435 B
Executable file
435 B
Executable file
Sets and numbers
A collection of well defined objects. Such as the set of all even numbers
V = {x \in \mathbb{N} | x = 2n \space \mathrm{for} \space n \in \mathbb{N}}.
Interception and union
\mathrm{Let}
V = {x \in \mathbb{R} | 2 \leq x < 4} = [2 ; 4),
W = {x \in \mathbb{R} | \pi < x < 2\pi} = (\pi ; 2\pi).
\mathrm{Interception: } V \cap W = (\pi ; 4).\mathrm{Union: } V \cup W = [2 ; 2\pi).