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Theorem iskgen2 20218
Description: A space is compactly generated iff it contains its image under the compact generator. (Contributed by Mario Carneiro, 20-Mar-2015.)
Assertion
Ref Expression
iskgen2  |-  ( J  e.  ran 𝑘Gen  <->  ( J  e. 
Top  /\  (𝑘Gen `  J
)  C_  J )
)

Proof of Theorem iskgen2
StepHypRef Expression
1 kgentop 20212 . . 3  |-  ( J  e.  ran 𝑘Gen  ->  J  e.  Top )
2 kgenidm 20217 . . . 4  |-  ( J  e.  ran 𝑘Gen  ->  (𝑘Gen `  J
)  =  J )
3 eqimss 3541 . . . 4  |-  ( (𝑘Gen `  J )  =  J  ->  (𝑘Gen `  J )  C_  J )
42, 3syl 16 . . 3  |-  ( J  e.  ran 𝑘Gen  ->  (𝑘Gen `  J
)  C_  J )
51, 4jca 530 . 2  |-  ( J  e.  ran 𝑘Gen  ->  ( J  e.  Top  /\  (𝑘Gen `  J
)  C_  J )
)
6 simpr 459 . . . 4  |-  ( ( J  e.  Top  /\  (𝑘Gen
`  J )  C_  J )  ->  (𝑘Gen `  J )  C_  J
)
7 kgenss 20213 . . . . 5  |-  ( J  e.  Top  ->  J  C_  (𝑘Gen `  J ) )
87adantr 463 . . . 4  |-  ( ( J  e.  Top  /\  (𝑘Gen
`  J )  C_  J )  ->  J  C_  (𝑘Gen `  J ) )
96, 8eqssd 3506 . . 3  |-  ( ( J  e.  Top  /\  (𝑘Gen
`  J )  C_  J )  ->  (𝑘Gen `  J )  =  J )
10 kgenf 20211 . . . . . 6  |- 𝑘Gen : Top --> Top
11 ffn 5713 . . . . . 6  |-  (𝑘Gen : Top --> Top 
-> 𝑘Gen 
Fn  Top )
1210, 11ax-mp 5 . . . . 5  |- 𝑘Gen  Fn  Top
13 fnfvelrn 6004 . . . . 5  |-  ( (𝑘Gen  Fn  Top  /\  J  e. 
Top )  ->  (𝑘Gen `  J )  e.  ran 𝑘Gen )
1412, 13mpan 668 . . . 4  |-  ( J  e.  Top  ->  (𝑘Gen `  J )  e.  ran 𝑘Gen )
1514adantr 463 . . 3  |-  ( ( J  e.  Top  /\  (𝑘Gen
`  J )  C_  J )  ->  (𝑘Gen `  J )  e.  ran 𝑘Gen )
169, 15eqeltrrd 2543 . 2  |-  ( ( J  e.  Top  /\  (𝑘Gen
`  J )  C_  J )  ->  J  e.  ran 𝑘Gen )
175, 16impbii 188 1  |-  ( J  e.  ran 𝑘Gen  <->  ( J  e. 
Top  /\  (𝑘Gen `  J
)  C_  J )
)
Colors of variables: wff setvar class
Syntax hints:    <-> wb 184    /\ wa 367    = wceq 1398    e. wcel 1823    C_ wss 3461   ran crn 4989    Fn wfn 5565   -->wf 5566   ` cfv 5570   Topctop 19564  𝑘Genckgen 20203
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 14915  df-topgen 14936  df-top 19569  df-bases 19571  df-topon 19572  df-cmp 20057  df-kgen 20204
This theorem is referenced by:  iskgen3  20219  llycmpkgen2  20220  1stckgen  20224  txkgen  20322  qtopkgen  20380
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