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Theorem f1o0 2824
Description: One-to-one onto mapping of the empty set.
Assertion
Ref Expression
f1o0 ∅:∅–1-1-onto→∅

Proof of Theorem f1o0
StepHypRef Expression
1 cleqid 1102 . . 3 ∅ = ∅
21, 1pm3.2i 234 . 2 (∅ = ∅ ∧ ∅ = ∅)
3 f1o00 2823 . 2 (∅:∅–1-1-onto→∅ ↔ (∅ = ∅ ∧ ∅ = ∅))
42, 3mpbir 165 1 ∅:∅–1-1-onto→∅
Colors of variables: wff set class
Syntax hints:   ∧ wa 196   = wceq 1091  ∅c0 1707  –1-1-ontowf1o 2421
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-3an 583  df-ex 679  df-sb 853  df-eu 1009  df-mo 1010  df-clab 1093  df-cleq 1097  df-clel 1099  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-fun 2432  df-fn 2433  df-f 2434  df-f1 2435  df-fo 2436  df-f1o 2437
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