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| Mirrors > Home > MPE Home > Th. List > strndxid | Structured version Visualization version GIF version | ||
| Description: The value of a structure component extractor is the value of the corresponding slot of the structure. (Contributed by AV, 13-Mar-2020.) (New usage is discouraged.) Use strfvnd 17098 directly with 𝑁 set to (𝐸‘ndx) if possible. |
| Ref | Expression |
|---|---|
| strndxid.s | ⊢ (𝜑 → 𝑆 ∈ 𝑉) |
| strndxid.e | ⊢ 𝐸 = Slot 𝑁 |
| strndxid.n | ⊢ 𝑁 ∈ ℕ |
| Ref | Expression |
|---|---|
| strndxid | ⊢ (𝜑 → (𝑆‘(𝐸‘ndx)) = (𝐸‘𝑆)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | strndxid.e | . . . 4 ⊢ 𝐸 = Slot 𝑁 | |
| 2 | strndxid.n | . . . 4 ⊢ 𝑁 ∈ ℕ | |
| 3 | 1, 2 | ndxid 17110 | . . 3 ⊢ 𝐸 = Slot (𝐸‘ndx) |
| 4 | strndxid.s | . . 3 ⊢ (𝜑 → 𝑆 ∈ 𝑉) | |
| 5 | 3, 4 | strfvnd 17098 | . 2 ⊢ (𝜑 → (𝐸‘𝑆) = (𝑆‘(𝐸‘ndx))) |
| 6 | 5 | eqcomd 2739 | 1 ⊢ (𝜑 → (𝑆‘(𝐸‘ndx)) = (𝐸‘𝑆)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 ‘cfv 6486 ℕcn 12132 Slot cslot 17094 ndxcnx 17106 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-sep 5236 ax-nul 5246 ax-pow 5305 ax-pr 5372 ax-un 7674 ax-cnex 11069 ax-1cn 11071 ax-addcl 11073 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-ral 3049 df-rex 3058 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4475 df-pw 4551 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-iun 4943 df-br 5094 df-opab 5156 df-mpt 5175 df-tr 5201 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-ov 7355 df-om 7803 df-2nd 7928 df-frecs 8217 df-wrecs 8248 df-recs 8297 df-rdg 8335 df-nn 12133 df-slot 17095 df-ndx 17107 |
| This theorem is referenced by: (None) |
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