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| Mirrors > Home > ILE Home > Th. List > neipsm | Unicode version | ||
| Description: A neighborhood of a set is a neighborhood of every point in the set. Proposition 1 of [BourbakiTop1] p. I.2. (Contributed by FL, 16-Nov-2006.) (Revised by Jim Kingdon, 22-Mar-2023.) |
| Ref | Expression |
|---|---|
| neips.1 |
|
| Ref | Expression |
|---|---|
| neipsm |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | snssi 3817 |
. . . . . 6
| |
| 2 | neiss 14873 |
. . . . . 6
| |
| 3 | 1, 2 | syl3an3 1308 |
. . . . 5
|
| 4 | 3 | 3exp 1228 |
. . . 4
|
| 5 | 4 | ralrimdv 2611 |
. . 3
|
| 6 | 5 | 3ad2ant1 1044 |
. 2
|
| 7 | eleq1w 2292 |
. . . . . . 7
| |
| 8 | 7 | cbvexv 1967 |
. . . . . 6
|
| 9 | r19.28mv 3587 |
. . . . . 6
| |
| 10 | 8, 9 | sylbir 135 |
. . . . 5
|
| 11 | 10 | 3ad2ant3 1046 |
. . . 4
|
| 12 | ssrab2 3312 |
. . . . . . . . . 10
| |
| 13 | uniopn 14724 |
. . . . . . . . . 10
| |
| 14 | 12, 13 | mpan2 425 |
. . . . . . . . 9
|
| 15 | 14 | ad2antrr 488 |
. . . . . . . 8
|
| 16 | sseq1 3250 |
. . . . . . . . . . . . . . . 16
| |
| 17 | 16 | elrab 2962 |
. . . . . . . . . . . . . . 15
|
| 18 | elunii 3898 |
. . . . . . . . . . . . . . 15
| |
| 19 | 17, 18 | sylan2br 288 |
. . . . . . . . . . . . . 14
|
| 20 | 19 | an12s 567 |
. . . . . . . . . . . . 13
|
| 21 | 20 | rexlimiva 2645 |
. . . . . . . . . . . 12
|
| 22 | 21 | ralimi 2595 |
. . . . . . . . . . 11
|
| 23 | dfss3 3216 |
. . . . . . . . . . 11
| |
| 24 | 22, 23 | sylibr 134 |
. . . . . . . . . 10
|
| 25 | 24 | adantl 277 |
. . . . . . . . 9
|
| 26 | unissb 3923 |
. . . . . . . . . 10
| |
| 27 | sseq1 3250 |
. . . . . . . . . . . 12
| |
| 28 | 27 | elrab 2962 |
. . . . . . . . . . 11
|
| 29 | 28 | simprbi 275 |
. . . . . . . . . 10
|
| 30 | 26, 29 | mprgbir 2590 |
. . . . . . . . 9
|
| 31 | 25, 30 | jctir 313 |
. . . . . . . 8
|
| 32 | sseq2 3251 |
. . . . . . . . . 10
| |
| 33 | sseq1 3250 |
. . . . . . . . . 10
| |
| 34 | 32, 33 | anbi12d 473 |
. . . . . . . . 9
|
| 35 | 34 | rspcev 2910 |
. . . . . . . 8
|
| 36 | 15, 31, 35 | syl2anc 411 |
. . . . . . 7
|
| 37 | 36 | ex 115 |
. . . . . 6
|
| 38 | 37 | anim2d 337 |
. . . . 5
|
| 39 | 38 | 3adant3 1043 |
. . . 4
|
| 40 | 11, 39 | sylbid 150 |
. . 3
|
| 41 | ssel2 3222 |
. . . . . . 7
| |
| 42 | neips.1 |
. . . . . . . 8
| |
| 43 | 42 | isneip 14869 |
. . . . . . 7
|
| 44 | 41, 43 | sylan2 286 |
. . . . . 6
|
| 45 | 44 | anassrs 400 |
. . . . 5
|
| 46 | 45 | ralbidva 2528 |
. . . 4
|
| 47 | 46 | 3adant3 1043 |
. . 3
|
| 48 | 42 | isnei 14867 |
. . . 4
|
| 49 | 48 | 3adant3 1043 |
. . 3
|
| 50 | 40, 47, 49 | 3imtr4d 203 |
. 2
|
| 51 | 6, 50 | impbid 129 |
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-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-coll 4204 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-reu 2517 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-iun 3972 df-br 4089 df-opab 4151 df-mpt 4152 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-fv 5334 df-top 14721 df-nei 14862 |
| This theorem is referenced by: (None) |
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