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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 9428 | . 2 ⊢ 8 ∈ ℕ0 | |
| 2 | 3nn0 9423 | . 2 ⊢ 3 ∈ ℕ0 | |
| 3 | 1nn0 9421 | . 2 ⊢ 1 ∈ ℕ0 | |
| 4 | df-4 9207 | . 2 ⊢ 4 = (3 + 1) | |
| 5 | df-2 9205 | . 2 ⊢ 2 = (1 + 1) | |
| 6 | 8p3e11 9694 | . 2 ⊢ (8 + 3) = ;11 | |
| 7 | 1, 2, 3, 4, 5, 6 | 6p5lem 9683 | 1 ⊢ (8 + 4) = ;12 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1397 (class class class)co 6021 1c1 8036 + caddc 8038 2c2 9197 3c3 9198 4c4 9199 8c8 9203 ;cdc 9614 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-setind 4635 ax-cnex 8126 ax-resscn 8127 ax-1cn 8128 ax-1re 8129 ax-icn 8130 ax-addcl 8131 ax-addrcl 8132 ax-mulcl 8133 ax-addcom 8135 ax-mulcom 8136 ax-addass 8137 ax-mulass 8138 ax-distr 8139 ax-i2m1 8140 ax-1rid 8142 ax-0id 8143 ax-rnegex 8144 ax-cnre 8146 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-ral 2515 df-rex 2516 df-reu 2517 df-rab 2519 df-v 2804 df-sbc 3032 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-br 4089 df-opab 4151 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-iota 5286 df-fun 5328 df-fv 5334 df-riota 5974 df-ov 6024 df-oprab 6025 df-mpo 6026 df-sub 8355 df-inn 9147 df-2 9205 df-3 9206 df-4 9207 df-5 9208 df-6 9209 df-7 9210 df-8 9211 df-9 9212 df-n0 9406 df-dec 9615 |
| This theorem is referenced by: 8p5e13 9696 4t3e12 9711 8t4e32 9730 |
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