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Theorem f1ovi 2826
Description: The identity relation is a one-to-one onto function on the universe.
Assertion
Ref Expression
f1ovi I:V1-1-ontoV

Proof of Theorem f1ovi
StepHypRef Expression
1 f1oi 2825 . 2 (IV):V1-1-ontoV
2 reli 2500 . . . 4 Rel I
3 resid 2601 . . . 4 (Rel I → (IV) = I)
42, 3ax-mp 6 . . 3 (IV) = I
5 f1oeq1 2795 . . 3 ((IV) = I → ((IV):V1-1-ontoVI:V1-1-ontoV))
64, 5ax-mp 6 . 2 ((IV):V1-1-ontoVI:V1-1-ontoV)
71, 6mpbi 164 1 I:V1-1-ontoV
Colors of variables: wff set class
Syntax hints:   ↔ wb 127   = wceq 1091  Vcvv 1348  Icid 2057   ↾ cres 2412  Rel wrel 2415  –1-1-ontowf1o 2421
This theorem is referenced by:  ncanth 2946
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-6 675  ax-7 676  ax-gen 677  ax-8 798  ax-9 799  ax-10 800  ax-11 801  ax-12 802  ax-13 804  ax-14 805  ax-16 922  ax-17 925  ax-ext 1074  ax-rep 1075  ax-pow 1077
This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-ex 679  df-sb 853  df-eu 1009  df-mo 1010  df-clab 1093  df-cleq 1097  df-clel 1099  df-rex 1206  df-v 1349  df-dif 1489  df-un 1490  df-in 1491  df-ss 1492  df-nul 1708  df-pw 1799  df-sn 1811  df-pr 1812  df-op 1815  df-br 2063  df-opab 2098  df-id 2125  df-xp 2424  df-rel 2425  df-cnv 2426  df-co 2427  df-dm 2428  df-rn 2429  df-res 2430  df-ima 2431  df-fun 2432  df-fn 2433  df-f 2434  df-f1 2435  df-fo 2436  df-f1o 2437
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