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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 15174 |
. . . . 5
|
| 3 | 2 | ad2ant2r 513 |
. . . 4
|
| 4 | neitx.y |
. . . . . 6
| |
| 5 | 4 | neii1 15174 |
. . . . 5
|
| 6 | 5 | ad2ant2l 512 |
. . . 4
|
| 7 | xpss12 4880 |
. . . 4
| |
| 8 | 3, 6, 7 | syl2anc 415 |
. . 3
|
| 9 | 1, 4 | txuni 15290 |
. . . 4
|
| 10 | 9 | adantr 276 |
. . 3
|
| 11 | 8, 10 | sseqtrd 3286 |
. 2
|
| 12 | simp-5l 549 |
. . . . . 6
| |
| 13 | simp-4r 548 |
. . . . . 6
| |
| 14 | simplr 533 |
. . . . . 6
| |
| 15 | txopn 15292 |
. . . . . 6
| |
| 16 | 12, 13, 14, 15 | syl12anc 1276 |
. . . . 5
|
| 17 | simpr1l 1085 |
. . . . . . 7
| |
| 18 | 17 | 3anassrs 1260 |
. . . . . 6
|
| 19 | simprl 535 |
. . . . . 6
| |
| 20 | xpss12 4880 |
. . . . . 6
| |
| 21 | 18, 19, 20 | syl2anc 415 |
. . . . 5
|
| 22 | simpr1r 1086 |
. . . . . . 7
| |
| 23 | 22 | 3anassrs 1260 |
. . . . . 6
|
| 24 | simprr 537 |
. . . . . 6
| |
| 25 | xpss12 4880 |
. . . . . 6
| |
| 26 | 23, 24, 25 | syl2anc 415 |
. . . . 5
|
| 27 | sseq2 3272 |
. . . . . . 7
| |
| 28 | sseq1 3271 |
. . . . . . 7
| |
| 29 | 27, 28 | anbi12d 477 |
. . . . . 6
|
| 30 | 29 | rspcev 2929 |
. . . . 5
|
| 31 | 16, 21, 26, 30 | syl12anc 1276 |
. . . 4
|
| 32 | neii2 15176 |
. . . . . 6
| |
| 33 | 32 | ad2ant2l 512 |
. . . . 5
|
| 34 | 33 | ad2antrr 492 |
. . . 4
|
| 35 | 31, 34 | r19.29a 2694 |
. . 3
|
| 36 | neii2 15176 |
. . . 4
| |
| 37 | 36 | ad2ant2r 513 |
. . 3
|
| 38 | 35, 37 | r19.29a 2694 |
. 2
|
| 39 | txtop 15287 |
. . . 4
| |
| 40 | 39 | adantr 276 |
. . 3
|
| 41 | 1 | neiss2 15169 |
. . . . . 6
|
| 42 | 41 | ad2ant2r 513 |
. . . . 5
|
| 43 | 4 | neiss2 15169 |
. . . . . 6
|
| 44 | 43 | ad2ant2l 512 |
. . . . 5
|
| 45 | xpss12 4880 |
. . . . 5
| |
| 46 | 42, 44, 45 | syl2anc 415 |
. . . 4
|
| 47 | 46, 10 | sseqtrd 3286 |
. . 3
|
| 48 | eqid 2238 |
. . . 4
| |
| 49 | 48 | isnei 15171 |
. . 3
|
| 50 | 40, 47, 49 | syl2anc 415 |
. 2
|
| 51 | 11, 38, 50 | mpbir2and 957 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4244 ax-sep 4247 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-iun 4012 df-br 4129 df-opab 4191 df-mpt 4192 df-id 4436 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-ima 4785 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 df-fv 5383 df-ov 6081 df-oprab 6082 df-mpo 6083 df-1st 6367 df-2nd 6368 df-topgen 13594 df-top 15025 df-topon 15038 df-bases 15070 df-nei 15166 df-tx 15280 |
| This theorem is referenced by: (None) |
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