Theorem predss 6207

Description: The predecessor class of 𝐴 is a subset of 𝐴. (Contributed by Scott Fenton, 2-Feb-2011.)

Assertion

Ref	Expression
predss	⊢ Pred(𝑅, 𝐴, 𝑋) ⊆ 𝐴

Proof of Theorem predss

Step	Hyp	Ref	Expression
1		df-pred 6199	. 2 ⊢ Pred(𝑅, 𝐴, 𝑋) = (𝐴 ∩ (◡𝑅 “ {𝑋}))
2		inss1 4167	. 2 ⊢ (𝐴 ∩ (◡𝑅 “ {𝑋})) ⊆ 𝐴
3	1, 2	eqsstri 3959	1 ⊢ Pred(𝑅, 𝐴, 𝑋) ⊆ 𝐴

Syntax hints:   ∩ cin 3890   ⊆ wss 3891  {csn 4566  ^◡ccnv 5587   “ cima 5591  Predcpred 6198

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1801  ax-4 1815  ax-5 1916  ax-6 1974  ax-7 2014  ax-8 2111  ax-9 2119  ax-ext 2710

This theorem depends on definitions:  df-bi 206  df-an 396  df-tru 1544  df-ex 1786  df-sb 2071  df-clab 2717  df-cleq 2731  df-clel 2817  df-v 3432  df-in 3898  df-ss 3908  df-pred 6199

This theorem is referenced by:  fpr3g  8085  frrlem4  8089  frrlem13  8098  fpr1  8103  wfr3g  8122  wfrlem4OLD  8127  wfrlem10OLD  8133  ttrclselem1  9444  trpredlem1  9457  frmin  9490  frr3g  9498  nummin  33042  frpoins3xpg  33766  frpoins3xp3g  33767  xpord2pred  33771  xpord3pred  33777  wsuclem  33798