ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  sseqin2 GIF version

Theorem sseqin2 3393
Description: A relationship between subclass and intersection. Similar to Exercise 9 of [TakeutiZaring] p. 18. (Contributed by NM, 17-May-1994.)
Assertion
Ref Expression
sseqin2 (𝐴𝐵 ↔ (𝐵𝐴) = 𝐴)

Proof of Theorem sseqin2
StepHypRef Expression
1 dfss1 3378 1 (𝐴𝐵 ↔ (𝐵𝐴) = 𝐴)
Colors of variables: wff set class
Syntax hints:  wb 105   = wceq 1373  cin 3166  wss 3167
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-ext 2188
This theorem depends on definitions:  df-bi 117  df-tru 1376  df-nf 1485  df-sb 1787  df-clab 2193  df-cleq 2199  df-clel 2202  df-nfc 2338  df-v 2775  df-in 3173  df-ss 3180
This theorem is referenced by:  dfss4st  3407  resabs1  4993  mptimass  5040  rescnvcnv  5150  frecfnom  6494  fiintim  7035  nn0supp  9354  uzin  9688  iooval2  10044  fzval2  10140  suprzubdc  10386  bitsinv1  12317  dfphi2  12586  ressabsg  12952  resttopon  14687  restabs  14691  restopnb  14697  txcnmpt  14789
  Copyright terms: Public domain W3C validator