Question

what does this math symbol mean?

Answer 1

the vertical bar + right arrow symbol in http://puu.sh/c6CwO/70aaaa2221.png

Answer 2

i think it just means f is mapped to that sum

Answer 3

i would need more contextual info, but it looks like what you might see for example

x |-> 3x + 5 ,
showing the action of the function on individual elements

Answer 4

it comes from this http://puu.sh/c6CGv/e71bcb8a83.png

Answer 5

what do u mean by 'mapped to'

Answer 6

mapping is another word for a function, x gets 'mapped' to y,

Answer 7

but strictly speaking a function is a specific type of association between two sets

Answer 8

x |-> 3x + 5 means x gets mapped to 3x + 5.
another way of saying this is f(x) = 3x + 5

Answer 9

thanks XD