Metamath Proof Explorer
Description: An integer power is nonzero if its base is nonzero. (Contributed by NM, 2-Aug-2006) (Revised by Mario Carneiro, 4-Jun-2014)
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Ref |
Expression |
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Assertion |
expne0i |
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Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
expclzlem |
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2 |
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eldifsni |
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3 |
1 2
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syl |
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