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Mirrors > Home > MPE Home > Th. List > Mathboxes > ofdivcan4 | Structured version Visualization version GIF version |
Description: Function analogue of divcan4 11706. (Contributed by Steve Rodriguez, 4-Nov-2015.) |
Ref | Expression |
---|---|
ofdivcan4 | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → ((𝐹 ∘f · 𝐺) ∘f / 𝐺) = 𝐹) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp1 1136 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐴 ∈ 𝑉) | |
2 | simp2 1137 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐹:𝐴⟶ℂ) | |
3 | 2 | ffnd 6631 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐹 Fn 𝐴) |
4 | simp3 1138 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐺:𝐴⟶(ℂ ∖ {0})) | |
5 | 4 | ffnd 6631 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐺 Fn 𝐴) |
6 | inidm 4158 | . . 3 ⊢ (𝐴 ∩ 𝐴) = 𝐴 | |
7 | 3, 5, 1, 1, 6 | offn 7578 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → (𝐹 ∘f · 𝐺) Fn 𝐴) |
8 | eqidd 2737 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) = (𝐹‘𝑥)) | |
9 | eqidd 2737 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → (𝐺‘𝑥) = (𝐺‘𝑥)) | |
10 | 3, 5, 1, 1, 6, 8, 9 | ofval 7576 | . 2 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → ((𝐹 ∘f · 𝐺)‘𝑥) = ((𝐹‘𝑥) · (𝐺‘𝑥))) |
11 | ffvelcdm 6991 | . . . 4 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℂ) | |
12 | 2, 11 | sylan 581 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℂ) |
13 | ffvelcdm 6991 | . . . . 5 ⊢ ((𝐺:𝐴⟶(ℂ ∖ {0}) ∧ 𝑥 ∈ 𝐴) → (𝐺‘𝑥) ∈ (ℂ ∖ {0})) | |
14 | eldifsn 4726 | . . . . 5 ⊢ ((𝐺‘𝑥) ∈ (ℂ ∖ {0}) ↔ ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) | |
15 | 13, 14 | sylib 217 | . . . 4 ⊢ ((𝐺:𝐴⟶(ℂ ∖ {0}) ∧ 𝑥 ∈ 𝐴) → ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) |
16 | 4, 15 | sylan 581 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) |
17 | divcan4 11706 | . . . 4 ⊢ (((𝐹‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0) → (((𝐹‘𝑥) · (𝐺‘𝑥)) / (𝐺‘𝑥)) = (𝐹‘𝑥)) | |
18 | 17 | 3expb 1120 | . . 3 ⊢ (((𝐹‘𝑥) ∈ ℂ ∧ ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) → (((𝐹‘𝑥) · (𝐺‘𝑥)) / (𝐺‘𝑥)) = (𝐹‘𝑥)) |
19 | 12, 16, 18 | syl2anc 585 | . 2 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → (((𝐹‘𝑥) · (𝐺‘𝑥)) / (𝐺‘𝑥)) = (𝐹‘𝑥)) |
20 | 1, 7, 5, 3, 10, 9, 19 | offveq 7589 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → ((𝐹 ∘f · 𝐺) ∘f / 𝐺) = 𝐹) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 ∧ w3a 1087 = wceq 1539 ∈ wcel 2104 ≠ wne 2941 ∖ cdif 3889 {csn 4565 ⟶wf 6454 ‘cfv 6458 (class class class)co 7307 ∘f cof 7563 ℂcc 10915 0cc0 10917 · cmul 10922 / cdiv 11678 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-rep 5218 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-resscn 10974 ax-1cn 10975 ax-icn 10976 ax-addcl 10977 ax-addrcl 10978 ax-mulcl 10979 ax-mulrcl 10980 ax-mulcom 10981 ax-addass 10982 ax-mulass 10983 ax-distr 10984 ax-i2m1 10985 ax-1ne0 10986 ax-1rid 10987 ax-rnegex 10988 ax-rrecex 10989 ax-cnre 10990 ax-pre-lttri 10991 ax-pre-lttrn 10992 ax-pre-ltadd 10993 ax-pre-mulgt0 10994 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3285 df-reu 3286 df-rab 3287 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-id 5500 df-po 5514 df-so 5515 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-riota 7264 df-ov 7310 df-oprab 7311 df-mpo 7312 df-of 7565 df-er 8529 df-en 8765 df-dom 8766 df-sdom 8767 df-pnf 11057 df-mnf 11058 df-xr 11059 df-ltxr 11060 df-le 11061 df-sub 11253 df-neg 11254 df-div 11679 |
This theorem is referenced by: expgrowth 41991 binomcxplemnotnn0 42012 |
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