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Mirrors > Home > MPE Home > Th. List > 2p1e3 | Structured version Visualization version GIF version |
Description: 2 + 1 = 3. (Contributed by Mario Carneiro, 18-Apr-2015.) |
Ref | Expression |
---|---|
2p1e3 | ⊢ (2 + 1) = 3 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-3 11967 | . 2 ⊢ 3 = (2 + 1) | |
2 | 1 | eqcomi 2747 | 1 ⊢ (2 + 1) = 3 |
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