MATHEMATICAL PUZZLE

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12345678910111213141516
Across
  1. 2. MARK, Rank of matrix A
  2. 6. XVII
  3. 7. 1 turn = 360°
  4. 10. ω letter
  5. 11. LXXX
  6. 13. ~ symbol
  7. 14. Division
  8. 16. Form by two rays
Down
  1. 1. ^ symbol
  2. 3. λ letter
  3. 4. Decimal separator
  4. 5. SET, Set of all possible values
  5. 8. Multiplication
  6. 9. A collection of elements
  7. 12. ζ letter
  8. 15. Infinite line