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Mirrors > Home > MPE Home > Th. List > funtopon | Structured version Visualization version 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 22933 | . 2 ⊢ TopOn = (𝑦 ∈ V ↦ {𝑥 ∈ Top ∣ 𝑦 = ∪ 𝑥}) | |
2 | 1 | funmpt2 6607 | 1 ⊢ Fun TopOn |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 {crab 3433 Vcvv 3478 ∪ cuni 4912 Fun wfun 6557 Topctop 22915 TopOnctopon 22932 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-sep 5302 ax-nul 5312 ax-pr 5438 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ral 3060 df-rex 3069 df-rab 3434 df-v 3480 df-dif 3966 df-un 3968 df-ss 3980 df-nul 4340 df-if 4532 df-sn 4632 df-pr 4634 df-op 4638 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5583 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-fun 6565 df-topon 22933 |
This theorem is referenced by: fntopon 22946 toprntopon 22947 |
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