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| Mirrors > Home > ILE Home > Th. List > funtopon | GIF version | ||
| Description: The class TopOn is a function. (Contributed by BJ, 29-Apr-2021.) |
| Ref | Expression |
|---|---|
| funtopon | ⊢ Fun TopOn |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-topon 14822 | . 2 ⊢ TopOn = (𝑦 ∈ V ↦ {𝑥 ∈ Top ∣ 𝑦 = ∪ 𝑥}) | |
| 2 | 1 | funmpt2 5372 | 1 ⊢ Fun TopOn |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 {crab 2515 Vcvv 2803 ∪ cuni 3898 Fun wfun 5327 Topctop 14808 TopOnctopon 14821 |
| 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-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 |
| 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-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 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-fun 5335 df-topon 14822 |
| This theorem is referenced by: istopon 14824 fntopon 14835 |
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