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| Mirrors > Home > ILE Home > Th. List > 3p1e4 | Unicode version | ||
| Description: 3 + 1 = 4. (Contributed by Mario Carneiro, 18-Apr-2015.) |
| Ref | Expression |
|---|---|
| 3p1e4 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-4 9374 |
. 2
| |
| 2 | 1 | eqcomi 2242 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| 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 9374 |
| This theorem is used by: 7t6e42 9904 8t5e40 9909 9t5e45 9916 fac4 11192 4bc3eq4 11233 hash4 11276 2exp16 13245 43prm 13264 83prm 13265 317prm 13268 1259lem2 13271 1259lem3 13272 1259lem4 13273 1259lem5 13274 cosq23lt0 16077 binom4 16236 log2ublem3 16240 log2ublog2 16241 bclbnd 16324 |
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