Who Cites proddeq?
proddeq	Def proddeq(a;b)(p,q) == (1of(a)(1of(p),1of(q)))(1of(b)(2of(p),2of(q)))
	Thm* A,B:Type, a:EqDecider(A), b:EqDecider(B). proddeq(a;b)  ABAB
pi2	Def 2of(t) == t.2
	Thm* A:Type, B:(AType), p:(a:AB(a)). 2of(p)  B(1of(p))
pi1	Def 1of(t) == t.1
	Thm* A:Type, B:(AType), p:(a:AB(a)). 1of(p)  A
band	Def pq == if p q else false fi
	Thm* p,q:. (pq)

Syntax:

proddeq(a;b)

has structure:

proddeq(a; b)

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