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Mirrors > Home > MPE Home > Th. List > Mathboxes > ofdivcan4 | Structured version Visualization version GIF version |
Description: Function analogue of divcan4 10712. (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 1061 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐴 ∈ 𝑉) | |
2 | simp2 1062 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐹:𝐴⟶ℂ) | |
3 | ffn 6045 | . . . 4 ⊢ (𝐹:𝐴⟶ℂ → 𝐹 Fn 𝐴) | |
4 | 2, 3 | syl 17 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐹 Fn 𝐴) |
5 | simp3 1063 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐺:𝐴⟶(ℂ ∖ {0})) | |
6 | ffn 6045 | . . . 4 ⊢ (𝐺:𝐴⟶(ℂ ∖ {0}) → 𝐺 Fn 𝐴) | |
7 | 5, 6 | syl 17 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → 𝐺 Fn 𝐴) |
8 | inidm 3822 | . . 3 ⊢ (𝐴 ∩ 𝐴) = 𝐴 | |
9 | 4, 7, 1, 1, 8 | offn 6908 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) → (𝐹 ∘𝑓 · 𝐺) Fn 𝐴) |
10 | eqidd 2623 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) = (𝐹‘𝑥)) | |
11 | eqidd 2623 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → (𝐺‘𝑥) = (𝐺‘𝑥)) | |
12 | 4, 7, 1, 1, 8, 10, 11 | ofval 6906 | . 2 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → ((𝐹 ∘𝑓 · 𝐺)‘𝑥) = ((𝐹‘𝑥) · (𝐺‘𝑥))) |
13 | ffvelrn 6357 | . . . 4 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℂ) | |
14 | 2, 13 | sylan 488 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℂ) |
15 | ffvelrn 6357 | . . . . 5 ⊢ ((𝐺:𝐴⟶(ℂ ∖ {0}) ∧ 𝑥 ∈ 𝐴) → (𝐺‘𝑥) ∈ (ℂ ∖ {0})) | |
16 | eldifsn 4317 | . . . . 5 ⊢ ((𝐺‘𝑥) ∈ (ℂ ∖ {0}) ↔ ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) | |
17 | 15, 16 | sylib 208 | . . . 4 ⊢ ((𝐺:𝐴⟶(ℂ ∖ {0}) ∧ 𝑥 ∈ 𝐴) → ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) |
18 | 5, 17 | sylan 488 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) |
19 | divcan4 10712 | . . . 4 ⊢ (((𝐹‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0) → (((𝐹‘𝑥) · (𝐺‘𝑥)) / (𝐺‘𝑥)) = (𝐹‘𝑥)) | |
20 | 19 | 3expb 1266 | . . 3 ⊢ (((𝐹‘𝑥) ∈ ℂ ∧ ((𝐺‘𝑥) ∈ ℂ ∧ (𝐺‘𝑥) ≠ 0)) → (((𝐹‘𝑥) · (𝐺‘𝑥)) / (𝐺‘𝑥)) = (𝐹‘𝑥)) |
21 | 14, 18, 20 | syl2anc 693 | . 2 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶(ℂ ∖ {0})) ∧ 𝑥 ∈ 𝐴) → (((𝐹‘𝑥) · (𝐺‘𝑥)) / (𝐺‘𝑥)) = (𝐹‘𝑥)) |
22 | 1, 9, 7, 4, 12, 11, 21 | offveq 6918 | 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 384 ∧ w3a 1037 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 ∖ cdif 3571 {csn 4177 Fn wfn 5883 ⟶wf 5884 ‘cfv 5888 (class class class)co 6650 ∘𝑓 cof 6895 ℂcc 9934 0cc0 9936 · cmul 9941 / cdiv 10684 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-po 5035 df-so 5036 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-of 6897 df-er 7742 df-en 7956 df-dom 7957 df-sdom 7958 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 |
This theorem is referenced by: expgrowth 38534 binomcxplemnotnn0 38555 |
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