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Definition df-lti 6291
Description: Define 'less than' on positive integers. This is a "temporary" set used in the construction of complex numbers, and is intended to be used only by the construction. (Contributed by NM, 6-Feb-1996.)
Assertion
Ref Expression
df-lti <N = ( E ∩ (N × N))

Detailed syntax breakdown of Definition df-lti
StepHypRef Expression
1 clti 6259 . 2 class <N
2 cep 4015 . . 3 class E
3 cnpi 6256 . . . 4 class N
43, 3cxp 4286 . . 3 class (N × N)
52, 4cin 2910 . 2 class ( E ∩ (N × N))
61, 5wceq 1242 1 wff <N = ( E ∩ (N × N))
Colors of variables: wff set class
This definition is referenced by:  ltpiord  6303  ltrelpi  6308
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