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Mirrors > Home > MPE Home > Th. List > ofsubeq0 | Structured version Visualization version GIF version |
Description: Function analogue of subeq0 11562. (Contributed by Mario Carneiro, 24-Jul-2014.) |
Ref | Expression |
---|---|
ofsubeq0 | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → ((𝐹 ∘f − 𝐺) = (𝐴 × {0}) ↔ 𝐹 = 𝐺)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp2 1137 | . . . . . . 7 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → 𝐹:𝐴⟶ℂ) | |
2 | 1 | ffnd 6748 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → 𝐹 Fn 𝐴) |
3 | simp3 1138 | . . . . . . 7 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → 𝐺:𝐴⟶ℂ) | |
4 | 3 | ffnd 6748 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → 𝐺 Fn 𝐴) |
5 | simp1 1136 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → 𝐴 ∈ 𝑉) | |
6 | inidm 4248 | . . . . . 6 ⊢ (𝐴 ∩ 𝐴) = 𝐴 | |
7 | eqidd 2741 | . . . . . 6 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) = (𝐹‘𝑥)) | |
8 | eqidd 2741 | . . . . . 6 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐺‘𝑥) = (𝐺‘𝑥)) | |
9 | 2, 4, 5, 5, 6, 7, 8 | ofval 7725 | . . . . 5 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → ((𝐹 ∘f − 𝐺)‘𝑥) = ((𝐹‘𝑥) − (𝐺‘𝑥))) |
10 | c0ex 11284 | . . . . . . 7 ⊢ 0 ∈ V | |
11 | 10 | fvconst2 7241 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴 → ((𝐴 × {0})‘𝑥) = 0) |
12 | 11 | adantl 481 | . . . . 5 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → ((𝐴 × {0})‘𝑥) = 0) |
13 | 9, 12 | eqeq12d 2756 | . . . 4 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (((𝐹 ∘f − 𝐺)‘𝑥) = ((𝐴 × {0})‘𝑥) ↔ ((𝐹‘𝑥) − (𝐺‘𝑥)) = 0)) |
14 | 1 | ffvelcdmda 7118 | . . . . 5 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℂ) |
15 | 3 | ffvelcdmda 7118 | . . . . 5 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐺‘𝑥) ∈ ℂ) |
16 | 14, 15 | subeq0ad 11657 | . . . 4 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (((𝐹‘𝑥) − (𝐺‘𝑥)) = 0 ↔ (𝐹‘𝑥) = (𝐺‘𝑥))) |
17 | 13, 16 | bitrd 279 | . . 3 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (((𝐹 ∘f − 𝐺)‘𝑥) = ((𝐴 × {0})‘𝑥) ↔ (𝐹‘𝑥) = (𝐺‘𝑥))) |
18 | 17 | ralbidva 3182 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (∀𝑥 ∈ 𝐴 ((𝐹 ∘f − 𝐺)‘𝑥) = ((𝐴 × {0})‘𝑥) ↔ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))) |
19 | 2, 4, 5, 5, 6 | offn 7727 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (𝐹 ∘f − 𝐺) Fn 𝐴) |
20 | 10 | fconst 6807 | . . . 4 ⊢ (𝐴 × {0}):𝐴⟶{0} |
21 | ffn 6747 | . . . 4 ⊢ ((𝐴 × {0}):𝐴⟶{0} → (𝐴 × {0}) Fn 𝐴) | |
22 | 20, 21 | ax-mp 5 | . . 3 ⊢ (𝐴 × {0}) Fn 𝐴 |
23 | eqfnfv 7064 | . . 3 ⊢ (((𝐹 ∘f − 𝐺) Fn 𝐴 ∧ (𝐴 × {0}) Fn 𝐴) → ((𝐹 ∘f − 𝐺) = (𝐴 × {0}) ↔ ∀𝑥 ∈ 𝐴 ((𝐹 ∘f − 𝐺)‘𝑥) = ((𝐴 × {0})‘𝑥))) | |
24 | 19, 22, 23 | sylancl 585 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → ((𝐹 ∘f − 𝐺) = (𝐴 × {0}) ↔ ∀𝑥 ∈ 𝐴 ((𝐹 ∘f − 𝐺)‘𝑥) = ((𝐴 × {0})‘𝑥))) |
25 | eqfnfv 7064 | . . 3 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) → (𝐹 = 𝐺 ↔ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))) | |
26 | 2, 4, 25 | syl2anc 583 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (𝐹 = 𝐺 ↔ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))) |
27 | 18, 24, 26 | 3bitr4d 311 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → ((𝐹 ∘f − 𝐺) = (𝐴 × {0}) ↔ 𝐹 = 𝐺)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1087 = wceq 1537 ∈ wcel 2108 ∀wral 3067 {csn 4648 × cxp 5698 Fn wfn 6568 ⟶wf 6569 ‘cfv 6573 (class class class)co 7448 ∘f cof 7712 ℂcc 11182 0cc0 11184 − cmin 11520 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-rep 5303 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770 ax-resscn 11241 ax-1cn 11242 ax-icn 11243 ax-addcl 11244 ax-addrcl 11245 ax-mulcl 11246 ax-mulrcl 11247 ax-mulcom 11248 ax-addass 11249 ax-mulass 11250 ax-distr 11251 ax-i2m1 11252 ax-1ne0 11253 ax-1rid 11254 ax-rnegex 11255 ax-rrecex 11256 ax-cnre 11257 ax-pre-lttri 11258 ax-pre-lttrn 11259 ax-pre-ltadd 11260 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-nel 3053 df-ral 3068 df-rex 3077 df-reu 3389 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-iun 5017 df-br 5167 df-opab 5229 df-mpt 5250 df-id 5593 df-po 5607 df-so 5608 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-riota 7404 df-ov 7451 df-oprab 7452 df-mpo 7453 df-of 7714 df-er 8763 df-en 9004 df-dom 9005 df-sdom 9006 df-pnf 11326 df-mnf 11327 df-ltxr 11329 df-sub 11522 |
This theorem is referenced by: psrridm 22006 dv11cn 26060 coeeulem 26283 plydiveu 26358 facth 26366 quotcan 26369 plyexmo 26373 mpaaeu 43107 |
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