| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > 4p2e6 | GIF version | ||
| Description: 4 + 2 = 6. (Contributed by NM, 11-May-2004.) |
| Ref | Expression |
|---|---|
| 4p2e6 | ⊢ (4 + 2) = 6 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-2 9244 | . . . . 5 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq2i 6039 | . . . 4 ⊢ (4 + 2) = (4 + (1 + 1)) |
| 3 | 4cn 9263 | . . . . 5 ⊢ 4 ∈ ℂ | |
| 4 | ax-1cn 8168 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 5 | 3, 4, 4 | addassi 8230 | . . . 4 ⊢ ((4 + 1) + 1) = (4 + (1 + 1)) |
| 6 | 2, 5 | eqtr4i 2255 | . . 3 ⊢ (4 + 2) = ((4 + 1) + 1) |
| 7 | df-5 9247 | . . . 4 ⊢ 5 = (4 + 1) | |
| 8 | 7 | oveq1i 6038 | . . 3 ⊢ (5 + 1) = ((4 + 1) + 1) |
| 9 | 6, 8 | eqtr4i 2255 | . 2 ⊢ (4 + 2) = (5 + 1) |
| 10 | df-6 9248 | . 2 ⊢ 6 = (5 + 1) | |
| 11 | 9, 10 | eqtr4i 2255 | 1 ⊢ (4 + 2) = 6 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6028 1c1 8076 + caddc 8078 2c2 9236 4c4 9238 5c5 9239 6c6 9240 |
| 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-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-ext 2213 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-addrcl 8172 ax-addass 8177 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-rex 2517 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-iota 5293 df-fv 5341 df-ov 6031 df-2 9244 df-3 9245 df-4 9246 df-5 9247 df-6 9248 |
| This theorem is referenced by: 4p3e7 9330 div4p1lem1div2 9440 4t4e16 9753 6gcd4e2 12629 2exp16 13073 |
| Copyright terms: Public domain | W3C validator |