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| Mirrors > Home > MPE Home > Th. List > 8p1e9 | Structured version Visualization version GIF version | ||
| Description: 8 + 1 = 9. (Contributed by Mario Carneiro, 18-Apr-2015.) |
| Ref | Expression |
|---|---|
| 8p1e9 | ⊢ (8 + 1) = 9 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-9 12314 | . 2 ⊢ 9 = (8 + 1) | |
| 2 | 1 | eqcomi 2772 | 1 ⊢ (8 + 1) = 9 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7410 1c1 11105 + caddc 11107 8c8 12305 9c9 12306 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-9 2153 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 401 df-ex 1810 df-cleq 2755 df-9 12314 |
| This theorem is used by: cos2bnd 16248 19prm 17182 139prm 17188 317prm 17190 1259lem2 17196 1259lem4 17198 1259lem5 17199 1259prm 17200 2503lem1 17201 2503lem2 17202 2503lem3 17203 4001lem1 17205 quartlem1 27031 log2ub 27123 hgt750lem2 35048 lcmineqlem 42847 3lexlogpow5ineq2 42850 aks4d1p1 42871 sum9cubes 43432 3cubeslem3l 43445 3cubeslem3r 43446 fmtno5lem3 48335 fmtno5lem4 48336 fmtno4prmfac 48352 fmtno5fac 48362 139prmALT 48376 nfermltl8rev 48535 evengpop3 48591 bgoldbtbndlem1 48598 |
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