# A level Maths Set Notation

Flashcards by Andreas Spitz, updated more than 1 year ago More Less
 Created by Andreas Spitz almost 3 years ago
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### Description

All the Set notation you are required to know for A-level maths: Sets

## Resource summary

 Question Answer $\in$ is an element of $\notin$ is not an element of ⊆ is a subset of ⊂ is a proper subset of {$$x_1$$, $$x_2$$, ...} the set with elements $$x_1$$, $$x_2$$, ... {$$x$$ : ...} the set of all $$x$$ such that $$n$$ ($$A$$) the number of elements in set $$A$$ $\emptyset$ the empty set ε the universal set $A^ ′$ the complement of the set $$A$$ $N$ the set of natural numbers, {1, 2, 3, ...} $Z$ the set of integers {0,$$\pm1$$, $$\pm2$$, $$\pm3$$...} $Z^+$ the set of positive integers, {1,2,3, ... } $Z^+_0$ the set of non-negative integers, {0, 1, 2, 3, …} $R$ the set of real numbers $Q$ the set of rational numbers, b82b5f06-9d1d-4269-a6b8-a1e79dffa631.jpg (image/jpg) $\cup$ union $\cap$ intersection ($$x$$, $$y$$) the ordered pair $$x$$, $$y$$ [$$a$$, $$b$$] the closed interval {$$x$$$$\in$$$$R$$ : $$a$$$$\leq$$$$x$$$$\leq$$$$b$$} [$$a$$, $$b$$) the interval {$$x$$$$\in$$$$R$$ : $$a$$$$\leq$$$$x$$<$$b$$} ($$a$$, $$b$$] the closed interval {$$x$$$$\in$$$$R$$ : $$a$$<$$x$$$$\leq$$$$b$$} ($$a$$, $$b$$) the open interval {$$x$$$$\in$$$$R$$ : $$a$$<$$x$$<$$b$$}

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