Metamath Proof Explorer
Description: 0 is a right identity for extended real addition. (Contributed by Glauco Siliprandi, 17-Aug-2020)
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Ref |
Expression |
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Hypothesis |
xaddridd.1 |
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Assertion |
xaddridd |
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Proof
Step |
Hyp |
Ref |
Expression |
1 |
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xaddridd.1 |
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2 |
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xaddrid |
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3 |
1 2
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syl |
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