Optimization techniques

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Across
  1. 1. Mathematical relation between variables
  2. 6. Lowest value of a function
  3. 9. Derivative exists
  4. 12. Property without breaks
  5. 15. Function to be optimized
  6. 16. Vector of partial derivatives
  7. 17. Point that is neither maximum nor minimum
  8. 19. Quantity that can change
  9. 20. Matrix of second-order derivatives
Down
  1. 2. Point where derivative is zero
  2. 3. Function with two independent variables
  3. 4. Derivative with respect to one variable
  4. 5. Function with one independent variable
  5. 7. Highest value of a function
  6. 8. Set of output values
  7. 10. Restriction on variables
  8. 11. Method for constrained optimization
  9. 13. Process of finding maximum or minimum
  10. 14. Set of input values
  11. 18. Rate of change of a function