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(R is a 1-1 relation)

Who Cites rel 1 1?
rel_1_1Def  R is 1-1 == x,x':Ay,y':BR(x,y) & R(x',y' (x = x'  y = y')
Thm*  A,B:Type, R:(ABProp). (R is 1-1)  Type
iffDef  P  Q == (P  Q) & (P  Q)
Thm*  A,B:Prop. (A  B Prop
rev_impliesDef  P  Q == Q  P
Thm*  A,B:Prop. (A  B Prop

Syntax:R is 1-1 has structure: rel_1_1(ABR)

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