Theorem opelxp1 5668

Description: The first member of an ordered pair of classes in a Cartesian product belongs to first Cartesian product argument. (Contributed by NM, 28-May-2008.) (Revised by Mario Carneiro, 26-Apr-2015.)

Assertion

Ref	Expression
opelxp1	⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐶 × 𝐷) → 𝐴 ∈ 𝐶)

Proof of Theorem opelxp1

Step	Hyp	Ref	Expression
1		opelxp 5662	. 2 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐶 × 𝐷) ↔ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷))
2	1	simplbi 496	1 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐶 × 𝐷) → 𝐴 ∈ 𝐶)

Syntax hints:   → wi 4   ∈ wcel 2114  ⟨cop 4574   × cxp 5624

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2709  ax-sep 5232  ax-pr 5372

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-ral 3053  df-rex 3063  df-rab 3391  df-v 3432  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4275  df-if 4468  df-sn 4569  df-pr 4571  df-op 4575  df-opab 5149  df-xp 5632

This theorem is referenced by:  otelxp1  5671  dff3  7048  ressnop0  7102  swoord1  8671  swoord2  8672  isfin4p1  10232  canthp1lem2  10571  ciclcl  17764  txcmplem1  23620  txlm  23627  dvbsss  25883  nvvcop  30684  nvvop  30699  fldextfld1  33811  prsdm  34078  linedegen  36345  bj-opelresdm  37479  bj-idres  37494  opelopab3  38057  et-ltneverrefl  47321  natglobalincr  47327  fuco1  49812  fuco2  49814  fucoid2  49840  fucocolem2  49845  reldmlan2  50108  reldmran2  50109  lanrcl  50112  ranrcl  50113