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- Thread starter SteveKeeling
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matt grime

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If you had say the diamond going through the points (1,0) (0,1) (-1,0) (0,-1) then the equations of the boundary are things like: x+/-y=+/-1

suggesting the best coordinates are u=x+y and v=x-y, as u and v range between -1 and 1.

Sometimes the integrand will imply what to pick: anything with a sqrt(x^2+y^2) might be tractable with polars.

Do lots of examples. It is the only way to learn to do, erm, examples.

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