# Math Help - What does "|" and "->" mean?

1. ## What does "|" and "->" mean?

1)Use mathematical induction to prove that
5 | ( 8n – 3n )
for all nonnegative integers n.
2)

All i would like to know is the meaning of "|" and "->" .
thanks

2. Originally Posted by nahz
1)Use mathematical induction to prove that
5 | ( 8n – 3n )
for all nonnegative integers n.
2)

All i would like to know is the meaning of "|" and "->" .
thanks

$a\mid b=$ "a divides b", meaning $b=ac$ , for some c in some ring (usually the integers)

--> means "implies": A --> B means "if A then B" or "A implies B"

Tonio