If you do any computer science algorithm work, you soon run into mathematical notation. Below is a reference of common symbols used (will be expanded over time):

:
such that 
⊂
subset 
∈
member 
∉
not member 
∪
Union 
∩
Intersection 
∅
Empty set 
∀
for all 
∃
there exists 
^
logical and 
∨
logical or 
⇒
implies 
⇔
is equivalent to 
∑
sum of 
∏
product of