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| Mirrors > Home > MPE Home > Th. List > elbasfv | Structured version Visualization version GIF version | ||
| Description: Utility theorem: reverse closure for any structure defined as a function. (Contributed by Stefan O'Rear, 24-Aug-2015.) |
| Ref | Expression |
|---|---|
| elbasfv.s | ⊢ 𝑆 = (𝐹‘𝑍) |
| elbasfv.b | ⊢ 𝐵 = (Base‘𝑆) |
| Ref | Expression |
|---|---|
| elbasfv | ⊢ (𝑋 ∈ 𝐵 → 𝑍 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | n0i 4295 | . 2 ⊢ (𝑋 ∈ 𝐵 → ¬ 𝐵 = ∅) | |
| 2 | elbasfv.s | . . . . 5 ⊢ 𝑆 = (𝐹‘𝑍) | |
| 3 | fvprc 6863 | . . . . 5 ⊢ (¬ 𝑍 ∈ V → (𝐹‘𝑍) = ∅) | |
| 4 | 2, 3 | eqtrid 2812 | . . . 4 ⊢ (¬ 𝑍 ∈ V → 𝑆 = ∅) |
| 5 | 4 | fveq2d 6875 | . . 3 ⊢ (¬ 𝑍 ∈ V → (Base‘𝑆) = (Base‘∅)) |
| 6 | elbasfv.b | . . 3 ⊢ 𝐵 = (Base‘𝑆) | |
| 7 | base0 17262 | . . 3 ⊢ ∅ = (Base‘∅) | |
| 8 | 5, 6, 7 | 3eqtr4g 2825 | . 2 ⊢ (¬ 𝑍 ∈ V → 𝐵 = ∅) |
| 9 | 1, 8 | nsyl2 142 | 1 ⊢ (𝑋 ∈ 𝐵 → 𝑍 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 = wceq 1563 ∈ wcel 2145 Vcvv 3457 ∅c0 4288 ‘cfv 6525 Basecbs 17257 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5250 ax-nul 5260 ax-pow 5326 ax-pr 5394 ax-un 7722 ax-cnex 11144 ax-1cn 11146 ax-addcl 11148 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3080 df-rex 3090 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-pss 3927 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-iun 4953 df-br 5105 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 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-pred 6291 df-ord 6352 df-on 6353 df-lim 6354 df-suc 6355 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-ov 7403 df-om 7851 df-2nd 7975 df-frecs 8266 df-wrecs 8297 df-recs 8346 df-rdg 8385 df-nn 12222 df-slot 17230 df-ndx 17242 df-base 17258 |
| This theorem is referenced by: frmdelbas 18900 symginv 19460 symggen 19528 psgneu 19564 psgnpmtr 19568 frgpcyg 21680 lindfind 21923 q1pval 26269 r1pval 26272 symgsubg 33315 catcisoi 50030 fucoppc 50040 fucoppccic 50043 termcterm2 50144 termcciso 50146 termccisoeu 50147 |
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