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Theorem ltrelpi 7384
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 7367 . 2 <N = ( E ∩ (N × N))
2 inss2 3380 . 2 ( E ∩ (N × N)) ⊆ (N × N)
31, 2eqsstri 3211 1 <N ⊆ (N × N)
Colors of variables: wff set class
Syntax hints:  cin 3152  wss 3153   E cep 4318   × cxp 4657  Ncnpi 7332   <N clti 7335
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 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-ext 2175
This theorem depends on definitions:  df-bi 117  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-v 2762  df-in 3159  df-ss 3166  df-lti 7367
This theorem is referenced by:  ltsonq  7458  caucvgprlemk  7725  caucvgprlem1  7739  caucvgprlem2  7740  caucvgprprlemk  7743  caucvgprprlemval  7748  caucvgprprlem1  7769  caucvgprprlem2  7770  ltrenn  7915
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