![]() |
Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > ILE Home > Th. List > 6p2e8 | GIF version |
Description: 6 + 2 = 8. (Contributed by NM, 11-May-2004.) |
Ref | Expression |
---|---|
6p2e8 | ⊢ (6 + 2) = 8 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-2 8981 | . . . . 5 ⊢ 2 = (1 + 1) | |
2 | 1 | oveq2i 5889 | . . . 4 ⊢ (6 + 2) = (6 + (1 + 1)) |
3 | 6cn 9004 | . . . . 5 ⊢ 6 ∈ ℂ | |
4 | ax-1cn 7907 | . . . . 5 ⊢ 1 ∈ ℂ | |
5 | 3, 4, 4 | addassi 7968 | . . . 4 ⊢ ((6 + 1) + 1) = (6 + (1 + 1)) |
6 | 2, 5 | eqtr4i 2201 | . . 3 ⊢ (6 + 2) = ((6 + 1) + 1) |
7 | df-7 8986 | . . . 4 ⊢ 7 = (6 + 1) | |
8 | 7 | oveq1i 5888 | . . 3 ⊢ (7 + 1) = ((6 + 1) + 1) |
9 | 6, 8 | eqtr4i 2201 | . 2 ⊢ (6 + 2) = (7 + 1) |
10 | df-8 8987 | . 2 ⊢ 8 = (7 + 1) | |
11 | 9, 10 | eqtr4i 2201 | 1 ⊢ (6 + 2) = 8 |
Colors of variables: wff set class |
Syntax hints: = wceq 1353 (class class class)co 5878 1c1 7815 + caddc 7817 2c2 8973 6c6 8977 7c7 8978 8c8 8979 |
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 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-ext 2159 ax-resscn 7906 ax-1cn 7907 ax-1re 7908 ax-addrcl 7911 ax-addass 7916 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-nf 1461 df-sb 1763 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-rex 2461 df-v 2741 df-un 3135 df-in 3137 df-ss 3144 df-sn 3600 df-pr 3601 df-op 3603 df-uni 3812 df-br 4006 df-iota 5180 df-fv 5226 df-ov 5881 df-2 8981 df-3 8982 df-4 8983 df-5 8984 df-6 8985 df-7 8986 df-8 8987 |
This theorem is referenced by: 6p3e9 9072 6t3e18 9491 |
Copyright terms: Public domain | W3C validator |