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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 4294 | . 2 ⊢ (𝑋 ∈ 𝐵 → ¬ 𝐵 = ∅) | |
| 2 | elbasfv.s | . . . . 5 ⊢ 𝑆 = (𝐹‘𝑍) | |
| 3 | fvprc 6875 | . . . . 5 ⊢ (¬ 𝑍 ∈ V → (𝐹‘𝑍) = ∅) | |
| 4 | 2, 3 | eqtrid 2810 | . . . 4 ⊢ (¬ 𝑍 ∈ V → 𝑆 = ∅) |
| 5 | 4 | fveq2d 6887 | . . 3 ⊢ (¬ 𝑍 ∈ V → (Base‘𝑆) = (Base‘∅)) |
| 6 | elbasfv.b | . . 3 ⊢ 𝐵 = (Base‘𝑆) | |
| 7 | base0 17275 | . . 3 ⊢ ∅ = (Base‘∅) | |
| 8 | 5, 6, 7 | 3eqtr4g 2823 | . 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 1570 ∈ wcel 2143 Vcvv 3455 ∅c0 4287 ‘cfv 6538 Basecbs 17270 |
| 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-pow 5338 ax-pr 5406 ax-un 7734 ax-cnex 11157 ax-1cn 11159 ax-addcl 11161 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 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-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 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-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7415 df-om 7864 df-2nd 7988 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-rdg 8398 df-nn 12235 df-slot 17243 df-ndx 17255 df-base 17271 |
| This theorem is referenced by: frmdelbas 18913 symginv 19473 symggen 19541 psgneu 19577 psgnpmtr 19581 frgpcyg 21704 lindfind 21947 q1pval 26293 r1pval 26296 symgsubg 33388 catcisoi 50161 fucoppc 50171 fucoppccic 50174 termcterm2 50275 termcciso 50277 termccisoeu 50278 |
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