Theorem eldm2 5244

Description: Membership in a domain. Theorem 4 of [Suppes] p. 59. (Contributed by NM, 1-Aug-1994.)

Hypothesis

Ref	Expression
eldm.1	⊢ 𝐴 ∈ V

Assertion

Ref	Expression
eldm2	⊢ (𝐴 ∈ dom 𝐵 ↔ ∃𝑦⟨𝐴, 𝑦⟩ ∈ 𝐵)

Distinct variable groups:   𝑦,𝐴   𝑦,𝐵

Proof of Theorem eldm2

Step	Hyp	Ref	Expression
1		eldm.1	. 2 ⊢ 𝐴 ∈ V
2		eldm2g 5242	. 2 ⊢ (𝐴 ∈ V → (𝐴 ∈ dom 𝐵 ↔ ∃𝑦⟨𝐴, 𝑦⟩ ∈ 𝐵))
3	1, 2	ax-mp 5	1 ⊢ (𝐴 ∈ dom 𝐵 ↔ ∃𝑦⟨𝐴, 𝑦⟩ ∈ 𝐵)

Syntax hints:   ↔ wb 195  ∃wex 1695   ∈ wcel 1977  Vcvv 3173  ⟨cop 4131  dom cdm 5038

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-rab 2905  df-v 3175  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-sn 4126  df-pr 4128  df-op 4132  df-br 4584  df-dm 5048

This theorem is referenced by:  dmss  5245  opeldm  5250  dmin  5254  dmiun  5255  dmuni  5256  dm0  5260  reldm0  5264  dmrnssfld  5305  dmcoss  5306  dmcosseq  5308  dmres  5339  iss  5367  dmsnopg  5524  relssdmrn  5573  funssres  5844  dmfco  6182  fun11iun  7019  wfrlem12  7313  axdc3lem2  9156  gsum2d2  18196  cnlnssadj  28323  prsdm  29288  eldm3  30905  dfdm5  30921  frrlem11  31036