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Def P & Q == PQ

is mentioned by

Thm* (P1  P2 (Q1  Q2 P1 & Q1  P2 & Q2[and_functionality_wrt_implies]
Thm* (P1  P2 (Q1  Q2 (P1 & Q1  P2 & Q2)[and_functionality_wrt_iff]
Thm* B:(TProp). (x:TA & B(x))  A & (x:TB(x))[exists_over_and_r]
Thm* A & True  A[and_true_r]
Thm* True & A  A[and_true_l]
Thm* A & False  False[and_false_r]
Thm* False & A  False[and_false_l]
Thm* Dec(A ((A & B A  B)[not_over_and]
Thm* A  B  (A & B)[not_over_and_b]
Thm* (A  B A & B[not_over_or_a]
Thm* (A  B A & B[not_over_or]
Thm* A & B  B & A[and_comm]
Thm* A & (B & C (A & B) & C[and_assoc]
Thm* SqStable(P SqStable(Q SqStable(P & Q)[sq_stable__and]
Thm* Dec(P Dec(Q Dec(P & Q)[decidable__and]
Def a = !x:TQ(x) == Q(a) & (a':TQ(a' a' = a)[uni_sat]
Def {!x:T | P(x)} == {x:TP(x) & (y:TP(y y = x) }[unique_set]
Def P  Q == (P  Q) & (P  Q)[iff]

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