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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 4290 | . 2 ⊢ (𝑋 ∈ 𝐵 → ¬ 𝐵 = ∅) | |
| 2 | elbasfv.s | . . . . 5 ⊢ 𝑆 = (𝐹‘𝑍) | |
| 3 | fvprc 6853 | . . . . 5 ⊢ (¬ 𝑍 ∈ V → (𝐹‘𝑍) = ∅) | |
| 4 | 2, 3 | eqtrid 2808 | . . . 4 ⊢ (¬ 𝑍 ∈ V → 𝑆 = ∅) |
| 5 | 4 | fveq2d 6865 | . . 3 ⊢ (¬ 𝑍 ∈ V → (Base‘𝑆) = (Base‘∅)) |
| 6 | elbasfv.b | . . 3 ⊢ 𝐵 = (Base‘𝑆) | |
| 7 | base0 17240 | . . 3 ⊢ ∅ = (Base‘∅) | |
| 8 | 5, 6, 7 | 3eqtr4g 2821 | . 2 ⊢ (¬ 𝑍 ∈ V → 𝐵 = ∅) |
| 9 | 1, 8 | nsyl2 141 | 1 ⊢ (𝑋 ∈ 𝐵 → 𝑍 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 = wceq 1559 ∈ wcel 2141 Vcvv 3453 ∅c0 4283 ‘cfv 6515 Basecbs 17235 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7712 ax-cnex 11122 ax-1cn 11124 ax-addcl 11126 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5538 df-eprel 5543 df-po 5551 df-so 5552 df-fr 5596 df-we 5598 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-pred 6282 df-ord 6343 df-on 6344 df-lim 6345 df-suc 6346 df-iota 6471 df-fun 6517 df-fn 6518 df-f 6519 df-f1 6520 df-fo 6521 df-f1o 6522 df-fv 6523 df-ov 7393 df-om 7841 df-2nd 7965 df-frecs 8255 df-wrecs 8286 df-recs 8335 df-rdg 8374 df-nn 12204 df-slot 17208 df-ndx 17220 df-base 17236 |
| This theorem is referenced by: frmdelbas 18877 symginv 19432 symggen 19500 psgneu 19536 psgnpmtr 19540 frgpcyg 21612 lindfind 21855 q1pval 26202 r1pval 26205 symgsubg 33227 catcisoi 49981 fucoppc 49991 fucoppccic 49994 termcterm2 50095 termcciso 50097 termccisoeu 50098 |
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