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Definition df-lti 9978
Description: Define 'less than' on positive integers. This is a "temporary" set used in the construction of complex numbers df-c 10223, and is intended to be used only by the construction. (Contributed by NM, 6-Feb-1996.) (New usage is discouraged.)
Assertion
Ref Expression
df-lti <N = ( E ∩ (N × N))

Detailed syntax breakdown of Definition df-lti
StepHypRef Expression
1 clti 9950 . 2 class <N
2 cep 5223 . . 3 class E
3 cnpi 9947 . . . 4 class N
43, 3cxp 5309 . . 3 class (N × N)
52, 4cin 3768 . 2 class ( E ∩ (N × N))
61, 5wceq 1637 1 wff <N = ( E ∩ (N × N))
Colors of variables: wff setvar class
This definition is referenced by:  ltpiord  9990  ltsopi  9991  ltrelpi  9992
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