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Mirrors > Home > MPE Home > Th. List > suppssr | Structured version Visualization version GIF version |
Description: A function is zero outside its support. (Contributed by Mario Carneiro, 19-Dec-2014.) (Revised by AV, 28-May-2019.) |
Ref | Expression |
---|---|
suppssr.f | ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) |
suppssr.n | ⊢ (𝜑 → (𝐹 supp 𝑍) ⊆ 𝑊) |
suppssr.a | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
suppssr.z | ⊢ (𝜑 → 𝑍 ∈ 𝑈) |
Ref | Expression |
---|---|
suppssr | ⊢ ((𝜑 ∧ 𝑋 ∈ (𝐴 ∖ 𝑊)) → (𝐹‘𝑋) = 𝑍) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldif 3893 | . 2 ⊢ (𝑋 ∈ (𝐴 ∖ 𝑊) ↔ (𝑋 ∈ 𝐴 ∧ ¬ 𝑋 ∈ 𝑊)) | |
2 | fvex 6769 | . . . . . 6 ⊢ (𝐹‘𝑋) ∈ V | |
3 | eldifsn 4717 | . . . . . 6 ⊢ ((𝐹‘𝑋) ∈ (V ∖ {𝑍}) ↔ ((𝐹‘𝑋) ∈ V ∧ (𝐹‘𝑋) ≠ 𝑍)) | |
4 | 2, 3 | mpbiran 705 | . . . . 5 ⊢ ((𝐹‘𝑋) ∈ (V ∖ {𝑍}) ↔ (𝐹‘𝑋) ≠ 𝑍) |
5 | suppssr.f | . . . . . . . . . 10 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) | |
6 | 5 | ffnd 6585 | . . . . . . . . 9 ⊢ (𝜑 → 𝐹 Fn 𝐴) |
7 | suppssr.a | . . . . . . . . 9 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
8 | suppssr.z | . . . . . . . . 9 ⊢ (𝜑 → 𝑍 ∈ 𝑈) | |
9 | elsuppfn 7958 | . . . . . . . . 9 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝑉 ∧ 𝑍 ∈ 𝑈) → (𝑋 ∈ (𝐹 supp 𝑍) ↔ (𝑋 ∈ 𝐴 ∧ (𝐹‘𝑋) ≠ 𝑍))) | |
10 | 6, 7, 8, 9 | syl3anc 1369 | . . . . . . . 8 ⊢ (𝜑 → (𝑋 ∈ (𝐹 supp 𝑍) ↔ (𝑋 ∈ 𝐴 ∧ (𝐹‘𝑋) ≠ 𝑍))) |
11 | ibar 528 | . . . . . . . . . . 11 ⊢ ((𝐹‘𝑋) ∈ V → ((𝐹‘𝑋) ≠ 𝑍 ↔ ((𝐹‘𝑋) ∈ V ∧ (𝐹‘𝑋) ≠ 𝑍))) | |
12 | 2, 11 | mp1i 13 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑋 ∈ 𝐴) → ((𝐹‘𝑋) ≠ 𝑍 ↔ ((𝐹‘𝑋) ∈ V ∧ (𝐹‘𝑋) ≠ 𝑍))) |
13 | 12, 3 | bitr4di 288 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 ∈ 𝐴) → ((𝐹‘𝑋) ≠ 𝑍 ↔ (𝐹‘𝑋) ∈ (V ∖ {𝑍}))) |
14 | 13 | pm5.32da 578 | . . . . . . . 8 ⊢ (𝜑 → ((𝑋 ∈ 𝐴 ∧ (𝐹‘𝑋) ≠ 𝑍) ↔ (𝑋 ∈ 𝐴 ∧ (𝐹‘𝑋) ∈ (V ∖ {𝑍})))) |
15 | 10, 14 | bitrd 278 | . . . . . . 7 ⊢ (𝜑 → (𝑋 ∈ (𝐹 supp 𝑍) ↔ (𝑋 ∈ 𝐴 ∧ (𝐹‘𝑋) ∈ (V ∖ {𝑍})))) |
16 | suppssr.n | . . . . . . . 8 ⊢ (𝜑 → (𝐹 supp 𝑍) ⊆ 𝑊) | |
17 | 16 | sseld 3916 | . . . . . . 7 ⊢ (𝜑 → (𝑋 ∈ (𝐹 supp 𝑍) → 𝑋 ∈ 𝑊)) |
18 | 15, 17 | sylbird 259 | . . . . . 6 ⊢ (𝜑 → ((𝑋 ∈ 𝐴 ∧ (𝐹‘𝑋) ∈ (V ∖ {𝑍})) → 𝑋 ∈ 𝑊)) |
19 | 18 | expdimp 452 | . . . . 5 ⊢ ((𝜑 ∧ 𝑋 ∈ 𝐴) → ((𝐹‘𝑋) ∈ (V ∖ {𝑍}) → 𝑋 ∈ 𝑊)) |
20 | 4, 19 | syl5bir 242 | . . . 4 ⊢ ((𝜑 ∧ 𝑋 ∈ 𝐴) → ((𝐹‘𝑋) ≠ 𝑍 → 𝑋 ∈ 𝑊)) |
21 | 20 | necon1bd 2960 | . . 3 ⊢ ((𝜑 ∧ 𝑋 ∈ 𝐴) → (¬ 𝑋 ∈ 𝑊 → (𝐹‘𝑋) = 𝑍)) |
22 | 21 | impr 454 | . 2 ⊢ ((𝜑 ∧ (𝑋 ∈ 𝐴 ∧ ¬ 𝑋 ∈ 𝑊)) → (𝐹‘𝑋) = 𝑍) |
23 | 1, 22 | sylan2b 593 | 1 ⊢ ((𝜑 ∧ 𝑋 ∈ (𝐴 ∖ 𝑊)) → (𝐹‘𝑋) = 𝑍) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 Vcvv 3422 ∖ cdif 3880 ⊆ wss 3883 {csn 4558 Fn wfn 6413 ⟶wf 6414 ‘cfv 6418 (class class class)co 7255 supp csupp 7948 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-ov 7258 df-oprab 7259 df-mpo 7260 df-supp 7949 |
This theorem is referenced by: fsuppmptif 9088 fsuppco2 9092 fsuppcor 9093 cantnfp1lem1 9366 cantnfp1lem3 9368 cantnflem1 9377 cnfcom2lem 9389 gsumval3 19423 gsumcllem 19424 gsumzaddlem 19437 gsumzmhm 19453 gsumpt 19478 gsum2dlem1 19486 gsum2dlem2 19487 gsum2d 19488 gsumxp2 19496 dprdfinv 19537 dprdfadd 19538 dmdprdsplitlem 19555 dpjidcl 19576 gsumdixp 19763 lcomfsupp 20078 uvcresum 20910 frlmsslsp 20913 psrbaglesuppOLD 21038 psrbagaddclOLD 21042 psrbaglefiOLD 21046 mplsubglem 21115 mpllsslem 21116 mplsubrglem 21120 mplmonmul 21147 mplcoe1 21148 mplcoe5 21151 mplbas2 21153 evlslem4 21194 evlslem2 21199 mhpmulcl 21249 mhpvscacl 21254 rrxcph 24461 rrxmval 24474 rrxmetlem 24476 rrxmet 24477 rrxdstprj1 24478 deg1mul3le 25186 suppovss 30919 elrspunidl 31508 fedgmullem1 31612 eulerpartlemb 32235 evlsbagval 40198 fsuppssindlem1 40203 |
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