Difference between revisions of "Image"
From Online Dictionary of Crystallography
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| − | <font color="blue">Image</font> (''Fr'') | + | <font color="blue">Image</font> (''Fr''); <font color="black">Immagine</font> (''It''); <font color="purple">像</font> (''Ja''); <font color="orange">صورة</font> (''Ar''). |
Revision as of 09:16, 14 September 2017
Image (Fr); Immagine (It); 像 (Ja); صورة (Ar).
Let X and Y be sets, f be the function f : X → Y, and x be some member of X. Then the image of x under f, denoted f(x), is the unique member y of Y that f associates with x.
The image of a subset A ⊆ X under f is the subset of Y defined by
f[A] = {y ∈ Y | y = f(x) for some x ∈ A}.