Mathematical Economics Set 3

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Across
  1. 3. matrix where A*i*x=A*j*x=0 for all i & j
  2. 5. all identity matrices are necessarily ___
  3. 7. (TD)'
  4. 8. rational but not an integer
  5. 10. for matrix A with orders 3 & 5, if 10|A|=65, then 15|A|=?
  6. 11. Missing sub-script for |E| = where e is an element of matrix E and C is the co-factor
Down
  1. 1. Cofactor = -1^(i+j) ______
  2. 2. |A^-1| where A is R1: 3 2; R2: 1 0
  3. 4. a square matrix with linearly dependent rows
  4. 6. post or pre multiplication with this matrix leaves everything unchanged
  5. 9. C=A×B Matrix A: R1 = 2 3; R2 = 1 0 ; R3 = 4 1 and Matrix B: R1 = 5; R2 = 9