2
votes
3answers
290 views

Pronouncing $A\triangle B$

How would one pronounce an expression involving a set symmetric difference, such as $A\triangle B$? Would that be read "A symmetric difference B?" Or perhaps something like "A xor B?" This came up ...
17
votes
3answers
450 views

How do you pronounce the inverse of the $\in$ relation? How do you say $G\ni x$?

If I am talking about sets $G$ and $H$ and I want to say in words that $G\subset H$, I, like everyone else, will say that $G$ is contained in $H$, or that $H$ contains $G$. But if I am talking about ...