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Question: How to create a function f(x) where f(x)=0 if x<0, and f(x)=x if x>=0?

Question:How to create a function f(x) where f(x)=0 if x<0, and f(x)=x if x>=0?

chenaiier 25 Maple 2019
piecewise differential-equations
October 19 2020
1

As the title states, I want to have an equation f(x), and f(x) = 0 if x < 0, f(x) = x if x >= 0. How could I accomplish this?

I'm actually trying to generating a differential equation something like y'(x) + k*h(y) = sin(x) where h(y) is what I described above. Is there any convenient way to do this?
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