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Theorem ltrelpi 7537
Description: Positive integer 'less than' is a relation on positive integers. (Contributed by NM, 8-Feb-1996.)
Assertion
Ref Expression
ltrelpi <N ⊆ (N × N)

Proof of Theorem ltrelpi
StepHypRef Expression
1 df-lti 7520 . 2 <N = ( E ∩ (N × N))
2 inss2 3426 . 2 ( E ∩ (N × N)) ⊆ (N × N)
31, 2eqsstri 3257 1 <N ⊆ (N × N)
Colors of variables: wff set class
Syntax hints:  cin 3197  wss 3198   E cep 4382   × cxp 4721  Ncnpi 7485   <N clti 7488
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211
This theorem depends on definitions:  df-bi 117  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-v 2802  df-in 3204  df-ss 3211  df-lti 7520
This theorem is referenced by:  ltsonq  7611  caucvgprlemk  7878  caucvgprlem1  7892  caucvgprlem2  7893  caucvgprprlemk  7896  caucvgprprlemval  7901  caucvgprprlem1  7922  caucvgprprlem2  7923  ltrenn  8068
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