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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 9373 | . 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 6088 1c1 8186 + caddc 8188 2c2 9364 3c3 9365 |
| 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 9373 |
| This theorem is used by: 1p2e3 9448 cnm2m1cnm3 9568 6t5e30 9899 7t5e35 9904 8t4e32 9909 9t4e36 9916 decbin3 9934 halfthird 9935 fz0to3un2pr 10547 m1modge3gt1 10829 fac3 11192 hash3 11276 hashtpgim 11319 nn0o1gt2 12697 flodddiv4 12728 3exp3 13247 13prm 13259 37prm 13264 43prm 13265 83prm 13266 139prm 13267 163prm 13268 317prm 13269 631prm 13270 1259lem1 13271 1259lem2 13272 1259lem3 13273 1259lem4 13274 1259lem5 13275 1259prm 13276 log2ublem3 16223 log2ublog2 16224 birthdaylog2 16228 chtqub 16296 2lgsoddprmlem3c 16433 clwwlknonex2lem1 16883 clwwlknonex2lem2 16884 konigsberglem1 16934 konigsberglem2 16935 konigsberglem3 16936 |
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