MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  f10d Structured version   Visualization version   GIF version

Theorem f10d 6859
Description: The empty set maps one-to-one into any class, deduction version. (Contributed by AV, 25-Nov-2020.)
Hypothesis
Ref Expression
f10d.f (𝜑 → 𝐹 = ∅)
Assertion
Ref Expression
f10d (𝜑 → 𝐹:dom 𝐹–1-1→𝐴)

Proof of Theorem f10d
StepHypRef Expression
1 f10 6858 . . 3 ∅:∅–1-1→𝐴
2 dm0 5901 . . . 4 dom ∅ = ∅
3 f1eq2 6774 . . . 4 (dom ∅ = ∅ → (∅:dom ∅–1-1→𝐴 ↔ ∅:∅–1-1→𝐴))
42, 3ax-mp 5 . . 3 (∅:dom ∅–1-1→𝐴 ↔ ∅:∅–1-1→𝐴)
51, 4mpbir 234 . 2 ∅:dom ∅–1-1→𝐴
6 f10d.f . . 3 (𝜑 → 𝐹 = ∅)
76dmeqd 5886 . . 3 (𝜑 → dom 𝐹 = dom ∅)
8 eqidd 2761 . . 3 (𝜑 → 𝐴 = 𝐴)
96, 7, 8f1eq123d 6816 . 2 (𝜑 → (𝐹:dom 𝐹–1-1→𝐴 ↔ ∅:dom ∅–1-1→𝐴))
105, 9mpbiri 261 1 (𝜑 → 𝐹:dom 𝐹–1-1→𝐴)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ↔ wb 209   = wceq 1569  ∅c0 4278  dom cdm 5650  –1-1→wf1 6535
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-ext 2732  ax-sep 5248  ax-nul 5259  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-sb 2099  df-mo 2564  df-clab 2739  df-cleq 2752  df-clel 2835  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-sn 4585  df-pr 4587  df-op 4835  df-br 5103  df-opab 5167  df-id 5545  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-fun 6540  df-fn 6541  df-f 6542  df-f1 6543
This theorem is used by:  umgr0e  29693  usgr0e  29822
  Copyright terms: Public domain W3C validator