Description: The Lebesgue measure of a n-dimensional half-open interval is a real number. (Contributed by Glauco Siliprandi, 8-Apr-2021)
Ref | Expression | ||
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Hypotheses | vonhoire.n | |
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vonhoire.x | |
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vonhoire.a | |
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vonhoire.b | |
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Assertion | vonhoire | |