| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > strndxid | 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.) |
| 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 13096 | . . 3 ⊢ 𝐸 = Slot (𝐸‘ndx) |
| 4 | strndxid.s | . . 3 ⊢ (𝜑 → 𝑆 ∈ 𝑉) | |
| 5 | 1, 2 | ndxarg 13095 | . . . . 5 ⊢ (𝐸‘ndx) = 𝑁 |
| 6 | 5, 2 | eqeltri 2302 | . . . 4 ⊢ (𝐸‘ndx) ∈ ℕ |
| 7 | 6 | a1i 9 | . . 3 ⊢ (𝜑 → (𝐸‘ndx) ∈ ℕ) |
| 8 | 3, 4, 7 | strnfvnd 13092 | . 2 ⊢ (𝜑 → (𝐸‘𝑆) = (𝑆‘(𝐸‘ndx))) |
| 9 | 8 | eqcomd 2235 | 1 ⊢ (𝜑 → (𝑆‘(𝐸‘ndx)) = (𝐸‘𝑆)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ∈ wcel 2200 ‘cfv 5324 ℕcn 9133 ndxcnx 13069 Slot cslot 13071 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-cnex 8113 ax-resscn 8114 ax-1re 8116 ax-addrcl 8119 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2802 df-sbc 3030 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-int 3927 df-br 4087 df-opab 4149 df-mpt 4150 df-id 4388 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-dm 4733 df-rn 4734 df-res 4735 df-iota 5284 df-fun 5326 df-fv 5332 df-inn 9134 df-ndx 13075 df-slot 13076 |
| This theorem is referenced by: imasbas 13380 imasplusg 13381 imasmulr 13382 |
| Copyright terms: Public domain | W3C validator |