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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 8926 | . . . . 5 ⊢ 2 = (1 + 1) | |
2 | 1 | oveq2i 5862 | . . . 4 ⊢ (4 + 2) = (4 + (1 + 1)) |
3 | 4cn 8945 | . . . . 5 ⊢ 4 ∈ ℂ | |
4 | ax-1cn 7856 | . . . . 5 ⊢ 1 ∈ ℂ | |
5 | 3, 4, 4 | addassi 7917 | . . . 4 ⊢ ((4 + 1) + 1) = (4 + (1 + 1)) |
6 | 2, 5 | eqtr4i 2194 | . . 3 ⊢ (4 + 2) = ((4 + 1) + 1) |
7 | df-5 8929 | . . . 4 ⊢ 5 = (4 + 1) | |
8 | 7 | oveq1i 5861 | . . 3 ⊢ (5 + 1) = ((4 + 1) + 1) |
9 | 6, 8 | eqtr4i 2194 | . 2 ⊢ (4 + 2) = (5 + 1) |
10 | df-6 8930 | . 2 ⊢ 6 = (5 + 1) | |
11 | 9, 10 | eqtr4i 2194 | 1 ⊢ (4 + 2) = 6 |
Colors of variables: wff set class |
Syntax hints: = wceq 1348 (class class class)co 5851 1c1 7764 + caddc 7766 2c2 8918 4c4 8920 5c5 8921 6c6 8922 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-ext 2152 ax-resscn 7855 ax-1cn 7856 ax-1re 7857 ax-addrcl 7860 ax-addass 7865 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-nf 1454 df-sb 1756 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-rex 2454 df-v 2732 df-un 3125 df-in 3127 df-ss 3134 df-sn 3587 df-pr 3588 df-op 3590 df-uni 3795 df-br 3988 df-iota 5158 df-fv 5204 df-ov 5854 df-2 8926 df-3 8927 df-4 8928 df-5 8929 df-6 8930 |
This theorem is referenced by: 4p3e7 9011 div4p1lem1div2 9120 4t4e16 9430 6gcd4e2 11939 |
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