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Mirrors > Home > MPE Home > Th. List > 1stcclb | Structured version Visualization version Unicode version |
Description: A property of points in a first-countable topology. (Contributed by Jeff Hankins, 22-Aug-2009.) |
Ref | Expression |
---|---|
1stcclb.1 |
Ref | Expression |
---|---|
1stcclb |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1stcclb.1 | . . . 4 | |
2 | 1 | is1stc2 21245 | . . 3 |
3 | 2 | simprbi 480 | . 2 |
4 | eleq1 2689 | . . . . . . 7 | |
5 | eleq1 2689 | . . . . . . . . 9 | |
6 | 5 | anbi1d 741 | . . . . . . . 8 |
7 | 6 | rexbidv 3052 | . . . . . . 7 |
8 | 4, 7 | imbi12d 334 | . . . . . 6 |
9 | 8 | ralbidv 2986 | . . . . 5 |
10 | 9 | anbi2d 740 | . . . 4 |
11 | 10 | rexbidv 3052 | . . 3 |
12 | 11 | rspcv 3305 | . 2 |
13 | 3, 12 | mpan9 486 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wa 384 wceq 1483 wcel 1990 wral 2912 wrex 2913 wss 3574 cpw 4158 cuni 4436 class class class wbr 4653 com 7065 cdom 7953 ctop 20698 c1stc 21240 |
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-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-in 3581 df-ss 3588 df-pw 4160 df-uni 4437 df-1stc 21242 |
This theorem is referenced by: 1stcfb 21248 1stcrest 21256 lly1stc 21299 tx1stc 21453 |
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