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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 21762 | . 2 ⊢ TopOn = (𝑦 ∈ V ↦ {𝑥 ∈ Top ∣ 𝑦 = ∪ 𝑥}) | |
2 | 1 | funmpt2 6397 | 1 ⊢ Fun TopOn |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1543 {crab 3055 Vcvv 3398 ∪ cuni 4805 Fun wfun 6352 Topctop 21744 TopOnctopon 21761 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pr 5307 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ral 3056 df-rab 3060 df-v 3400 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-sn 4528 df-pr 4530 df-op 4534 df-br 5040 df-opab 5102 df-mpt 5121 df-id 5440 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-fun 6360 df-topon 21762 |
This theorem is referenced by: fntopon 21775 toprntopon 21776 |
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