Greek letters

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Across
  1. 4. ( )
  2. 5. (x,y)
  3. 6. det(A)
  4. 8. [ ]
  5. 9. .
  6. 10. A⊗B
Down
  1. 1. A*
  2. 2. dim(U)
  3. 3. ‖x‖
  4. 7. rank(A)