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Theorem ltrelpi 7286
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 7269 . 2 <N = ( E ∩ (N × N))
2 inss2 3348 . 2 ( E ∩ (N × N)) ⊆ (N × N)
31, 2eqsstri 3179 1 <N ⊆ (N × N)
Colors of variables: wff set class
Syntax hints:  cin 3120  wss 3121   E cep 4272   × cxp 4609  Ncnpi 7234   <N clti 7237
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 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152
This theorem depends on definitions:  df-bi 116  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-v 2732  df-in 3127  df-ss 3134  df-lti 7269
This theorem is referenced by:  ltsonq  7360  caucvgprlemk  7627  caucvgprlem1  7641  caucvgprlem2  7642  caucvgprprlemk  7645  caucvgprprlemval  7650  caucvgprprlem1  7671  caucvgprprlem2  7672  ltrenn  7817
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