Metamath Proof Explorer


Definition df-ltnq

Description: Define ordering relation on positive fractions. This is a "temporary" set used in the construction of complex numbers df-c , and is intended to be used only by the construction. Similar to Definition 5 of Suppes p. 162. (Contributed by NM, 13-Feb-1996) (New usage is discouraged.)

Ref Expression
Assertion df-ltnq <Q = ( <pQ ∩ ( Q × Q ) )

Detailed syntax breakdown

Step Hyp Ref Expression
0 cltq <Q
1 cltpq <pQ
2 cnq Q
3 2 2 cxp ( Q × Q )
4 1 3 cin ( <pQ ∩ ( Q × Q ) )
5 0 4 wceq <Q = ( <pQ ∩ ( Q × Q ) )