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| Mirrors > Home > ILE Home > Th. List > txtop | Unicode version | ||
| Description: The product of two topologies is a topology. (Contributed by Jeff Madsen, 2-Sep-2009.) |
| Ref | Expression |
|---|---|
| txtop |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2238 |
. . 3
| |
| 2 | 1 | txval 15356 |
. 2
|
| 3 | topbas 15168 |
. . . 4
| |
| 4 | topbas 15168 |
. . . 4
| |
| 5 | 1 | txbas 15359 |
. . . 4
|
| 6 | 3, 4, 5 | syl2an 289 |
. . 3
|
| 7 | tgcl 15165 |
. . 3
| |
| 8 | 6, 7 | syl 14 |
. 2
|
| 9 | 2, 8 | eqeltrd 2315 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on 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 4246 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 |
| This proof 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 3715 df-pr 3716 df-op 3718 df-uni 3936 df-iun 4014 df-br 4131 df-opab 4193 df-mpt 4194 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 df-f1 5382 df-fo 5383 df-f1o 5384 df-fv 5385 df-ov 6088 df-oprab 6089 df-mpo 6090 df-1st 6374 df-2nd 6375 df-topgen 13614 df-top 15099 df-bases 15144 df-tx 15354 |
| This theorem is used by: txtopi 15362 txtopon 15363 neitx 15369 imasnopn 15400 limccnp2lem 15777 limccnp2cntop 15778 |
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