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Theorem kgentop 20209
Description: A compactly generated space is a topology. (Note: henceforth we will use the idiom " J  e.  ran 𝑘Gen " to denote " J is compactly generated", since as we will show a space is compactly generated iff it is in the range of the compact generator.) (Contributed by Mario Carneiro, 20-Mar-2015.)
Assertion
Ref Expression
kgentop  |-  ( J  e.  ran 𝑘Gen  ->  J  e.  Top )

Proof of Theorem kgentop
StepHypRef Expression
1 kgenf 20208 . . 3  |- 𝑘Gen : Top --> Top
2 frn 5719 . . 3  |-  (𝑘Gen : Top --> Top 
->  ran 𝑘Gen  C_  Top )
31, 2ax-mp 5 . 2  |-  ran 𝑘Gen  C_  Top
43sseli 3485 1  |-  ( J  e.  ran 𝑘Gen  ->  J  e.  Top )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    e. wcel 1823    C_ wss 3461   ran crn 4989   -->wf 5566   Topctop 19561  𝑘Genckgen 20200
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1623  ax-4 1636  ax-5 1709  ax-6 1752  ax-7 1795  ax-8 1825  ax-9 1827  ax-10 1842  ax-11 1847  ax-12 1859  ax-13 2004  ax-ext 2432  ax-rep 4550  ax-sep 4560  ax-nul 4568  ax-pow 4615  ax-pr 4676  ax-un 6565
This theorem depends on definitions:  df-bi 185  df-or 368  df-an 369  df-3or 972  df-3an 973  df-tru 1401  df-ex 1618  df-nf 1622  df-sb 1745  df-eu 2288  df-mo 2289  df-clab 2440  df-cleq 2446  df-clel 2449  df-nfc 2604  df-ne 2651  df-ral 2809  df-rex 2810  df-reu 2811  df-rab 2813  df-v 3108  df-sbc 3325  df-csb 3421  df-dif 3464  df-un 3466  df-in 3468  df-ss 3475  df-pss 3477  df-nul 3784  df-if 3930  df-pw 4001  df-sn 4017  df-pr 4019  df-tp 4021  df-op 4023  df-uni 4236  df-int 4272  df-iun 4317  df-br 4440  df-opab 4498  df-mpt 4499  df-tr 4533  df-eprel 4780  df-id 4784  df-po 4789  df-so 4790  df-fr 4827  df-we 4829  df-ord 4870  df-on 4871  df-lim 4872  df-suc 4873  df-xp 4994  df-rel 4995  df-cnv 4996  df-co 4997  df-dm 4998  df-rn 4999  df-res 5000  df-ima 5001  df-iota 5534  df-fun 5572  df-fn 5573  df-f 5574  df-f1 5575  df-fo 5576  df-f1o 5577  df-fv 5578  df-ov 6273  df-oprab 6274  df-mpt2 6275  df-om 6674  df-1st 6773  df-2nd 6774  df-recs 7034  df-rdg 7068  df-oadd 7126  df-er 7303  df-en 7510  df-fin 7513  df-fi 7863  df-rest 14912  df-topgen 14933  df-top 19566  df-bases 19568  df-topon 19569  df-cmp 20054  df-kgen 20201
This theorem is referenced by:  kgenidm  20214  iskgen2  20215  kgencn3  20225  txkgen  20319  qtopkgen  20377
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