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| Mirrors > Home > ILE Home > Th. List > 7t6e42 | GIF version | ||
| Description: 7 times 6 equals 42. (Contributed by Mario Carneiro, 19-Apr-2015.) |
| Ref | Expression |
|---|---|
| 7t6e42 | ⊢ (7 · 6) = ;42 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 7nn0 9585 | . 2 ⊢ 7 ∈ ℕ0 | |
| 2 | 5nn0 9583 | . 2 ⊢ 5 ∈ ℕ0 | |
| 3 | df-6 9367 | . 2 ⊢ 6 = (5 + 1) | |
| 4 | 7t5e35 9888 | . 2 ⊢ (7 · 5) = ;35 | |
| 5 | 3nn0 9581 | . . 3 ⊢ 3 ∈ ℕ0 | |
| 6 | eqid 2238 | . . 3 ⊢ ;35 = ;35 | |
| 7 | 3p1e4 9440 | . . 3 ⊢ (3 + 1) = 4 | |
| 8 | 2nn0 9580 | . . 3 ⊢ 2 ∈ ℕ0 | |
| 9 | 1 | nn0cni 9575 | . . . 4 ⊢ 7 ∈ ℂ |
| 10 | 2 | nn0cni 9575 | . . . 4 ⊢ 5 ∈ ℂ |
| 11 | 7p5e12 9853 | . . . 4 ⊢ (7 + 5) = ;12 | |
| 12 | 9, 10, 11 | addcomli 8471 | . . 3 ⊢ (5 + 7) = ;12 |
| 13 | 5, 2, 1, 6, 7, 8, 12 | decaddci 9837 | . 2 ⊢ (;35 + 7) = ;42 |
| 14 | 1, 2, 3, 4, 13 | 4t3lem 9873 | 1 ⊢ (7 · 6) = ;42 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: = wceq 1402 (class class class)co 6085 1c1 8180 · cmul 8184 2c2 9355 3c3 9356 4c4 9357 5c5 9358 6c6 9359 7c7 9360 ;cdc 9777 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-setind 4684 ax-cnex 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-addcom 8279 ax-mulcom 8280 ax-addass 8281 ax-mulass 8282 ax-distr 8283 ax-i2m1 8284 ax-1rid 8286 ax-0id 8287 ax-rnegex 8288 ax-cnre 8290 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4131 df-opab 4193 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-iota 5337 df-fun 5379 df-fv 5385 df-riota 6038 df-ov 6088 df-oprab 6089 df-mpo 6090 df-sub 8499 df-inn 9305 df-2 9363 df-3 9364 df-4 9365 df-5 9366 df-6 9367 df-7 9368 df-8 9369 df-9 9370 df-n0 9564 df-dec 9778 |
| This theorem is used by: 7t7e49 9890 |
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