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Question: Integration in a region?

Question:Integration in a region?

Mariusz Iwaniuk 1526 Maple 2018
int nlpsolve
July 02 2018
0

I want to calculate and reproduce this question  in Maple.

with(Optimization):

f := (x, y) -> op(1, NLPSolve(sin(a*x*y), a = 1 .. 5));

int(`if`(f(x, y) > 0, 1, 0), [x = 0 .. 1, y = 0 .. 1], numeric);

# 0 

,but I FAIL.

It should give me: 0.922105

 

Thanks.
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