Description: A finite sum in an ordered monoid is monotonic. This proof would be much easier in an ordered group, where an inverse element would be available. (Contributed by Thierry Arnoux, 13-Mar-2018)
Ref | Expression | ||
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Hypotheses | gsumle.b | |
|
gsumle.l | |
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gsumle.m | |
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gsumle.n | |
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gsumle.a | |
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gsumle.f | |
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gsumle.g | |
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gsumle.c | |
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Assertion | gsumle | |