claim: Goldie Hawn's films were always box office flops.
evidence: In mathematics , especially in linear algebra and matrix theory , a centrosymmetric matrix is a matrix which is symmetric about its center .. mathematics. mathematics. linear algebra. linear algebra. matrix theory. Matrix ( mathematics ). matrix. matrix ( mathematics ). More precisely , an n × n matrix A = -LSB- Ai , j -RSB- is centrosymmetric when its entries satisfy. matrix. matrix ( mathematics ). Ai , j = An − i +1 , n − j +1 for 1 ≤ i , j ≤ n.. If J denotes the n × n matrix with 1 on the counterdiagonal and 0 elsewhere -LRB- that is , Ji , n +1 - i = 1 ; Ji , j = 0 if j = n +1 - i -RRB- , then a matrix A is centrosymmetric if and only if AJ = JA .. matrix. matrix ( mathematics ). The matrix J is sometimes referred to as the exchange matrix .. matrix. matrix ( mathematics ). exchange matrix. exchange matrix