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Mirrors > Home > MPE Home > Th. List > txcld | Structured version Visualization version Unicode version |
Description: The product of two closed sets is closed in the product topology. (Contributed by Jeff Madsen, 2-Sep-2009.) (Revised by Mario Carneiro, 3-Sep-2015.) |
Ref | Expression |
---|---|
txcld |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2622 | . . . . 5 | |
2 | 1 | cldss 20833 | . . . 4 |
3 | eqid 2622 | . . . . 5 | |
4 | 3 | cldss 20833 | . . . 4 |
5 | xpss12 5225 | . . . 4 | |
6 | 2, 4, 5 | syl2an 494 | . . 3 |
7 | cldrcl 20830 | . . . 4 | |
8 | cldrcl 20830 | . . . 4 | |
9 | 1, 3 | txuni 21395 | . . . 4 |
10 | 7, 8, 9 | syl2an 494 | . . 3 |
11 | 6, 10 | sseqtrd 3641 | . 2 |
12 | difxp 5558 | . . . 4 | |
13 | 10 | difeq1d 3727 | . . . 4 |
14 | 12, 13 | syl5eqr 2670 | . . 3 |
15 | txtop 21372 | . . . . 5 | |
16 | 7, 8, 15 | syl2an 494 | . . . 4 |
17 | 7 | adantr 481 | . . . . 5 |
18 | 8 | adantl 482 | . . . . 5 |
19 | 1 | cldopn 20835 | . . . . . 6 |
20 | 19 | adantr 481 | . . . . 5 |
21 | 3 | topopn 20711 | . . . . . 6 |
22 | 18, 21 | syl 17 | . . . . 5 |
23 | txopn 21405 | . . . . 5 | |
24 | 17, 18, 20, 22, 23 | syl22anc 1327 | . . . 4 |
25 | 1 | topopn 20711 | . . . . . 6 |
26 | 17, 25 | syl 17 | . . . . 5 |
27 | 3 | cldopn 20835 | . . . . . 6 |
28 | 27 | adantl 482 | . . . . 5 |
29 | txopn 21405 | . . . . 5 | |
30 | 17, 18, 26, 28, 29 | syl22anc 1327 | . . . 4 |
31 | unopn 20708 | . . . 4 | |
32 | 16, 24, 30, 31 | syl3anc 1326 | . . 3 |
33 | 14, 32 | eqeltrrd 2702 | . 2 |
34 | eqid 2622 | . . . 4 | |
35 | 34 | iscld 20831 | . . 3 |
36 | 16, 35 | syl 17 | . 2 |
37 | 11, 33, 36 | mpbir2and 957 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 wceq 1483 wcel 1990 cdif 3571 cun 3572 wss 3574 cuni 4436 cxp 5112 cfv 5888 (class class class)co 6650 ctop 20698 ccld 20820 ctx 21363 |
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-csb 3534 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-iun 4522 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-rn 5125 df-res 5126 df-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-fv 5896 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-1st 7168 df-2nd 7169 df-topgen 16104 df-top 20699 df-topon 20716 df-bases 20750 df-cld 20823 df-tx 21365 |
This theorem is referenced by: txcls 21407 cnmpt2pc 22727 sxbrsigalem3 30334 |
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