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Mirrors > Home > MPE Home > Th. List > ofsubeq0 | Structured version Visualization version GIF version |
Description: Function analogue of subeq0 11427. (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 6669 | . . . . . 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 6669 | . . . . . 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 4178 | . . . . . 6 ⊢ (𝐴 ∩ 𝐴) = 𝐴 | |
7 | eqidd 2737 | . . . . . 6 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) = (𝐹‘𝑥)) | |
8 | eqidd 2737 | . . . . . 6 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐺‘𝑥) = (𝐺‘𝑥)) | |
9 | 2, 4, 5, 5, 6, 7, 8 | ofval 7628 | . . . . 5 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → ((𝐹 ∘f − 𝐺)‘𝑥) = ((𝐹‘𝑥) − (𝐺‘𝑥))) |
10 | c0ex 11149 | . . . . . . 7 ⊢ 0 ∈ V | |
11 | 10 | fvconst2 7153 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴 → ((𝐴 × {0})‘𝑥) = 0) |
12 | 11 | adantl 482 | . . . . 5 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → ((𝐴 × {0})‘𝑥) = 0) |
13 | 9, 12 | eqeq12d 2752 | . . . 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 7035 | . . . . 5 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℂ) |
15 | 3 | ffvelcdmda 7035 | . . . . 5 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (𝐺‘𝑥) ∈ ℂ) |
16 | 14, 15 | subeq0ad 11522 | . . . 4 ⊢ (((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) ∧ 𝑥 ∈ 𝐴) → (((𝐹‘𝑥) − (𝐺‘𝑥)) = 0 ↔ (𝐹‘𝑥) = (𝐺‘𝑥))) |
17 | 13, 16 | bitrd 278 | . . 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 3172 | . 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 7630 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (𝐹 ∘f − 𝐺) Fn 𝐴) |
20 | 10 | fconst 6728 | . . . 4 ⊢ (𝐴 × {0}):𝐴⟶{0} |
21 | ffn 6668 | . . . 4 ⊢ ((𝐴 × {0}):𝐴⟶{0} → (𝐴 × {0}) Fn 𝐴) | |
22 | 20, 21 | ax-mp 5 | . . 3 ⊢ (𝐴 × {0}) Fn 𝐴 |
23 | eqfnfv 6982 | . . 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 586 | . 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 6982 | . . 3 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) → (𝐹 = 𝐺 ↔ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))) | |
26 | 2, 4, 25 | syl2anc 584 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ) → (𝐹 = 𝐺 ↔ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))) |
27 | 18, 24, 26 | 3bitr4d 310 | 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 205 ∧ wa 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ∀wral 3064 {csn 4586 × cxp 5631 Fn wfn 6491 ⟶wf 6492 ‘cfv 6496 (class class class)co 7357 ∘f cof 7615 ℂcc 11049 0cc0 11051 − cmin 11385 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2707 ax-rep 5242 ax-sep 5256 ax-nul 5263 ax-pow 5320 ax-pr 5384 ax-un 7672 ax-resscn 11108 ax-1cn 11109 ax-icn 11110 ax-addcl 11111 ax-addrcl 11112 ax-mulcl 11113 ax-mulrcl 11114 ax-mulcom 11115 ax-addass 11116 ax-mulass 11117 ax-distr 11118 ax-i2m1 11119 ax-1ne0 11120 ax-1rid 11121 ax-rnegex 11122 ax-rrecex 11123 ax-cnre 11124 ax-pre-lttri 11125 ax-pre-lttrn 11126 ax-pre-ltadd 11127 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3065 df-rex 3074 df-reu 3354 df-rab 3408 df-v 3447 df-sbc 3740 df-csb 3856 df-dif 3913 df-un 3915 df-in 3917 df-ss 3927 df-nul 4283 df-if 4487 df-pw 4562 df-sn 4587 df-pr 4589 df-op 4593 df-uni 4866 df-iun 4956 df-br 5106 df-opab 5168 df-mpt 5189 df-id 5531 df-po 5545 df-so 5546 df-xp 5639 df-rel 5640 df-cnv 5641 df-co 5642 df-dm 5643 df-rn 5644 df-res 5645 df-ima 5646 df-iota 6448 df-fun 6498 df-fn 6499 df-f 6500 df-f1 6501 df-fo 6502 df-f1o 6503 df-fv 6504 df-riota 7313 df-ov 7360 df-oprab 7361 df-mpo 7362 df-of 7617 df-er 8648 df-en 8884 df-dom 8885 df-sdom 8886 df-pnf 11191 df-mnf 11192 df-ltxr 11194 df-sub 11387 |
This theorem is referenced by: psrridm 21373 dv11cn 25365 coeeulem 25585 plydiveu 25658 facth 25666 quotcan 25669 plyexmo 25673 mpaaeu 41463 |
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