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Determining floor of rational expression #21429

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ryotatomioka opened this issue May 4, 2021 · 0 comments · May be fixed by #21431
Open

Determining floor of rational expression #21429

ryotatomioka opened this issue May 4, 2021 · 0 comments · May be fixed by #21431
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@ryotatomioka
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I think it would be great if sympy could determine

x = sympy.Symbol("x", integer=True, positive=True)
sympy.floor(-1/x) == -1

In other words,

0 > -1/x >= -1

or

0 < 1/x <= 1
@smichr smichr linked a pull request May 4, 2021 that will close this issue
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[wip] enhanced relational comparisons smichr/sympy
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@oscarbenjamin @ryotatomioka