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Function question (split from Ordinary differential equation)


Niyilium

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1 hour ago, HallsofIvy said:

For example, if u(x, t)= x2+ t2 then u(., t) is the function that takes 3 to the function u(3, t)= 9+ t2, that takes 5 to u(5, t)= 25+ t2, etc.  It maps a number to a function.

This is not an example of what I wrote :rolleyes:. It also makes sense, but I cannot recall having seen it before.

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