Mathematical Symbols

• $\in$ - element of the set
• $\notin$ - not an element of the set
• $\subset$ - a subset of the set
• $\subseteq$ - a subset of the set, can allow the possibility that both sets are exactly the same
• $\cup$ - set union
• $\cap$ - set Intersection
• $\varnothing$ - empty set {}
• $N$ - Natural Number
• $Z$ - Integer
• $Q$ - Rational Number
• $R$ - Real Number
• $C$ - Complex Number
• $O$ - Odd number
• $E$ - Even number
• $⟹$ - Conditional Statement If $P⟹Q$, then if $P$ is true, $Q$ is true
• $⟺$ - Biconditional Statement Both $P⟹Q$ and $Q⟹P$ must be true
• $\forall$ - For all
• $\exists$ - There exists
• $\wedge$ - And
• $\vee$ - Or. Evaluated last
• $\neg$ - Not . True → False and False → True. Evaluated first