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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 10823 fac3 11186 hash3 11270 hashtpgim 11313 nn0o1gt2 12691 flodddiv4 12722 3exp3 13241 13prm 13253 37prm 13258 43prm 13259 83prm 13260 139prm 13261 163prm 13262 317prm 13263 631prm 13264 1259lem1 13265 1259lem2 13266 1259lem3 13267 1259lem4 13268 1259lem5 13269 1259prm 13270 log2ublem3 16184 log2ublog2 16185 birthdaylog2 16189 chtqub 16257 2lgsoddprmlem3c 16394 clwwlknonex2lem1 16844 clwwlknonex2lem2 16845 konigsberglem1 16895 konigsberglem2 16896 konigsberglem3 16897 |
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