theorem Th24: :: MATRIXJ2:24
for K being Field
for L being Element of K
for V1, V2 being finite-dimensional VectSp of K
for b1 being OrdBasis of V1
for B2 being FinSequence of V2
for J being FinSequence_of_Jordan_block of L,K
for M being Matrix of len b1, len B2,K st M = block_diagonal (J,(0. K)) holds
for i, m being Nat st i in dom b1 & m = min ((Len J),i) holds
( ( i = Sum (Len (J | m)) implies (Mx2Tran (M,b1,B2)) . (b1 /. i) = L * (B2 /. i) ) & ( i <> Sum (Len (J | m)) implies (Mx2Tran (M,b1,B2)) . (b1 /. i) = (L * (B2 /. i)) + (B2 /. (i + 1)) ) )