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How to declare undefined mathematical function
02-12-2019, 04:24 PM
Post: #1
How to declare undefined mathematical function
I would like to declare a function say, x(t) but without saying what x(t) is.

Thus when I evaluate an integral from -infinity to infinity of dirac(τ)x(t-τ) dτ

the answer should be x(t). Now, this would work with sin(x) because there is no simplification of sin(x).

Is there a way to define such a function? And how would the syntax work to make sure x(t-tau) is functional notation, not x*(t-τ).

Thank you!

(See attachment for the integral I'm trying to evaluate.)
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