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| Mirrors > Home > ILE Home > Th. List > 8p4e12 | GIF version | ||
| Description: 8 + 4 = 12. (Contributed by Mario Carneiro, 19-Apr-2015.) |
| Ref | Expression |
|---|---|
| 8p4e12 | ⊢ (8 + 4) = ;12 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 8nn0 9507 | . 2 ⊢ 8 ∈ ℕ0 | |
| 2 | 3nn0 9502 | . 2 ⊢ 3 ∈ ℕ0 | |
| 3 | 1nn0 9500 | . 2 ⊢ 1 ∈ ℕ0 | |
| 4 | df-4 9286 | . 2 ⊢ 4 = (3 + 1) | |
| 5 | df-2 9284 | . 2 ⊢ 2 = (1 + 1) | |
| 6 | 8p3e11 9775 | . 2 ⊢ (8 + 3) = ;11 | |
| 7 | 1, 2, 3, 4, 5, 6 | 6p5lem 9764 | 1 ⊢ (8 + 4) = ;12 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6041 1c1 8116 + caddc 8118 2c2 9276 3c3 9277 4c4 9278 8c8 9282 ;cdc 9695 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2206 ax-ext 2214 ax-sep 4221 ax-pow 4279 ax-pr 4314 ax-setind 4650 ax-cnex 8206 ax-resscn 8207 ax-1cn 8208 ax-1re 8209 ax-icn 8210 ax-addcl 8211 ax-addrcl 8212 ax-mulcl 8213 ax-addcom 8215 ax-mulcom 8216 ax-addass 8217 ax-mulass 8218 ax-distr 8219 ax-i2m1 8220 ax-1rid 8222 ax-0id 8223 ax-rnegex 8224 ax-cnre 8226 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-ral 2525 df-rex 2526 df-reu 2527 df-rab 2529 df-v 2814 df-sbc 3042 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-pw 3667 df-sn 3688 df-pr 3689 df-op 3691 df-uni 3908 df-int 3943 df-br 4103 df-opab 4165 df-id 4405 df-xp 4746 df-rel 4747 df-cnv 4748 df-co 4749 df-dm 4750 df-iota 5303 df-fun 5345 df-fv 5351 df-riota 5994 df-ov 6044 df-oprab 6045 df-mpo 6046 df-sub 8434 df-inn 9226 df-2 9284 df-3 9285 df-4 9286 df-5 9287 df-6 9288 df-7 9289 df-8 9290 df-9 9291 df-n0 9485 df-dec 9696 |
| This theorem is referenced by: 8p5e13 9777 4t3e12 9792 8t4e32 9811 |
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