MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  f1sng Structured version   Visualization version   GIF version

Theorem f1sng 6865
Description: A singleton of an ordered pair is a one-to-one function. (Contributed by AV, 17-Apr-2021.)
Assertion
Ref Expression
f1sng ((𝐴𝑉𝐵𝑊) → {⟨𝐴, 𝐵⟩}:{𝐴}–1-1𝑊)

Proof of Theorem f1sng
StepHypRef Expression
1 f1osng 6864 . . 3 ((𝐴𝑉𝐵𝑊) → {⟨𝐴, 𝐵⟩}:{𝐴}–1-1-onto→{𝐵})
2 f1of1 6820 . . 3 ({⟨𝐴, 𝐵⟩}:{𝐴}–1-1-onto→{𝐵} → {⟨𝐴, 𝐵⟩}:{𝐴}–1-1→{𝐵})
31, 2syl 18 . 2 ((𝐴𝑉𝐵𝑊) → {⟨𝐴, 𝐵⟩}:{𝐴}–1-1→{𝐵})
4 snssi 4756 . . 3 (𝐵𝑊 → {𝐵} ⊆ 𝑊)
54adantl 486 . 2 ((𝐴𝑉𝐵𝑊) → {𝐵} ⊆ 𝑊)
6 f1ss 6782 . 2 (({⟨𝐴, 𝐵⟩}:{𝐴}–1-1→{𝐵} ∧ {𝐵} ⊆ 𝑊) → {⟨𝐴, 𝐵⟩}:{𝐴}–1-1𝑊)
73, 5, 6syl2anc 595 1 ((𝐴𝑉𝐵𝑊) → {⟨𝐴, 𝐵⟩}:{𝐴}–1-1𝑊)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400  wcel 2149  wss 3913  {csn 4594  cop 4600  1-1wf1 6534  1-1-ontowf1o 6536
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-ext 2741  ax-sep 5261  ax-pr 5405
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-sb 2098  df-mo 2573  df-clab 2748  df-cleq 2761  df-clel 2844  df-ral 3086  df-rex 3096  df-rab 3424  df-v 3465  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4493  df-sn 4595  df-pr 4597  df-op 4601  df-br 5114  df-opab 5178  df-id 5557  df-xp 5668  df-rel 5669  df-cnv 5670  df-co 5671  df-dm 5672  df-rn 5673  df-fun 6539  df-fn 6540  df-f 6541  df-f1 6542  df-fo 6543  df-f1o 6544
This theorem is referenced by:  fsnd  6866  uspgr1e  29534  0wlkons1  30412  f1sn2g  49513
  Copyright terms: Public domain W3C validator