is an element, or a member, of ...Set notations are the basic symbols used to denote the various representations across set operations. Set notation is used to denote any working within and across the sets. All the symbols except the number elements can be easily considered as the notations for sets. natural numbers / whole numbers set (with zero) N 0 = {0, 1, 2, 3, 4,…} 0 ∈ N 0: Q: rational ... We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Legal . Accessibility Statement For more information contact us at [email protected] .Betty P Kaiser is an artist whose works have captivated art enthusiasts around the world. Her unique style and attention to detail make her art truly remarkable. However, what sets her apart is the symbolism and meaning behind each of her a...Set Builder Notation Symbols. The different symbols used to represent set builder notation are as follows: The symbol ∈ “is an element of”. The symbol ∉ “is not an element of”. The symbol W denotes the whole number. The symbol Z denotes integers. The symbol N denotes all natural numbers or all positive integers.Beginning Algebra Tutorial 2. Beginning Algebra Tutorial 2: Symbols and Sets of Numbers ... numbers or irrational numbers would be considered a real number. That ...I couldn't find that in a vast of Mathjax help documents,and the only one I found doesn't work: \Natural or \mathds {N} \Bbb {N} gives N N here. But at least the TeX …Finding the Card Number. A card’s number is usually in the center-right of the card under the illustration. On Pendulum Monster Cards, the card number is in the bottom left corner. Pokémon cards have been printed in English since 1999. Besides the first set (Base Set), every set has an expansion symbol which identifies cards from that set.Finding the Card Number. A card’s number is usually in the center-right of the card under the illustration. On Pendulum Monster Cards, the card number is in the bottom left corner. Pokémon cards have been printed in English since 1999. Besides the first set (Base Set), every set has an expansion symbol which identifies cards from that set.Sets. Symbol, Code. complex function, <s:complex>. ∋, <s:contains>. ∈, <s:element>. ℤ, <s:integers>. ∩, <s:intersect>. ⋁, <s:nary_or>. ⋃, <s:nary_union>.This is the set of natural numbers, plus zero, i.e., {0, 1, 2, 3, 4, 5 ... number symbols (also called numerals or digits) plus the symbols ".", "+ ...Set notation –. In set theory and its applications to logic, mathematics, and computer science, set-builder notation is a mathematical notation for describing a set by enumerating its elements or stating the properties that its members must satisfy. For example, empty set is represented as . So Let’s see the latex code of Set Notations one ...Unicode characters table. Unicode character symbols table with escape sequences & HTML codes. Mouse click on character to get code: u0001. u0002. u0003. u0004. u0005.SYMBOL LATEX; 1. empty set \varnothing: 2. set of natural numbers \mathbb{N} 3. set of integers \mathbb{Z} 4. set of rational numbers \mathbb{Q} 5. set of algebraic numbers \mathbb{A} 6. set of real numbers \mathbb{R} 7. set of complex numbers \mathbb{C} 8. is member of]\in: 9. is not member of \notin: 10. owns (has …Various kinds of sets are studied in this chapter, which are mentioned below: A singleton set is a set that only contains one element. Finite sets: A finite set is a collection of elements with a fixed number of elements. Infinite sets: The term "infinite set" refers to a set that is not finite. Equal and equivalent sets: The two sets A and B are said to be …To create a Venn diagram, first we draw a rectangle and label the universal set “ U = Plants. ” Then we draw a circle within the universal set and label it with the word “Trees.”. Figure 1.7. This section will introduce how to interpret and construct Venn diagrams. In future sections, as we expand our knowledge of relationships between ...Here is a list of commonly used mathematical symbols with names and meanings. Also, an example is provided to understand the usage of mathematical symbols. x ≤ y, means, y = x or y > x, but not vice-versa. a ≥ b, means, a = b or a > b, but vice-versa does not hold true. . 2 thg 4, 2020 ... ... number. Definition: Subset. Set A is a subset of Set B if and only if every element in Set A is also in Set B. In symbols: A⊂B⟺x∈A→x∈B ...All the integers on the right-hand side of 0 represent the natural numbers, thus forming an infinite set of numbers. When 0 is included, these numbers become whole numbers which are also an infinite set of numbers. Set of Natural Numbers. In a set notation, the symbol of natural number is “N” and it is represented as given below. Statement:Set theory symbols: In Maths, the Set theory is a mathematical theory, developed to explain collections of objects. Basically, the definition states that “it is a collection of elements”. These elements could be numbers, alphabets, variables, etc.The set of all real numbers is the universal set in the context of sets of rational numbers, irrational numbers, integers, whole numbers, natural numbers, etc. In a particular context: Universal set is the superset of all sets. All sets are subsets of universal set. Universal Set Definition. ... Symbol of Universal Set. The universal set is represented by the …HTML and XML provide ways to reference Unicode characters when the characters themselves either cannot or should not be used. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name.. A numeric character reference …For example, set A = {3,4,5,6,7} is a finite set, as it has a finite number of elements. Set C = {number of cows in India} is an infinite set, there is an approximate number of cows in India, but the actual number of cows cannot be expressed, as the numbers could be very large and counting all cows is not possible. 4. Equal SetsThe trading card game Magic: The Gathering has released a large number of sets since it was first published by Wizards of the Coast. After the 1993 release of Limited Edition, also known as Alpha and Beta, roughly 3-4 major sets have been released per year, in addition to various spin-off products. Magic has made three types of sets since Alpha ...... sets of numbers. Some of the different notations used in sets are ... (vii) The symbol '∉' stands for 'does not belongs to' also for 'is not an element of ...Set notation is used to define the elements and properties of sets using symbols. Symbols save you space when writing and describing sets. Symbols save you space when writing and describing sets. Set notation also helps us to describe different relationships between two or more sets using symbols. Definitions: Natural Numbers - Common counting numbers. Prime Number - A natural number greater than 1 which has only 1 and itself as factors. Composite Number - A natural number greater than 1 which has more factors than 1 and itself. Whole Numbers - The set of Natural Numbers with the number 0 adjoined. Integers - Whole Numbers with their ...Numeral system, any of various sets of symbols and the rules for using them to represent numbers, which are used to express how many objects are in a given set. Thus, the idea of “oneness” can be represented by the Roman numeral I, by the Greek letter alpha α (the first letter) used as a numeral,Mathematical Operators and Supplemental Mathematical Operators. List of mathematical symbols. Miscellaneous Math Symbols: A, B, Technical. Arrow (symbol) and Miscellaneous Symbols and Arrows and arrow symbols. ISO 31-11 (Mathematical signs and symbols for use in physical sciences and technology) Number Forms. Geometric Shapes. Common Number Sets; Closure; Real Number Properties . A ⊂ B. Set Symbols . Power Set; Power Set Maker . Functions. What is a Function? Common Functions; Function ...This symbol is used to represent the empty set (or the null set). The empty set is unique and it is the set containing zero elements. ... Since the cardinality of a set is the number of elements ...How to write number sets R Z Q N with Latex ? In old books, classic mathematical number sets are marked in bold as follows $\mathbfR$ is the set of (...) Home; Apache; C++; ... Latex empty set; Latex euro symbol; Latex expected value symbol - expectation; Latex floor function; Latex gradient symbol;SYMBOLS USED IN SET THEORY ; X' = U\X · The difference set set A\B can also be viewed as the compliment of B with respect to A. ; X n Y = ᵩ. It is clear that n(A ...4. In computer science (more precisely, when dealing with algorithms), the set of all primes (or, more accurately, of all representations of primes as strings in some alphabet), is generally denoted PRIMES or PRIMES, as is usual to denote the language associated with some decision problem. See for example PRIMES is in P.Find the cardinal number of each set. (a) The set A of counting numbers between ten and twenty. (b) The set B of letters in the word “bumblebee.” (c) C = {x|x is an even multiple of 5 that is less than 10}List of Mathematical Symbols R = real numbers, Z = integers, N=natural numbers, Q = rational numbers, P = irrational numbers. ˆ= proper subset (not the whole thing) =subset 9= there exists 8= for every 2= element of S = union (or) T = intersection (and) s.t.= such that =)implies ()if and only if P = sum n= set minus )= therefore 1How to write number sets R Z Q N with Latex ? In old books, classic mathematical number sets are marked in bold as follows $\mathbfR$ is the set of (...) Home; Apache; C++; ... Latex empty set; Latex euro symbol; Latex expected value symbol - expectation; Latex floor function; Latex gradient symbol;3. The standard way is to use the package amsfonts and then \mathbb {R} to produce the desired symbol. Many people who use the symbol frequently will make a macro, for example. ewcommand {\R} {\mathbb {R}} Then the symbol can be produced in math mode using \R. Note also, the proper spacing for functions is achieved using \colon instead of :.the set of rational numbers You have already met the set notation {x: 1 x 3}. This is read as: the set of numbers x such that x lies between 1 and 3. The set notation can also be written as {x: 1 x 3, where x }. This is read as: the set of numbers x such that x lies between 1 and 3 where x is a real number. {x: 1 x 7, where x } A {x: 3 x 5} B ... ... sets of numbers. Some of the different notations used in sets are ... (vii) The symbol '∉' stands for 'does not belongs to' also for 'is not an element of ...If all elements of two or more sets are equal and the number of elements is also equal, then the sets are said to be equal sets. The symbol used to denote equal sets is '=', i.e., if sets A and B are equal, then it is written A = B. Grade. Foundation. K - 2. 3 - 5. 6 - 8. High. 9 - …Number systems. Each number system can be defined as a set. There are several special sets of numbers: natural, integers, real, rational, irrational, and ordinal numbers.These sets are named with standard symbols that are used in maths and other maths-based subjects. For example, mathematicians would recognise Z to define the set of all integers. How to write number sets R Z Q N with Latex ? In old books, classic mathematical number sets are marked in bold as follows $\mathbfR$ is the set of (...) Home; Apache; C++; ... Latex empty set; Latex euro symbol; Latex expected value symbol - expectation; Latex floor function; Latex gradient symbol;Ordering Real Numbers. Equality Symbols. You know what the equal symbol means and looks like. If a = b, then a and b are equal, (8 = 8). To learn about ordering real numbers, think about it this way. If a real number b is greater than a real number a, their relationship would look like this: b > a, and b is to the right of a on the number line Overleaf has a symbol palette for users with premium accounts. Read more here. Note that some of the symbols require loading of the amssymb package, and this information is shown when you hover on the symbol. Contents. …The most common number sets, along with the symbols we use to represent each set, are illustrated in the following image: Let's start with the natural numbers, ...Mar 19, 2010 · These sets are not equal. The set E has one element, which is the number 1; the set F also has one element, but the single element of F is another set, not a number. So, whereas the set E is a box containing the number 1, the set F is a box containing a box containing the number 1. A symbol for the set of real numbers. In mathematics, a real number is a number that can be used to measure a continuous one- dimensional quantity such as a distance, duration or temperature. Here, continuous means that pairs of values can have arbitrarily small differences. Number System is a method of representing Numbers on the Number Line with the help of a set of Symbols and rules. These symbols range from 0-9 and are termed as digits. Number System is used to …Output: {True, 10, 'Geeks', 52.7, 'for'} Time Complexity: O(n) Auxiliary Space: O(n) Python Frozen Sets. Frozen sets in Python are immutable objects that only support methods and operators that produce a result without affecting the frozen set or sets to which they are applied. It can be done with frozenset() method in Python.. While elements of a …
The symbol \( \cup \) is the union of both sets. That is, the set of real numbers is the set comprised of joining the set of rational numbers with the set of irrational numbers. The Complex Numbers: \( \mathbb{C} = \{ a + b i \mid a, b \in \mathbb{R} \text { and } ... The best way to proceed here is to graph the set of numbers on the number …. Joel embiid background
A set is a collection of objects (without repetitions). To describe a set, either list all its elements explicitly, or use a descriptive method. Intervals are sets of real numbers. The elements in a set can be any type of object, including sets. We can even have a set containing dissimilar elements.In this picture you have the symbol for the set of integers, real numbers and complex numbers. I think this must be a package. symbols; Share. Improve this question. Follow edited Oct 30, 2016 at 13:13. cgnieder. 66.3k 7 7 gold badges 173 173 silver badges 379 379 bronze badges. asked Oct 30, 2016 at 9:38. lork251 lork251. 379 2 2 gold …Finding the Card Number. A card’s number is usually in the center-right of the card under the illustration. On Pendulum Monster Cards, the card number is in the bottom left corner. Pokémon cards have been printed in English since 1999. Besides the first set (Base Set), every set has an expansion symbol which identifies cards from that set. The set of integers symbol (ℕ) is used in math to denote the set of natural numbers: 1, 2, 3, etc. The symbol appears as the Latin Capital Letter N symbol presented in a double-struck typeface. Typically, the symbol is used in an expression like this: N = { 1, 2, 3, …} The set of real numbers symbol is a Latin capital R presented in double ...The Power Set of a Set. The symbol 2 is used to describe a relationship between an element of the universal set and a subset of the universal set, and the …The cardinality of a set is a measure of a set's size, meaning the number of elements in the set. For instance, the set A = \ {1,2,4\} A = {1,2,4} has a cardinality of 3 3 for the three elements that are in it. The cardinality of a set is denoted by vertical bars, like absolute value signs; for instance, for a set A A its cardinality is denoted ...Complex Numbers. A combination of a real and an imaginary number in the form a + bi, where a and b are real, and i is imaginary. The values a and b can be zero, so the set of real numbers and the set of imaginary numbers are subsets of the set of complex numbers. Examples: 1 + i, 2 - 6 i, -5.2 i, 4.Number sets such as natural numbers or complex numbers are not provided by default by LaTeX. It doesn’t mean that LaTeX doesn’t know those sets, or more importantly their symbols… There are two packages which provide the same set of symbols. You can choose to load either of them:9.2: Union, Intersection, and Complement. Commonly sets interact. For example, you and a new roommate decide to have a house party, and you both invite your circle of friends. At this party, two sets are being combined, though it might turn out that there are some friends that were in both sets. However, before we talk about multiple sets ...Number sets in the real number system — Krista King Math | Online math help The vast majority of the numbers you’ll use in most math classes are called real numbers, and the whole universe of real numbers is what makes up the Real Number System. Let’s start with a diagram.Set Notation Symbols n(A) Cardinal number of set A Not an element A' Complement of set A Not a subset Element Proper Subset Ø = { } Empty set or Null set Subset A = B Equal sets | Such that n(A) = n(B) Equivalent sets Union Intersection U Universal set ℕ Natural numbersSets - An Introduction. A set is a collection of objects. The objects in a set are called its elements or members. The elements in a set can be any types of objects, including sets! The members of a set do not even have to be of the same type. For example, although it may not have any meaningful application, a set can consist of numbers and names.Sets. A set is an unordered collection of distinct elements. Generally, the elements are of the same type (e.g. real numbers) but a set can be made up of elements of different types. The following notation is commonly used to specify a set: A ={2,3,5,7,9} Note that the elements are enclosed by 'curly braces' {} and separated by commas.And real number symbols are represented in this tutorial using more than one method. Skip to content. Physicsread Learn and Practice LaTeX in depth! Search for: Latex; Physics; Physicsread ... Symbol Real numbers; Type: Set symbol: Package: asmmath,… etc: Command \mathbb{R} ExampleSets in mathematics, are simply a collection of distinct objects forming a group. A set can have any group of items, be it a collection of numbers, days of a week, types of vehicles, and so on. Every item in the set is called an element of the set. Curly brackets are used while writing a set. the set of rational numbers You have already met the set notation {x: 1 x 3}. This is read as: the set of numbers x such that x lies between 1 and 3. The set notation can also be written as {x: 1 x 3, where x }. This is read as: the set of numbers x such that x lies between 1 and 3 where x is a real number. {x: 1 x 7, where x } A {x: 3 x 5} B ...Sets. A set is an unordered collection of distinct elements. Generally, the elements are of the same type (e.g. real numbers) but a set can be made up of elements of different types. The following notation is commonly used to specify a set: A ={2,3,5,7,9} Note that the elements are enclosed by 'curly braces' {} and separated by commas. all of the counting numbers (1, 2, 3, etc.) plus 0 Integers: (can be positive or negative) all of the whole numbers (1, 2, 3, etc.) plus all of their opposites (-1, -2, -3, etc.) and also 0 Rational numbers: any number that can be expressed as a fraction of two integers (like 92, -56/3, √25, or any other number with a repeating or terminating ....