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A relation is a mapping or pairing of input values with output values.
Seems related to the keyboard mapping. I assume this is telling the computer that a new keyboard type input method is now allowed or used.
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A mapping. It need not be a function.
It is simply a mapping. It could be a function but there are several conditions that need to be met before the mapping can become a function and there is no basis for assuming that those conditions are met.
A function, f, is usually a mapping from a set of input values. This set, whose elements are often denoted by x, is called the domain.A function, f, is usually a mapping from a set of input values. This set, whose elements are often denoted by x, is called the domain.A function, f, is usually a mapping from a set of input values. This set, whose elements are often denoted by x, is called the domain.A function, f, is usually a mapping from a set of input values. This set, whose elements are often denoted by x, is called the domain.
A one-to-one function, a.k.a. an injective function.
gift, offering, grant, donation, input, subscription
That's a proper function, a conformal mapping, etc.
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No. If an input in a function had more than one output, that would be a mapping, but not a function.
It is a mapping which assigns one or more outputs to each set of one or more inputs. A relationship need not be a function.