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| Mirrors > Home > MPE Home > Th. List > strfvnd | Structured version Visualization version GIF version | ||
| Description: Deduction version of strfvn 17271. (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 3479 | . 2 ⊢ (𝑆 ∈ 𝑉 → 𝑆 ∈ V) | |
| 3 | fveq1 6887 | . . 3 ⊢ (𝑥 = 𝑆 → (𝑥‘𝑁) = (𝑆‘𝑁)) | |
| 4 | strfvnd.c | . . . 4 ⊢ 𝐸 = Slot 𝑁 | |
| 5 | df-slot 17267 | . . . 4 ⊢ Slot 𝑁 = (𝑥 ∈ V ↦ (𝑥‘𝑁)) | |
| 6 | 4, 5 | eqtri 2789 | . . 3 ⊢ 𝐸 = (𝑥 ∈ V ↦ (𝑥‘𝑁)) |
| 7 | fvex 6901 | . . 3 ⊢ (𝑆‘𝑁) ∈ V | |
| 8 | 3, 6, 7 | fvmpt 6996 | . 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 2146 Vcvv 3458 ↦ cmpt 5197 ‘cfv 6543 Slot cslot 17266 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-nul 5274 ax-pr 5409 |
| 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 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-ral 3083 df-rex 3093 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-br 5115 df-opab 5179 df-mpt 5198 df-id 5561 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-iota 6499 df-fun 6545 df-fv 6551 df-slot 17267 |
| This theorem is used by: strfvn 17271 strfvss 17272 strndxid 17283 setsidvald 17284 strfvd 17285 strfv2d 17286 setsid 17292 setsnid 17293 estrreslem1 18218 edgfndxid 29380 bj-endbase 38001 bj-endcomp 38002 |
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