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| Mirrors > Home > ILE Home > Th. List > 3p1e4 | GIF version | ||
| Description: 3 + 1 = 4. (Contributed by Mario Carneiro, 18-Apr-2015.) |
| Ref | Expression |
|---|---|
| 3p1e4 | ⊢ (3 + 1) = 4 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-4 9367 | . 2 ⊢ 4 = (3 + 1) | |
| 2 | 1 | eqcomi 2242 | 1 ⊢ (3 + 1) = 4 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: = wceq 1402 (class class class)co 6085 1c1 8180 + caddc 8182 3c3 9358 4c4 9359 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-gen 1502 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-cleq 2231 df-4 9367 |
| This theorem is used by: 7t6e42 9898 8t5e40 9903 9t5e45 9910 fac4 11185 4bc3eq4 11226 hash4 11269 2exp16 13237 43prm 13256 83prm 13257 317prm 13260 1259lem2 13263 1259lem3 13264 1259lem4 13265 1259lem5 13266 cosq23lt0 15984 binom4 16138 log2ublem3 16142 log2ublog2 16143 bclbnd 16205 |
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