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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 487 | . . . . . 6 ⊢ (((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) → 𝐹 Fn 𝐴) |
| 4 | simpll 779 | . . . . . 6 ⊢ (((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) → 𝐹 ∈ V) | |
| 5 | simplr 781 | . . . . . 6 ⊢ (((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) → 𝑍 ∈ V) | |
| 6 | elsuppfng 8179 | . . . . . 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 3909 | . . . . . . . . 9 ⊢ (𝑘 ∈ (𝐴 ∖ 𝑊) ↔ (𝑘 ∈ 𝐴 ∧ ¬ 𝑘 ∈ 𝑊)) | |
| 9 | suppss.n | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ 𝑊)) → (𝐹‘𝑘) = 𝑍) | |
| 10 | 9 | adantll 727 | . . . . . . . . 9 ⊢ ((((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) ∧ 𝑘 ∈ (𝐴 ∖ 𝑊)) → (𝐹‘𝑘) = 𝑍) |
| 11 | 8, 10 | sylan2br 607 | . . . . . . . 8 ⊢ ((((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) ∧ (𝑘 ∈ 𝐴 ∧ ¬ 𝑘 ∈ 𝑊)) → (𝐹‘𝑘) = 𝑍) |
| 12 | 11 | expr 462 | . . . . . . 7 ⊢ ((((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) ∧ 𝑘 ∈ 𝐴) → (¬ 𝑘 ∈ 𝑊 → (𝐹‘𝑘) = 𝑍)) |
| 13 | 12 | necon1ad 2973 | . . . . . 6 ⊢ ((((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) ∧ 𝑘 ∈ 𝐴) → ((𝐹‘𝑘) ≠ 𝑍 → 𝑘 ∈ 𝑊)) |
| 14 | 13 | expimpd 459 | . . . . 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 3937 | . . 3 ⊢ (((𝐹 ∈ V ∧ 𝑍 ∈ V) ∧ 𝜑) → (𝐹 supp 𝑍) ⊆ 𝑊) |
| 17 | 16 | ex 418 | . 2 ⊢ ((𝐹 ∈ V ∧ 𝑍 ∈ V) → (𝜑 → (𝐹 supp 𝑍) ⊆ 𝑊)) |
| 18 | supp0prc 8173 | . . . 4 ⊢ (¬ (𝐹 ∈ V ∧ 𝑍 ∈ V) → (𝐹 supp 𝑍) = ∅) | |
| 19 | 0ss 4350 | . . . 4 ⊢ ∅ ⊆ 𝑊 | |
| 20 | 18, 19 | eqsstrdi 3975 | . . 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 |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ≠ wne 2956 Vcvv 3451 ∖ cdif 3896 ⊆ wss 3899 ∅c0 4279 Fn wfn 6532 ⟶wf 6533 ‘cfv 6537 (class class class)co 7418 supp csupp 8170 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pr 5391 ax-un 7749 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-sbc 3740 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-fv 6545 df-ov 7421 df-oprab 7422 df-mpo 7423 df-supp 8171 |
| This theorem is used by: suppofssd 8213 suppcoss 8217 fsuppco2 9388 fsuppcor 9389 cantnfp1lem1 9672 cantnfp1lem3 9674 gsumzaddlem 20128 gsumzmhm 20144 gsum2d2lem 20180 lcomfsupp 21170 frlmssuvc1 22093 frlmsslsp 22095 frlmup2 22098 psrbaglesupp 22223 mvrcl 22292 mplsubglem 22299 mpllsslem 22300 mplsubrglem 22304 evlslem3 22382 mhpvscacl 22468 deg1mul3le 26428 jensen 27309 suppovss 33267 fsuppcurry1 33309 fsuppcurry2 33310 resf1o 33315 suppssnn0 33390 elrgspnlem2 33797 mplvrpmrhm 34172 fedgmullem1 34254 cantnfub 44307 cantnfresb 44310 |
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