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| Mirrors > Home > ILE Home > Th. List > 2p1e3 | 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 9367 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 1 | eqcomi 2242 | 1 ⊢ (2 + 1) = 3 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: = wceq 1402 (class class class)co 6085 1c1 8181 + caddc 8183 2c2 9358 3c3 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-3 9367 |
| This theorem is used by: 1p2e3 9442 cnm2m1cnm3 9562 6t5e30 9893 7t5e35 9898 8t4e32 9903 9t4e36 9910 decbin3 9928 halfthird 9929 fz0to3un2pr 10541 m1modge3gt1 10822 fac3 11185 hash3 11269 hashtpgim 11312 nn0o1gt2 12690 flodddiv4 12721 3exp3 13240 13prm 13252 37prm 13257 43prm 13258 83prm 13259 139prm 13260 163prm 13261 317prm 13262 631prm 13263 1259lem1 13264 1259lem2 13265 1259lem3 13266 1259lem4 13267 1259lem5 13268 1259prm 13269 log2ublem3 16145 log2ublog2 16146 birthdaylog2 16150 chtqub 16218 2lgsoddprmlem3c 16350 clwwlknonex2lem1 16800 clwwlknonex2lem2 16801 konigsberglem1 16851 konigsberglem2 16852 konigsberglem3 16853 |
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