# Can you tell me what this math terminology means?

What search terms could I use to find out more about this. How could I use e.g. a₁ in an equation.

### 1 Answer

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- SlowfingerLv 61 month agoFavorite Answer
In set theory, symbol → denotes a function.

f: X → Y means the function f maps the set X into the set Y.

For example, phrasing

Let f:R→R with f(x)=x²

is used to tell that f(x)=x² has set od real numbers R both as domain and codomain, that is, both argument and the result are real numbers.

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