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Theorem ltrelpi 7256
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 7239 . 2 <N = ( E ∩ (N × N))
2 inss2 3338 . 2 ( E ∩ (N × N)) ⊆ (N × N)
31, 2eqsstri 3169 1 <N ⊆ (N × N)
Colors of variables: wff set class
Syntax hints:  cin 3110  wss 3111   E cep 4259   × cxp 4596  Ncnpi 7204   <N clti 7207
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1434  ax-7 1435  ax-gen 1436  ax-ie1 1480  ax-ie2 1481  ax-8 1491  ax-10 1492  ax-11 1493  ax-i12 1494  ax-bndl 1496  ax-4 1497  ax-17 1513  ax-i9 1517  ax-ial 1521  ax-i5r 1522  ax-ext 2146
This theorem depends on definitions:  df-bi 116  df-tru 1345  df-nf 1448  df-sb 1750  df-clab 2151  df-cleq 2157  df-clel 2160  df-nfc 2295  df-v 2723  df-in 3117  df-ss 3124  df-lti 7239
This theorem is referenced by:  ltsonq  7330  caucvgprlemk  7597  caucvgprlem1  7611  caucvgprlem2  7612  caucvgprprlemk  7615  caucvgprprlemval  7620  caucvgprprlem1  7641  caucvgprprlem2  7642  ltrenn  7787
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