Theorem dmmpt 6093

Description: The domain of the mapping operation in general. (Contributed by NM, 16-May-1995.) (Revised by Mario Carneiro, 22-Mar-2015.)

Hypothesis

Ref	Expression
dmmpt.1	⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵)

Assertion

Ref	Expression
dmmpt	⊢ dom 𝐹 = {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ V}

Proof of Theorem dmmpt

Step	Hyp	Ref	Expression
1		dfdm4 5763	. 2 ⊢ dom 𝐹 = ran ◡𝐹
2		dfrn4 6058	. 2 ⊢ ran ◡𝐹 = (◡𝐹 “ V)
3		dmmpt.1	. . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵)
4	3	mptpreima 6091	. 2 ⊢ (◡𝐹 “ V) = {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ V}
5	1, 2, 4	3eqtri 2848	1 ⊢ dom 𝐹 = {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ V}

Syntax hints:   = wceq 1533   ∈ wcel 2110  {crab 3142  Vcvv 3494   ↦ cmpt 5145  ^◡ccnv 5553  dom cdm 5554  ran crn 5555   “ cima 5557

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 2157  ax-12 2173  ax-ext 2793  ax-sep 5202  ax-nul 5209  ax-pr 5329

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-rab 3147  df-v 3496  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-sn 4567  df-pr 4569  df-op 4573  df-br 5066  df-opab 5128  df-mpt 5146  df-xp 5560  df-rel 5561  df-cnv 5562  df-dm 5564  df-rn 5565  df-res 5566  df-ima 5567

This theorem is referenced by:  dmmptss  6094  dmmptg  6095  dmmptd  6492  fvmpti  6766  fvmptss  6779  fvmptss2  6792  mptexgf  6984  tz9.12lem3  9217  cardf2  9371  pmtrsn  18646  00lsp  19752  rgrx0ndm  27374  abrexexd  30268  funcnvmpt  30411  mptctf  30452  issibf  31591  rdgprc0  33038  imageval  33391  dmmptdf  41486  dmmptssf  41500  dmmptdf2  41501  dvcosre  42194  itgsinexplem1  42237  stirlinglem14  42371  fvmptrabdm  43491