Metamath Proof Explorer
Description: Closure law for surreal subtraction. (Contributed by Scott Fenton, 5-Feb-2025)
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Ref |
Expression |
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Hypotheses |
subscld.1 |
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subscld.2 |
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Assertion |
subscld |
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Proof
Step |
Hyp |
Ref |
Expression |
1 |
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subscld.1 |
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2 |
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subscld.2 |
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3 |
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subscl |
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4 |
1 2 3
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syl2anc |
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