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Mirrors > Home > ILE Home > Th. List > baspartn | Unicode version |
Description: A disjoint system of sets is a basis for a topology. (Contributed by Stefan O'Rear, 22-Feb-2015.) |
Ref | Expression |
---|---|
baspartn |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 19 |
. . . . . . . . 9
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2 | pwidg 3529 |
. . . . . . . . 9
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3 | 1, 2 | elind 3266 |
. . . . . . . 8
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4 | elssuni 3772 |
. . . . . . . 8
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5 | 3, 4 | syl 14 |
. . . . . . 7
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6 | inidm 3290 |
. . . . . . . . 9
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7 | ineq2 3276 |
. . . . . . . . 9
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8 | 6, 7 | syl5eqr 2187 |
. . . . . . . 8
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9 | 8 | pweqd 3520 |
. . . . . . . . . 10
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10 | 9 | ineq2d 3282 |
. . . . . . . . 9
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11 | 10 | unieqd 3755 |
. . . . . . . 8
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12 | 8, 11 | sseq12d 3133 |
. . . . . . 7
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13 | 5, 12 | syl5ibcom 154 |
. . . . . 6
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14 | 0ss 3406 |
. . . . . . . 8
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15 | sseq1 3125 |
. . . . . . . 8
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16 | 14, 15 | mpbiri 167 |
. . . . . . 7
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17 | 16 | a1i 9 |
. . . . . 6
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18 | 13, 17 | jaod 707 |
. . . . 5
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19 | 18 | ralimdv 2503 |
. . . 4
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20 | 19 | ralimia 2496 |
. . 3
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21 | 20 | adantl 275 |
. 2
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22 | isbasisg 12250 |
. . 3
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23 | 22 | adantr 274 |
. 2
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24 | 21, 23 | mpbird 166 |
1
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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 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ral 2422 df-rex 2423 df-v 2691 df-dif 3078 df-in 3082 df-ss 3089 df-nul 3369 df-pw 3517 df-uni 3745 df-bases 12249 |
This theorem is referenced by: (None) |
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