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Mirrors > Home > ILE Home > Th. List > eltx | Unicode version |
Description: A set in a product is open iff each point is surrounded by an open rectangle. (Contributed by Stefan O'Rear, 25-Jan-2015.) |
Ref | Expression |
---|---|
eltx |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2165 | . . . 4 | |
2 | 1 | txval 12895 | . . 3 |
3 | 2 | eleq2d 2236 | . 2 |
4 | 1 | txbasex 12897 | . . . 4 |
5 | eltg2b 12694 | . . . 4 | |
6 | 4, 5 | syl 14 | . . 3 |
7 | vex 2729 | . . . . . . 7 | |
8 | vex 2729 | . . . . . . 7 | |
9 | 7, 8 | xpex 4719 | . . . . . 6 |
10 | 9 | rgen2w 2522 | . . . . 5 |
11 | eqid 2165 | . . . . . 6 | |
12 | eleq2 2230 | . . . . . . 7 | |
13 | sseq1 3165 | . . . . . . 7 | |
14 | 12, 13 | anbi12d 465 | . . . . . 6 |
15 | 11, 14 | rexrnmpo 5957 | . . . . 5 |
16 | 10, 15 | ax-mp 5 | . . . 4 |
17 | 16 | ralbii 2472 | . . 3 |
18 | 6, 17 | bitrdi 195 | . 2 |
19 | 3, 18 | bitrd 187 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wb 104 wceq 1343 wcel 2136 wral 2444 wrex 2445 cvv 2726 wss 3116 cxp 4602 crn 4605 cfv 5188 (class class class)co 5842 cmpo 5844 ctg 12571 ctx 12892 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-ral 2449 df-rex 2450 df-reu 2451 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-id 4271 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-ov 5845 df-oprab 5846 df-mpo 5847 df-1st 6108 df-2nd 6109 df-topgen 12577 df-tx 12893 |
This theorem is referenced by: txdis 12917 txdis1cn 12918 |
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