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Mirrors > Home > MPE Home > Th. List > elsuppfn | Structured version Visualization version GIF version |
Description: An element of the support of a function with a given domain. (Contributed by AV, 27-May-2019.) |
Ref | Expression |
---|---|
elsuppfn | ⊢ ((𝐹 Fn 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑆 ∈ (𝐹 supp 𝑍) ↔ (𝑆 ∈ 𝑋 ∧ (𝐹‘𝑆) ≠ 𝑍))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | suppvalfn 7956 | . . 3 ⊢ ((𝐹 Fn 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝐹 supp 𝑍) = {𝑖 ∈ 𝑋 ∣ (𝐹‘𝑖) ≠ 𝑍}) | |
2 | 1 | eleq2d 2824 | . 2 ⊢ ((𝐹 Fn 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑆 ∈ (𝐹 supp 𝑍) ↔ 𝑆 ∈ {𝑖 ∈ 𝑋 ∣ (𝐹‘𝑖) ≠ 𝑍})) |
3 | fveq2 6756 | . . . 4 ⊢ (𝑖 = 𝑆 → (𝐹‘𝑖) = (𝐹‘𝑆)) | |
4 | 3 | neeq1d 3002 | . . 3 ⊢ (𝑖 = 𝑆 → ((𝐹‘𝑖) ≠ 𝑍 ↔ (𝐹‘𝑆) ≠ 𝑍)) |
5 | 4 | elrab 3617 | . 2 ⊢ (𝑆 ∈ {𝑖 ∈ 𝑋 ∣ (𝐹‘𝑖) ≠ 𝑍} ↔ (𝑆 ∈ 𝑋 ∧ (𝐹‘𝑆) ≠ 𝑍)) |
6 | 2, 5 | bitrdi 286 | 1 ⊢ ((𝐹 Fn 𝑋 ∧ 𝑋 ∈ 𝑉 ∧ 𝑍 ∈ 𝑊) → (𝑆 ∈ (𝐹 supp 𝑍) ↔ (𝑆 ∈ 𝑋 ∧ (𝐹‘𝑆) ≠ 𝑍))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 {crab 3067 Fn wfn 6413 ‘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: fvn0elsupp 7967 fvn0elsuppb 7968 rexsupp 7969 suppssOLD 7982 suppssr 7983 suppofssd 7990 suppcoss 7994 wemapso2lem 9241 cantnfle 9359 cantnfp1lem2 9367 cantnfp1lem3 9368 cantnfp1 9369 cantnflem1a 9373 cantnflem3 9379 cnfcomlem 9387 cnfcom3 9392 suppssfz 13642 fvdifsupp 30920 ressupprn 30926 fsuppcurry1 30962 fsuppcurry2 30963 fsuppind 40202 finnzfsuppd 41709 mnringmulrcld 41735 fdivmptf 45775 refdivmptf 45776 |
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