theorem Th14: :: REARRAN1:15

for C, D being non empty finite set
for c being Element of C
for F being PartFunc of D,REAL
for A being RearrangmentGen of C st F is total & card C = card D holds
( ( c in A . 1 implies (Rland (F,A)) . c = (FinS (F,D)) . 1 ) & ( for n being Nat st 1 <= n & n < len A & c in (A . (n + 1)) \ (A . n) holds
(Rland (F,A)) . c = (FinS (F,D)) . (n + 1) ) )