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Mirrors > Home > ILE Home > Th. List > neitx | Unicode version |
Description: The Cartesian product of two neighborhoods is a neighborhood in the product topology. (Contributed by Thierry Arnoux, 13-Jan-2018.) |
Ref | Expression |
---|---|
neitx.x | |
neitx.y |
Ref | Expression |
---|---|
neitx |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | neitx.x | . . . . . 6 | |
2 | 1 | neii1 12688 | . . . . 5 |
3 | 2 | ad2ant2r 501 | . . . 4 |
4 | neitx.y | . . . . . 6 | |
5 | 4 | neii1 12688 | . . . . 5 |
6 | 5 | ad2ant2l 500 | . . . 4 |
7 | xpss12 4705 | . . . 4 | |
8 | 3, 6, 7 | syl2anc 409 | . . 3 |
9 | 1, 4 | txuni 12804 | . . . 4 |
10 | 9 | adantr 274 | . . 3 |
11 | 8, 10 | sseqtrd 3175 | . 2 |
12 | simp-5l 533 | . . . . . 6 | |
13 | simp-4r 532 | . . . . . 6 | |
14 | simplr 520 | . . . . . 6 | |
15 | txopn 12806 | . . . . . 6 | |
16 | 12, 13, 14, 15 | syl12anc 1225 | . . . . 5 |
17 | simpr1l 1043 | . . . . . . 7 | |
18 | 17 | 3anassrs 1218 | . . . . . 6 |
19 | simprl 521 | . . . . . 6 | |
20 | xpss12 4705 | . . . . . 6 | |
21 | 18, 19, 20 | syl2anc 409 | . . . . 5 |
22 | simpr1r 1044 | . . . . . . 7 | |
23 | 22 | 3anassrs 1218 | . . . . . 6 |
24 | simprr 522 | . . . . . 6 | |
25 | xpss12 4705 | . . . . . 6 | |
26 | 23, 24, 25 | syl2anc 409 | . . . . 5 |
27 | sseq2 3161 | . . . . . . 7 | |
28 | sseq1 3160 | . . . . . . 7 | |
29 | 27, 28 | anbi12d 465 | . . . . . 6 |
30 | 29 | rspcev 2825 | . . . . 5 |
31 | 16, 21, 26, 30 | syl12anc 1225 | . . . 4 |
32 | neii2 12690 | . . . . . 6 | |
33 | 32 | ad2ant2l 500 | . . . . 5 |
34 | 33 | ad2antrr 480 | . . . 4 |
35 | 31, 34 | r19.29a 2607 | . . 3 |
36 | neii2 12690 | . . . 4 | |
37 | 36 | ad2ant2r 501 | . . 3 |
38 | 35, 37 | r19.29a 2607 | . 2 |
39 | txtop 12801 | . . . 4 | |
40 | 39 | adantr 274 | . . 3 |
41 | 1 | neiss2 12683 | . . . . . 6 |
42 | 41 | ad2ant2r 501 | . . . . 5 |
43 | 4 | neiss2 12683 | . . . . . 6 |
44 | 43 | ad2ant2l 500 | . . . . 5 |
45 | xpss12 4705 | . . . . 5 | |
46 | 42, 44, 45 | syl2anc 409 | . . . 4 |
47 | 46, 10 | sseqtrd 3175 | . . 3 |
48 | eqid 2164 | . . . 4 | |
49 | 48 | isnei 12685 | . . 3 |
50 | 40, 47, 49 | syl2anc 409 | . 2 |
51 | 11, 38, 50 | mpbir2and 933 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wb 104 wceq 1342 wcel 2135 wrex 2443 wss 3111 cuni 3783 cxp 4596 cfv 5182 (class class class)co 5836 ctop 12536 cnei 12679 ctx 12793 |
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 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-13 2137 ax-14 2138 ax-ext 2146 ax-coll 4091 ax-sep 4094 ax-pow 4147 ax-pr 4181 ax-un 4405 ax-setind 4508 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-fal 1348 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ne 2335 df-ral 2447 df-rex 2448 df-reu 2449 df-rab 2451 df-v 2723 df-sbc 2947 df-csb 3041 df-dif 3113 df-un 3115 df-in 3117 df-ss 3124 df-pw 3555 df-sn 3576 df-pr 3577 df-op 3579 df-uni 3784 df-iun 3862 df-br 3977 df-opab 4038 df-mpt 4039 df-id 4265 df-xp 4604 df-rel 4605 df-cnv 4606 df-co 4607 df-dm 4608 df-rn 4609 df-res 4610 df-ima 4611 df-iota 5147 df-fun 5184 df-fn 5185 df-f 5186 df-f1 5187 df-fo 5188 df-f1o 5189 df-fv 5190 df-ov 5839 df-oprab 5840 df-mpo 5841 df-1st 6100 df-2nd 6101 df-topgen 12513 df-top 12537 df-topon 12550 df-bases 12582 df-nei 12680 df-tx 12794 |
This theorem is referenced by: (None) |
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