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Mirrors > Home > MPE Home > Th. List > ist0-2 | Structured version Visualization version Unicode version |
Description: The predicate "is a T0 space". (Contributed by Mario Carneiro, 24-Aug-2015.) |
Ref | Expression |
---|---|
ist0-2 | TopOn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | topontop 20718 | . . 3 TopOn | |
2 | eqid 2622 | . . . . 5 | |
3 | 2 | ist0 21124 | . . . 4 |
4 | 3 | baib 944 | . . 3 |
5 | 1, 4 | syl 17 | . 2 TopOn |
6 | toponuni 20719 | . . 3 TopOn | |
7 | 6 | raleqdv 3144 | . . 3 TopOn |
8 | 6, 7 | raleqbidv 3152 | . 2 TopOn |
9 | 5, 8 | bitr4d 271 | 1 TopOn |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wcel 1990 wral 2912 cuni 4436 cfv 5888 ctop 20698 TopOnctopon 20715 ct0 21110 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-sbc 3436 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-iota 5851 df-fun 5890 df-fv 5896 df-topon 20716 df-t0 21117 |
This theorem is referenced by: ist0-3 21149 t1t0 21152 ist0-4 21532 kqt0lem 21539 tgpt0 21922 onsuct0 32440 |
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