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| Mirrors > Home > ILE Home > Th. List > slotslfn | GIF version | ||
| Description: A slot is a function on sets, treated as structures. (Contributed by Mario Carneiro, 22-Sep-2015.) (Revised by Jim Kingdon, 10-Feb-2023.) |
| Ref | Expression |
|---|---|
| slotslfn.e | ⊢ (𝐸 = Slot (𝐸‘ndx) ∧ (𝐸‘ndx) ∈ ℕ) |
| Ref | Expression |
|---|---|
| slotslfn | ⊢ 𝐸 Fn V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 2779 | . . 3 ⊢ 𝑥 ∈ V | |
| 2 | slotslfn.e | . . . 4 ⊢ (𝐸 = Slot (𝐸‘ndx) ∧ (𝐸‘ndx) ∈ ℕ) | |
| 3 | 2 | simpri 113 | . . 3 ⊢ (𝐸‘ndx) ∈ ℕ |
| 4 | 1, 3 | fvex 5619 | . 2 ⊢ (𝑥‘(𝐸‘ndx)) ∈ V |
| 5 | 2 | simpli 111 | . . 3 ⊢ 𝐸 = Slot (𝐸‘ndx) |
| 6 | df-slot 12951 | . . 3 ⊢ Slot (𝐸‘ndx) = (𝑥 ∈ V ↦ (𝑥‘(𝐸‘ndx))) | |
| 7 | 5, 6 | eqtri 2228 | . 2 ⊢ 𝐸 = (𝑥 ∈ V ↦ (𝑥‘(𝐸‘ndx))) |
| 8 | 4, 7 | fnmpti 5424 | 1 ⊢ 𝐸 Fn V |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 = wceq 1373 ∈ wcel 2178 Vcvv 2776 ↦ cmpt 4121 Fn wfn 5285 ‘cfv 5290 ℕcn 9071 ndxcnx 12944 Slot cslot 12946 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2180 ax-14 2181 ax-ext 2189 ax-sep 4178 ax-pow 4234 ax-pr 4269 ax-un 4498 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ral 2491 df-rex 2492 df-v 2778 df-un 3178 df-in 3180 df-ss 3187 df-pw 3628 df-sn 3649 df-pr 3650 df-op 3652 df-uni 3865 df-br 4060 df-opab 4122 df-mpt 4123 df-id 4358 df-xp 4699 df-rel 4700 df-cnv 4701 df-co 4702 df-dm 4703 df-rn 4704 df-iota 5251 df-fun 5292 df-fn 5293 df-fv 5298 df-slot 12951 |
| This theorem is referenced by: slotex 12974 basfn 13005 topontopn 14624 |
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