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| Mirrors > Home > MPE Home > Th. List > strfvnd | Structured version Visualization version GIF version | ||
| Description: Deduction version of strfvn 17393. (Contributed by Mario Carneiro, 15-Nov-2014.) |
| Ref | Expression |
|---|---|
| strfvnd.c | ⊢ 𝐸 = Slot 𝑁 |
| strfvnd.f | ⊢ (𝜑 → 𝑆 ∈ 𝑉) |
| Ref | Expression |
|---|---|
| strfvnd | ⊢ (𝜑 → (𝐸‘𝑆) = (𝑆‘𝑁)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | strfvnd.f | . 2 ⊢ (𝜑 → 𝑆 ∈ 𝑉) | |
| 2 | elex 3475 | . 2 ⊢ (𝑆 ∈ 𝑉 → 𝑆 ∈ V) | |
| 3 | fveq1 6907 | . . 3 ⊢ (𝑥 = 𝑆 → (𝑥‘𝑁) = (𝑆‘𝑁)) | |
| 4 | strfvnd.c | . . . 4 ⊢ 𝐸 = Slot 𝑁 | |
| 5 | df-slot 17389 | . . . 4 ⊢ Slot 𝑁 = (𝑥 ∈ V ↦ (𝑥‘𝑁)) | |
| 6 | 4, 5 | eqtri 2786 | . . 3 ⊢ 𝐸 = (𝑥 ∈ V ↦ (𝑥‘𝑁)) |
| 7 | fvex 6921 | . . 3 ⊢ (𝑆‘𝑁) ∈ V | |
| 8 | 3, 6, 7 | fvmpt 7016 | . 2 ⊢ (𝑆 ∈ V → (𝐸‘𝑆) = (𝑆‘𝑁)) |
| 9 | 1, 2, 8 | 3syl 19 | 1 ⊢ (𝜑 → (𝐸‘𝑆) = (𝑆‘𝑁)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2147 Vcvv 3454 ↦ cmpt 5189 ‘cfv 6558 Slot cslot 17388 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pr 5395 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-opab 5171 df-mpt 5190 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-iota 6512 df-fun 6560 df-fv 6566 df-slot 17389 |
| This theorem is used by: strfvn 17393 strfvss 17394 strndxid 17405 setsidvald 17406 strfvd 17407 strfv2d 17408 setsid 17414 setsnid 17415 estrreslem1 18340 edgfndxid 29601 bj-endbase 38429 bj-endcomp 38430 |
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