| Metamath Proof Explorer |
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Related theorems Unicode version |
| Description: Two ways to say that a subset has an empty interior. |
| Ref | Expression |
|---|---|
| clscld.1 |
|
| Ref | Expression |
|---|---|
| ntreq0 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | clscld.1 |
. . . 4
| |
| 2 | 1 | ntrval 7618 |
. . 3
|
| 3 | 2 | eqeq1d 1475 |
. 2
|
| 4 | elunirab 2504 |
. . . . . . 7
| |
| 5 | 4 | negbii 187 |
. . . . . 6
|
| 6 | noel 2274 |
. . . . . . 7
| |
| 7 | bibif 679 |
. . . . . . 7
| |
| 8 | 6, 7 | ax-mp 7 |
. . . . . 6
|
| 9 | ralnex 1645 |
. . . . . 6
| |
| 10 | 5, 8, 9 | 3bitr4 183 |
. . . . 5
|
| 11 | 10 | albii 996 |
. . . 4
|
| 12 | dfcleq 1463 |
. . . 4
| |
| 13 | ralcom4 1814 |
. . . 4
| |
| 14 | 11, 12, 13 | 3bitr4 183 |
. . 3
|
| 15 | n0 2279 |
. . . . . . 7
| |
| 16 | 15 | imbi1i 186 |
. . . . . 6
|
| 17 | 19.23v 1288 |
. . . . . 6
| |
| 18 | imnan 242 |
. . . . . . 7
| |
| 19 | 18 | albii 996 |
. . . . . 6
|
| 20 | 16, 17, 19 | 3bitr2r 180 |
. . . . 5
|
| 21 | pm4.1 164 |
. . . . 5
| |
| 22 | 20, 21 | bitr4 176 |
. . . 4
|
| 23 | 22 | ralbii 1659 |
. . 3
|
| 24 | 14, 23 | bitr 173 |
. 2
|
| 25 | 3, 24 | syl6bb 534 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: bcthlem7 7939 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-9 962 ax-10 963 ax-11 964 ax-12 965 ax-13 966 ax-14 967 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 ax-rep 2683 ax-sep 2693 ax-pow 2732 ax-pr 2769 ax-un 2857 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 978 df-sb 1168 df-eu 1375 df-mo 1376 df-clab 1457 df-cleq 1462 df-clel 1465 df-ne 1579 df-ral 1641 df-rex 1642 df-rab 1644 df-v 1803 df-dif 2039 df-un 2040 df-in 2041 df-ss 2043 df-nul 2271 df-pw 2392 df-sn 2402 df-pr 2403 df-op 2406 df-uni 2494 df-br 2610 df-opab 2657 df-id 2824 df-xp 3174 df-rel 3175 df-cnv 3176 df-co 3177 df-dm 3178 df-rn 3179 df-res 3180 df-ima 3181 df-fun 3182 df-fn 3183 df-fv 3188 df-ntr 7606 |