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| Mirrors > Home > ILE Home > Th. List > restfn | GIF version | ||
| Description: The subspace topology operator is a function on pairs. (Contributed by Mario Carneiro, 1-May-2015.) |
| Ref | Expression |
|---|---|
| restfn | ⊢ ↾t Fn (V × V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-rest 13385 | . 2 ⊢ ↾t = (𝑗 ∈ V, 𝑥 ∈ V ↦ ran (𝑦 ∈ 𝑗 ↦ (𝑦 ∩ 𝑥))) | |
| 2 | vex 2806 | . . . 4 ⊢ 𝑗 ∈ V | |
| 3 | 2 | mptex 5890 | . . 3 ⊢ (𝑦 ∈ 𝑗 ↦ (𝑦 ∩ 𝑥)) ∈ V |
| 4 | 3 | rnex 5006 | . 2 ⊢ ran (𝑦 ∈ 𝑗 ↦ (𝑦 ∩ 𝑥)) ∈ V |
| 5 | 1, 4 | fnmpoi 6377 | 1 ⊢ ↾t Fn (V × V) |
| Colors of variables: wff set class |
| Syntax hints: Vcvv 2803 ∩ cin 3200 ↦ cmpt 4155 × cxp 4729 ran crn 4732 Fn wfn 5328 ↾t crest 13383 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4209 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-reu 2518 df-rab 2520 df-v 2805 df-sbc 3033 df-csb 3129 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-iun 3977 df-br 4094 df-opab 4156 df-mpt 4157 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 df-iota 5293 df-fun 5335 df-fn 5336 df-f 5337 df-f1 5338 df-fo 5339 df-f1o 5340 df-fv 5341 df-oprab 6032 df-mpo 6033 df-1st 6312 df-2nd 6313 df-rest 13385 |
| This theorem is referenced by: topnfn 13388 topnvalg 13395 restbasg 14959 tgrest 14960 restco 14965 txrest 15067 |
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