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Mirrors > Home > ILE Home > Th. List > 7p1e8 | Unicode version |
Description: 7 + 1 = 8. (Contributed by Mario Carneiro, 18-Apr-2015.) |
Ref | Expression |
---|---|
7p1e8 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-8 8913 | . 2 | |
2 | 1 | eqcomi 2168 | 1 |
Colors of variables: wff set class |
Syntax hints: wceq 1342 (class class class)co 5836 c1 7745 caddc 7747 c7 8904 c8 8905 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1434 ax-gen 1436 ax-ext 2146 |
This theorem depends on definitions: df-bi 116 df-cleq 2157 df-8 8913 |
This theorem is referenced by: 7t4e28 9423 9t9e81 9441 |
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