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Mirrors > Home > MPE Home > Th. List > Mathboxes > ofdivcan4 | Structured version Visualization version GIF version |
Description: Function analogue of divcan4 11363. (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 1133 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐴 ∈ 𝑉) | |
2 | simp2 1134 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐹:𝐴⟶ℂ) | |
3 | 2 | ffnd 6499 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐹 Fn 𝐴) |
4 | simp3 1135 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐺:𝐴⟶(ℂ ∖ {0})) | |
5 | 4 | ffnd 6499 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐺 Fn 𝐴) |
6 | inidm 4123 | . . 3 ⊢ (𝐴 ∩ 𝐴) = 𝐴 | |
7 | 3, 5, 1, 1, 6 | offn 7417 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → (𝐹 ∘f · 𝐺) Fn 𝐴) |
8 | eqidd 2759 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) = (𝐹‘𝑥)) | |
9 | eqidd 2759 | . . 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 7415 | . 2 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → ((𝐹 ∘f · 𝐺)‘𝑥) = ((𝐹‘𝑥) · (𝐺‘𝑥))) |
11 | ffvelrn 6840 | . . . 4 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℂ) | |
12 | 2, 11 | sylan 583 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℂ) |
13 | ffvelrn 6840 | . . . . 5 ⊢ ((𝐺:𝐴⟶(ℂ ∖ {0}) ∧ 𝑥 ∈ 𝐴) → (𝐺‘𝑥) ∈ (ℂ ∖ {0})) | |
14 | eldifsn 4677 | . . . . 5 ⊢ ((𝐺‘𝑥) ∈ (ℂ ∖ {0}) ↔ ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) | |
15 | 13, 14 | sylib 221 | . . . 4 ⊢ ((𝐺:𝐴⟶(ℂ ∖ {0}) ∧ 𝑥 ∈ 𝐴) → ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) |
16 | 4, 15 | sylan 583 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) |
17 | divcan4 11363 | . . . 4 ⊢ (((𝐹‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0) → (((𝐹‘𝑥) · (𝐺‘𝑥)) / (𝐺‘𝑥)) = (𝐹‘𝑥)) | |
18 | 17 | 3expb 1117 | . . 3 ⊢ (((𝐹‘𝑥) ∈ ℂ ∧ ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) → (((𝐹‘𝑥) · (𝐺‘𝑥)) / (𝐺‘𝑥)) = (𝐹‘𝑥)) |
19 | 12, 16, 18 | syl2anc 587 | . 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 7428 | 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 399 ∧ w3a 1084 = wceq 1538 ∈ wcel 2111 ≠ wne 2951 ∖ cdif 3855 {csn 4522 ⟶wf 6331 ‘cfv 6335 (class class class)co 7150 ∘f cof 7403 ℂcc 10573 0cc0 10575 · cmul 10580 / cdiv 11335 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2729 ax-rep 5156 ax-sep 5169 ax-nul 5176 ax-pow 5234 ax-pr 5298 ax-un 7459 ax-resscn 10632 ax-1cn 10633 ax-icn 10634 ax-addcl 10635 ax-addrcl 10636 ax-mulcl 10637 ax-mulrcl 10638 ax-mulcom 10639 ax-addass 10640 ax-mulass 10641 ax-distr 10642 ax-i2m1 10643 ax-1ne0 10644 ax-1rid 10645 ax-rnegex 10646 ax-rrecex 10647 ax-cnre 10648 ax-pre-lttri 10649 ax-pre-lttrn 10650 ax-pre-ltadd 10651 ax-pre-mulgt0 10652 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2557 df-eu 2588 df-clab 2736 df-cleq 2750 df-clel 2830 df-nfc 2901 df-ne 2952 df-nel 3056 df-ral 3075 df-rex 3076 df-reu 3077 df-rmo 3078 df-rab 3079 df-v 3411 df-sbc 3697 df-csb 3806 df-dif 3861 df-un 3863 df-in 3865 df-ss 3875 df-nul 4226 df-if 4421 df-pw 4496 df-sn 4523 df-pr 4525 df-op 4529 df-uni 4799 df-iun 4885 df-br 5033 df-opab 5095 df-mpt 5113 df-id 5430 df-po 5443 df-so 5444 df-xp 5530 df-rel 5531 df-cnv 5532 df-co 5533 df-dm 5534 df-rn 5535 df-res 5536 df-ima 5537 df-iota 6294 df-fun 6337 df-fn 6338 df-f 6339 df-f1 6340 df-fo 6341 df-f1o 6342 df-fv 6343 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-of 7405 df-er 8299 df-en 8528 df-dom 8529 df-sdom 8530 df-pnf 10715 df-mnf 10716 df-xr 10717 df-ltxr 10718 df-le 10719 df-sub 10910 df-neg 10911 df-div 11336 |
This theorem is referenced by: expgrowth 41412 binomcxplemnotnn0 41433 |
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