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| Mirrors > Home > MPE Home > Th. List > suppss | Structured version Visualization version GIF version | ||
| Description: Show that the support of a function is contained in a set. (Contributed by Mario Carneiro, 19-Dec-2014.) (Revised by AV, 28-May-2019.) (Proof shortened by SN, 5-Aug-2024.) |
| Ref | Expression |
|---|---|
| suppss.f | ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) |
| suppss.n | ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ 𝑊)) → (𝐹‘𝑘) = 𝑍) |
| Ref | Expression |
|---|---|
| suppss | ⊢ (𝜑 → (𝐹 supp 𝑍) ⊆ 𝑊) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | suppss.f | . . . . . . . 8 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) | |
| 2 | 1 | ffnd 6708 | . . . . . . 7 ⊢ (𝜑 → 𝐹 Fn 𝐴) |
| 3 | 2 | adantl 486 | . . . . . 6 ⊢ (((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) → 𝐹 Fn 𝐴) |
| 4 | simpll 778 | . . . . . 6 ⊢ (((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) → 𝐹 ∈ V) | |
| 5 | simplr 780 | . . . . . 6 ⊢ (((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) → 𝑍 ∈ V) | |
| 6 | elsuppfng 8166 | . . . . . 6 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐹 ∈ V ∧ 𝑍 ∈ V) → (𝑘 ∈ (𝐹 supp 𝑍) ↔ (𝑘 ∈ 𝐴 ∧ (𝐹‘𝑘) ≠ 𝑍))) | |
| 7 | 3, 4, 5, 6 | syl3anc 1398 | . . . . 5 ⊢ (((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) → (𝑘 ∈ (𝐹 supp 𝑍) ↔ (𝑘 ∈ 𝐴 ∧ (𝐹‘𝑘) ≠ 𝑍))) |
| 8 | eldif 3916 | . . . . . . . . 9 ⊢ (𝑘 ∈ (𝐴 ∖ 𝑊) ↔ (𝑘 ∈ 𝐴 ∧ ¬ 𝑘 ∈ 𝑊)) | |
| 9 | suppss.n | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ 𝑊)) → (𝐹‘𝑘) = 𝑍) | |
| 10 | 9 | adantll 726 | . . . . . . . . 9 ⊢ ((((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) ∧ 𝑘 ∈ (𝐴 ∖ 𝑊)) → (𝐹‘𝑘) = 𝑍) |
| 11 | 8, 10 | sylan2br 606 | . . . . . . . 8 ⊢ ((((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) ∧ (𝑘 ∈ 𝐴 ∧ ¬ 𝑘 ∈ 𝑊)) → (𝐹‘𝑘) = 𝑍) |
| 12 | 11 | expr 461 | . . . . . . 7 ⊢ ((((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) ∧ 𝑘 ∈ 𝐴) → (¬ 𝑘 ∈ 𝑊 → (𝐹‘𝑘) = 𝑍)) |
| 13 | 12 | necon1ad 2975 | . . . . . 6 ⊢ ((((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) ∧ 𝑘 ∈ 𝐴) → ((𝐹‘𝑘) ≠ 𝑍 → 𝑘 ∈ 𝑊)) |
| 14 | 13 | expimpd 458 | . . . . 5 ⊢ (((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) → ((𝑘 ∈ 𝐴 ∧ (𝐹‘𝑘) ≠ 𝑍) → 𝑘 ∈ 𝑊)) |
| 15 | 7, 14 | sylbid 243 | . . . 4 ⊢ (((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) → (𝑘 ∈ (𝐹 supp 𝑍) → 𝑘 ∈ 𝑊)) |
| 16 | 15 | ssrdv 3944 | . . 3 ⊢ (((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) → (𝐹 supp 𝑍) ⊆ 𝑊) |
| 17 | 16 | ex 417 | . 2 ⊢ ((𝐹 ∈ V ∧ 𝑍 ∈ V) → (𝜑 → (𝐹 supp 𝑍) ⊆ 𝑊)) |
| 18 | supp0prc 8160 | . . . 4 ⊢ (¬ (𝐹 ∈ V ∧ 𝑍 ∈ V) → (𝐹 supp 𝑍) = ∅) | |
| 19 | 0ss 4358 | . . . 4 ⊢ ∅ ⊆ 𝑊 | |
| 20 | 18, 19 | eqsstrdi 3982 | . . 3 ⊢ (¬ (𝐹 ∈ V ∧ 𝑍 ∈ V) → (𝐹 supp 𝑍) ⊆ 𝑊) |
| 21 | 20 | a1d 26 | . 2 ⊢ (¬ (𝐹 ∈ V ∧ 𝑍 ∈ V) → (𝜑 → (𝐹 supp 𝑍) ⊆ 𝑊)) |
| 22 | 17, 21 | pm2.61i 184 | 1 ⊢ (𝜑 → (𝐹 supp 𝑍) ⊆ 𝑊) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1570 ∈ wcel 2143 ≠ wne 2958 Vcvv 3455 ∖ cdif 3903 ⊆ wss 3906 ∅c0 4287 Fn wfn 6533 ⟶wf 6534 ‘cfv 6538 (class class class)co 7412 supp csupp 8157 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pr 5406 ax-un 7734 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-sbc 3746 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-fv 6546 df-ov 7415 df-oprab 7416 df-mpo 7417 df-supp 8158 |
| This theorem is referenced by: suppofssd 8200 suppcoss 8204 fsuppco2 9364 fsuppcor 9365 cantnfp1lem1 9648 cantnfp1lem3 9650 gsumzaddlem 19992 gsumzmhm 20008 gsum2d2lem 20044 lcomfsupp 21004 frlmssuvc1 21925 frlmsslsp 21927 frlmup2 21930 psrbaglesupp 22053 mvrcl 22122 mplsubglem 22129 mpllsslem 22130 mplsubrglem 22134 evlslem3 22212 mhpvscacl 22298 deg1mul3le 26255 jensen 27134 suppovss 33007 fsuppcurry1 33050 fsuppcurry2 33051 resf1o 33056 suppssnn0 33131 elrgspnlem2 33544 mplvrpmrhm 33918 fedgmullem1 34000 cantnfub 44031 cantnfresb 44034 |
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