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Theorem ltrelpi 7132
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 7115 . 2 <N = ( E ∩ (N × N))
2 inss2 3297 . 2 ( E ∩ (N × N)) ⊆ (N × N)
31, 2eqsstri 3129 1 <N ⊆ (N × N)
Colors of variables: wff set class
Syntax hints:  cin 3070  wss 3071   E cep 4209   × cxp 4537  Ncnpi 7080   <N clti 7083
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 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2121
This theorem depends on definitions:  df-bi 116  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2126  df-cleq 2132  df-clel 2135  df-nfc 2270  df-v 2688  df-in 3077  df-ss 3084  df-lti 7115
This theorem is referenced by:  ltsonq  7206  caucvgprlemk  7473  caucvgprlem1  7487  caucvgprlem2  7488  caucvgprprlemk  7491  caucvgprprlemval  7496  caucvgprprlem1  7517  caucvgprprlem2  7518  ltrenn  7663
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