Theorem fexd 41372

Description: If the domain of a mapping is a set, the function is a set. (Contributed by Glauco Siliprandi, 26-Jun-2021.)

Hypotheses

Ref	Expression
fexd.1	⊢ (𝜑 → 𝐹:𝐴⟶𝐵)
fexd.2	⊢ (𝜑 → 𝐴 ∈ 𝐶)

Assertion

Ref	Expression
fexd	⊢ (𝜑 → 𝐹 ∈ V)

Proof of Theorem fexd

Step	Hyp	Ref	Expression
1		fexd.1	. 2 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵)
2		fexd.2	. 2 ⊢ (𝜑 → 𝐴 ∈ 𝐶)
3		fex 6983	. 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V)
4	1, 2, 3	syl2anc 586	1 ⊢ (𝜑 → 𝐹 ∈ V)

Syntax hints:   → wi 4   ∈ wcel 2110  Vcvv 3495  ⟶wf 6346

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2156  ax-12 2172  ax-ext 2793  ax-rep 5183  ax-sep 5196  ax-nul 5203  ax-pr 5322

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-reu 3145  df-rab 3147  df-v 3497  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-iun 4914  df-br 5060  df-opab 5122  df-mpt 5140  df-id 5455  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-rn 5561  df-res 5562  df-ima 5563  df-iota 6309  df-fun 6352  df-fn 6353  df-f 6354  df-f1 6355  df-fo 6356  df-f1o 6357  df-fv 6358

This theorem is referenced by:  limsupval3  41965  limsuppnfdlem  41974  limsupvaluz  41981  limsuppnflem  41983  limsupre2lem  41997  climuzlem  42016  climisp  42019  climxrrelem  42022  climxrre  42023  liminfval5  42038  limsupgtlem  42050  liminfvalxr  42056  liminflelimsupuz  42058  liminfgelimsupuz  42061  liminflimsupclim  42080  liminflbuz2  42088  xlimclim2lem  42112  climxlim2  42119  nsssmfmbflem  43047