Correspondence between variables and functions in algebra?

Larry D

New member
When you find a list of rules from algebra on a "cheat sheet", they always show rules with variables such as a and b.

I have been hoping to find something similar for functions, such as f(x) and g(y).

It crossed my mind that since functions f(x) and g(y) compute to numbers, they can be treated the same as the variables a and b, which hold numbers. We interconvert between functions and variables when we write y=f(x) and think nothing of it.

If this is true, all the rules of algebra for variables would hold true for functions.

I know I can't be the first to wonder about this, ;-). Any chance someone knows the name of a theory that covers this, or a person who is given credit for doing work in this area? I need something I can put into Google to research up on this. Thank you.
 
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