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Mirrors > Home > MPE Home > Th. List > Mathboxes > sn-mulid2 | Structured version Visualization version GIF version |
Description: mulid2 10958 without ax-mulcom 10919. (Contributed by SN, 27-May-2024.) |
Ref | Expression |
---|---|
sn-mulid2 | ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnre 10956 | . 2 ⊢ (𝐴 ∈ ℂ → ∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝐴 = (𝑥 + (i · 𝑦))) | |
2 | 1cnd 10954 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 1 ∈ ℂ) | |
3 | recn 10945 | . . . . . . 7 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℂ) | |
4 | 3 | adantr 480 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑥 ∈ ℂ) |
5 | ax-icn 10914 | . . . . . . . 8 ⊢ i ∈ ℂ | |
6 | 5 | a1i 11 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → i ∈ ℂ) |
7 | recn 10945 | . . . . . . . 8 ⊢ (𝑦 ∈ ℝ → 𝑦 ∈ ℂ) | |
8 | 7 | adantl 481 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℂ) |
9 | 6, 8 | mulcld 10979 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (i · 𝑦) ∈ ℂ) |
10 | 2, 4, 9 | adddid 10983 | . . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (1 · (𝑥 + (i · 𝑦))) = ((1 · 𝑥) + (1 · (i · 𝑦)))) |
11 | remulid2 40395 | . . . . . . 7 ⊢ (𝑥 ∈ ℝ → (1 · 𝑥) = 𝑥) | |
12 | 11 | adantr 480 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (1 · 𝑥) = 𝑥) |
13 | 2, 6, 8 | mulassd 10982 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((1 · i) · 𝑦) = (1 · (i · 𝑦))) |
14 | sn-1ticom 40396 | . . . . . . . . . 10 ⊢ (1 · i) = (i · 1) | |
15 | 14 | oveq1i 7278 | . . . . . . . . 9 ⊢ ((1 · i) · 𝑦) = ((i · 1) · 𝑦) |
16 | 15 | a1i 11 | . . . . . . . 8 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((1 · i) · 𝑦) = ((i · 1) · 𝑦)) |
17 | 6, 2, 8 | mulassd 10982 | . . . . . . . 8 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((i · 1) · 𝑦) = (i · (1 · 𝑦))) |
18 | remulid2 40395 | . . . . . . . . . 10 ⊢ (𝑦 ∈ ℝ → (1 · 𝑦) = 𝑦) | |
19 | 18 | adantl 481 | . . . . . . . . 9 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (1 · 𝑦) = 𝑦) |
20 | 19 | oveq2d 7284 | . . . . . . . 8 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (i · (1 · 𝑦)) = (i · 𝑦)) |
21 | 16, 17, 20 | 3eqtrd 2783 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((1 · i) · 𝑦) = (i · 𝑦)) |
22 | 13, 21 | eqtr3d 2781 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (1 · (i · 𝑦)) = (i · 𝑦)) |
23 | 12, 22 | oveq12d 7286 | . . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((1 · 𝑥) + (1 · (i · 𝑦))) = (𝑥 + (i · 𝑦))) |
24 | 10, 23 | eqtrd 2779 | . . . 4 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (1 · (𝑥 + (i · 𝑦))) = (𝑥 + (i · 𝑦))) |
25 | oveq2 7276 | . . . . 5 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → (1 · 𝐴) = (1 · (𝑥 + (i · 𝑦)))) | |
26 | id 22 | . . . . 5 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → 𝐴 = (𝑥 + (i · 𝑦))) | |
27 | 25, 26 | eqeq12d 2755 | . . . 4 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → ((1 · 𝐴) = 𝐴 ↔ (1 · (𝑥 + (i · 𝑦))) = (𝑥 + (i · 𝑦)))) |
28 | 24, 27 | syl5ibrcom 246 | . . 3 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝐴 = (𝑥 + (i · 𝑦)) → (1 · 𝐴) = 𝐴)) |
29 | 28 | rexlimivv 3222 | . 2 ⊢ (∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝐴 = (𝑥 + (i · 𝑦)) → (1 · 𝐴) = 𝐴) |
30 | 1, 29 | syl 17 | 1 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2109 ∃wrex 3066 (class class class)co 7268 ℂcc 10853 ℝcr 10854 1c1 10856 ici 10857 + caddc 10858 · cmul 10860 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 ax-resscn 10912 ax-1cn 10913 ax-icn 10914 ax-addcl 10915 ax-addrcl 10916 ax-mulcl 10917 ax-mulrcl 10918 ax-addass 10920 ax-mulass 10921 ax-distr 10922 ax-i2m1 10923 ax-1ne0 10924 ax-1rid 10925 ax-rnegex 10926 ax-rrecex 10927 ax-cnre 10928 ax-pre-lttri 10929 ax-pre-lttrn 10930 ax-pre-ltadd 10931 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-nel 3051 df-ral 3070 df-rex 3071 df-reu 3072 df-rmo 3073 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-op 4573 df-uni 4845 df-br 5079 df-opab 5141 df-mpt 5162 df-id 5488 df-po 5502 df-so 5503 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-er 8472 df-en 8708 df-dom 8709 df-sdom 8710 df-pnf 10995 df-mnf 10996 df-ltxr 10998 df-2 12019 df-3 12020 df-resub 40329 |
This theorem is referenced by: it1ei 40398 |
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