# Totals

This crossword clue is for the definition: Totals.
it’s A 6 letters crossword puzzle definition.
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Last seen on: LA Times Crossword 25 Dec 18, Tuesday

### Random information on the term “Totals”:

In mathematics, a partial function from X to Y (sometimes written as f : X ↛ Y or f: X ⇸ Y) is a function f: X′ → Y, for some proper subset X′ of X. It generalizes the concept of a function f : X → Y by not forcing f to map every element of X to an element of Y (only some proper subset X′ of X). If X′ = X, then f is called a total function and is equivalent to a function. Partial functions are often used when the exact domain, X, is not known (e.g. many functions in computability theory[example needed]).

### New Crossword clues and help App now available in the App Store and Google Play Store!  Specifically, we will say that for any x ∈ X, either:

For example, we can consider the square root function restricted to the integers

Thus g(n) is only defined for n that are perfect squares (i.e., 0, 1, 4, 9, 16, …). So, g(25) = 5, but g(26) is undefined.

There are two distinct meanings in current mathematical usage for the notion of the domain of a partial function. Most mathematicians, including recursion theorists, use the term “domain of f” for the set of all values x such that f(x) is defined (X’ above). But some, particularly category theorists, consider the domain of a partial function f:X → Y to be X, and refer to X’ as the domain of definition. Similarly, the term range can refer to either the codomain or the image of a function.