In details

Set theory

Set theory is the branch of mathematics that studies sets, which are collections of elements. Let's start by studying the mathematical symbols used in this branch.


: belongs

: exist

: does not belong

: does not exist

: is contained

: for all (or whatever)

: not contained

: empty set

: contains

N: set of natural numbers

: Does not contain

Z : set of integers

/: such that

Q: set of rational numbers

: implies that

Q '= I: set of irrational numbers

: if and only if

R: set of real numbers

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