Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > muladd11 | GIF version |
Description: A simple product of sums expansion. (Contributed by NM, 21-Feb-2005.) |
Ref | Expression |
---|---|
muladd11 | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((1 + 𝐴) · (1 + 𝐵)) = ((1 + 𝐴) + (𝐵 + (𝐴 · 𝐵)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1cn 7713 | . . . 4 ⊢ 1 ∈ ℂ | |
2 | addcl 7745 | . . . 4 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 + 𝐴) ∈ ℂ) | |
3 | 1, 2 | mpan 420 | . . 3 ⊢ (𝐴 ∈ ℂ → (1 + 𝐴) ∈ ℂ) |
4 | adddi 7752 | . . . 4 ⊢ (((1 + 𝐴) ∈ ℂ ∧ 1 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((1 + 𝐴) · (1 + 𝐵)) = (((1 + 𝐴) · 1) + ((1 + 𝐴) · 𝐵))) | |
5 | 1, 4 | mp3an2 1303 | . . 3 ⊢ (((1 + 𝐴) ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((1 + 𝐴) · (1 + 𝐵)) = (((1 + 𝐴) · 1) + ((1 + 𝐴) · 𝐵))) |
6 | 3, 5 | sylan 281 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((1 + 𝐴) · (1 + 𝐵)) = (((1 + 𝐴) · 1) + ((1 + 𝐴) · 𝐵))) |
7 | 3 | mulid1d 7783 | . . . 4 ⊢ (𝐴 ∈ ℂ → ((1 + 𝐴) · 1) = (1 + 𝐴)) |
8 | 7 | adantr 274 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((1 + 𝐴) · 1) = (1 + 𝐴)) |
9 | adddir 7757 | . . . . 5 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((1 + 𝐴) · 𝐵) = ((1 · 𝐵) + (𝐴 · 𝐵))) | |
10 | 1, 9 | mp3an1 1302 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((1 + 𝐴) · 𝐵) = ((1 · 𝐵) + (𝐴 · 𝐵))) |
11 | mulid2 7764 | . . . . . 6 ⊢ (𝐵 ∈ ℂ → (1 · 𝐵) = 𝐵) | |
12 | 11 | adantl 275 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (1 · 𝐵) = 𝐵) |
13 | 12 | oveq1d 5789 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((1 · 𝐵) + (𝐴 · 𝐵)) = (𝐵 + (𝐴 · 𝐵))) |
14 | 10, 13 | eqtrd 2172 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((1 + 𝐴) · 𝐵) = (𝐵 + (𝐴 · 𝐵))) |
15 | 8, 14 | oveq12d 5792 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (((1 + 𝐴) · 1) + ((1 + 𝐴) · 𝐵)) = ((1 + 𝐴) + (𝐵 + (𝐴 · 𝐵)))) |
16 | 6, 15 | eqtrd 2172 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((1 + 𝐴) · (1 + 𝐵)) = ((1 + 𝐴) + (𝐵 + (𝐴 · 𝐵)))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1331 ∈ wcel 1480 (class class class)co 5774 ℂcc 7618 1c1 7621 + caddc 7623 · cmul 7625 |
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 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-resscn 7712 ax-1cn 7713 ax-icn 7715 ax-addcl 7716 ax-mulcl 7718 ax-mulcom 7721 ax-mulass 7723 ax-distr 7724 ax-1rid 7727 ax-cnre 7731 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-un 3075 df-in 3077 df-ss 3084 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-br 3930 df-iota 5088 df-fv 5131 df-ov 5777 |
This theorem is referenced by: muladd11r 7918 bernneq 10412 |
Copyright terms: Public domain | W3C validator |