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Mirrors > Home > MPE Home > Th. List > tgfiss | Structured version Visualization version GIF version |
Description: If a subbase is included into a topology, so is the generated topology. (Contributed by FL, 20-Apr-2012.) (Proof shortened by Mario Carneiro, 10-Jan-2015.) |
Ref | Expression |
---|---|
tgfiss | β’ ((π½ β Top β§ π΄ β π½) β (topGenβ(fiβπ΄)) β π½) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fiss 9365 | . . . 4 β’ ((π½ β Top β§ π΄ β π½) β (fiβπ΄) β (fiβπ½)) | |
2 | fitop 22265 | . . . . 5 β’ (π½ β Top β (fiβπ½) = π½) | |
3 | 2 | adantr 482 | . . . 4 β’ ((π½ β Top β§ π΄ β π½) β (fiβπ½) = π½) |
4 | 1, 3 | sseqtrd 3985 | . . 3 β’ ((π½ β Top β§ π΄ β π½) β (fiβπ΄) β π½) |
5 | tgss 22334 | . . 3 β’ ((π½ β Top β§ (fiβπ΄) β π½) β (topGenβ(fiβπ΄)) β (topGenβπ½)) | |
6 | 4, 5 | syldan 592 | . 2 β’ ((π½ β Top β§ π΄ β π½) β (topGenβ(fiβπ΄)) β (topGenβπ½)) |
7 | tgtop 22339 | . . 3 β’ (π½ β Top β (topGenβπ½) = π½) | |
8 | 7 | adantr 482 | . 2 β’ ((π½ β Top β§ π΄ β π½) β (topGenβπ½) = π½) |
9 | 6, 8 | sseqtrd 3985 | 1 β’ ((π½ β Top β§ π΄ β π½) β (topGenβ(fiβπ΄)) β π½) |
Colors of variables: wff setvar class |
Syntax hints: β wi 4 β§ wa 397 = wceq 1542 β wcel 2107 β wss 3911 βcfv 6497 ficfi 9351 topGenctg 17324 Topctop 22258 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-sep 5257 ax-nul 5264 ax-pow 5321 ax-pr 5385 ax-un 7673 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2941 df-ral 3062 df-rex 3071 df-reu 3353 df-rab 3407 df-v 3446 df-sbc 3741 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3930 df-nul 4284 df-if 4488 df-pw 4563 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4867 df-int 4909 df-br 5107 df-opab 5169 df-mpt 5190 df-tr 5224 df-id 5532 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5589 df-we 5591 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-ima 5647 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6499 df-fn 6500 df-f 6501 df-f1 6502 df-fo 6503 df-f1o 6504 df-fv 6505 df-om 7804 df-1o 8413 df-er 8651 df-en 8887 df-fin 8890 df-fi 9352 df-topgen 17330 df-top 22259 |
This theorem is referenced by: ordtrest 22569 ordtrest2 22571 lecldbas 22586 xkoptsub 23021 xkopt 23022 ordtrestNEW 32559 ordtrest2NEW 32561 topjoin 34883 |
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