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Theorem f1setexg 6941
Description: The set of injections between two sets exists. (Contributed by AV, 14-Aug-2024.)
Assertion
Ref Expression
f1setexg ((𝐴𝑉𝐵𝑊) → {𝑓𝑓:𝐴1-1𝐵} ∈ V)
Distinct variable groups:   𝐴,𝑓   𝐵,𝑓
Allowed substitution hints:   𝑉(𝑓)   𝑊(𝑓)

Proof of Theorem f1setexg
StepHypRef Expression
1 df-f1 5377 . . 3 (𝑓:𝐴1-1𝐵 ↔ (𝑓:𝐴𝐵 ∧ Fun 𝑓))
21abbii 2354 . 2 {𝑓𝑓:𝐴1-1𝐵} = {𝑓 ∣ (𝑓:𝐴𝐵 ∧ Fun 𝑓)}
32fabexg 5574 1 ((𝐴𝑉𝐵𝑊) → {𝑓𝑓:𝐴1-1𝐵} ∈ V)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wcel 2209  {cab 2224  Vcvv 2821  ccnv 4768  Fun wfun 5366  wf 5368  1-1wf1 5369
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-br 4126  df-opab 4188  df-xp 4775  df-rel 4776  df-cnv 4777  df-dm 4779  df-rn 4780  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377
This theorem is referenced by:  hashf1lem1  11263
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