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Mirrors > Home > ILE Home > Th. List > tx2cn | Unicode version |
Description: Continuity of the second projection map of a topological product. (Contributed by Jeff Madsen, 2-Sep-2009.) (Proof shortened by Mario Carneiro, 22-Aug-2015.) |
Ref | Expression |
---|---|
tx2cn |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f2ndres 6066 |
. . 3
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2 | 1 | a1i 9 |
. 2
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3 | ffn 5280 |
. . . . . . . 8
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4 | elpreima 5547 |
. . . . . . . 8
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5 | 1, 3, 4 | mp2b 8 |
. . . . . . 7
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6 | fvres 5453 |
. . . . . . . . . 10
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7 | 6 | eleq1d 2209 |
. . . . . . . . 9
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8 | 1st2nd2 6081 |
. . . . . . . . . 10
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
9 | xp1st 6071 |
. . . . . . . . . 10
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
10 | elxp6 6075 |
. . . . . . . . . . . 12
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11 | anass 399 |
. . . . . . . . . . . 12
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12 | 10, 11 | bitr4i 186 |
. . . . . . . . . . 11
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13 | 12 | baib 905 |
. . . . . . . . . 10
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14 | 8, 9, 13 | syl2anc 409 |
. . . . . . . . 9
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15 | 7, 14 | bitr4d 190 |
. . . . . . . 8
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16 | 15 | pm5.32i 450 |
. . . . . . 7
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17 | 5, 16 | bitri 183 |
. . . . . 6
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18 | toponss 12232 |
. . . . . . . . . 10
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
19 | 18 | adantll 468 |
. . . . . . . . 9
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20 | xpss2 4658 |
. . . . . . . . 9
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21 | 19, 20 | syl 14 |
. . . . . . . 8
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22 | 21 | sseld 3101 |
. . . . . . 7
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23 | 22 | pm4.71rd 392 |
. . . . . 6
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24 | 17, 23 | bitr4id 198 |
. . . . 5
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25 | 24 | eqrdv 2138 |
. . . 4
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26 | toponmax 12231 |
. . . . . 6
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27 | txopn 12473 |
. . . . . . 7
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28 | 27 | expr 373 |
. . . . . 6
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29 | 26, 28 | mpidan 420 |
. . . . 5
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30 | 29 | imp 123 |
. . . 4
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31 | 25, 30 | eqeltrd 2217 |
. . 3
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32 | 31 | ralrimiva 2508 |
. 2
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33 | txtopon 12470 |
. . 3
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34 | iscn 12405 |
. . 3
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35 | 33, 34 | sylancom 417 |
. 2
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36 | 2, 32, 35 | mpbir2and 929 |
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-13 1492 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-coll 4051 ax-sep 4054 ax-pow 4106 ax-pr 4139 ax-un 4363 ax-setind 4460 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ne 2310 df-ral 2422 df-rex 2423 df-reu 2424 df-rab 2426 df-v 2691 df-sbc 2914 df-csb 3008 df-dif 3078 df-un 3080 df-in 3082 df-ss 3089 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-uni 3745 df-iun 3823 df-br 3938 df-opab 3998 df-mpt 3999 df-id 4223 df-xp 4553 df-rel 4554 df-cnv 4555 df-co 4556 df-dm 4557 df-rn 4558 df-res 4559 df-ima 4560 df-iota 5096 df-fun 5133 df-fn 5134 df-f 5135 df-f1 5136 df-fo 5137 df-f1o 5138 df-fv 5139 df-ov 5785 df-oprab 5786 df-mpo 5787 df-1st 6046 df-2nd 6047 df-map 6552 df-topgen 12180 df-top 12204 df-topon 12217 df-bases 12249 df-cn 12396 df-tx 12461 |
This theorem is referenced by: txcn 12483 cnmpt2nd 12497 |
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