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| Mirrors > Home > MPE Home > Th. List > strfvnd | Structured version Visualization version GIF version | ||
| Description: Deduction version of strfvn 17344. (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 3472 | . 2 ⊢ (𝑆 ∈ 𝑉 → 𝑆 ∈ V) | |
| 3 | fveq1 6876 | . . 3 ⊢ (𝑥 = 𝑆 → (𝑥‘𝑁) = (𝑆‘𝑁)) | |
| 4 | strfvnd.c | . . . 4 ⊢ 𝐸 = Slot 𝑁 | |
| 5 | df-slot 17340 | . . . 4 ⊢ Slot 𝑁 = (𝑥 ∈ V ↦ (𝑥‘𝑁)) | |
| 6 | 4, 5 | eqtri 2784 | . . 3 ⊢ 𝐸 = (𝑥 ∈ V ↦ (𝑥‘𝑁)) |
| 7 | fvex 6890 | . . 3 ⊢ (𝑆‘𝑁) ∈ V | |
| 8 | 3, 6, 7 | fvmpt 6985 | . 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 2145 Vcvv 3451 ↦ cmpt 5186 ‘cfv 6531 Slot cslot 17339 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pr 5391 |
| 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 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-iota 6487 df-fun 6533 df-fv 6539 df-slot 17340 |
| This theorem is used by: strfvn 17344 strfvss 17345 strndxid 17356 setsidvald 17357 strfvd 17358 strfv2d 17359 setsid 17365 setsnid 17366 estrreslem1 18291 edgfndxid 29553 bj-endbase 38205 bj-endcomp 38206 |
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