Shane >:)

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Across
  1. 9. Function representation using sine and cosine
  2. 10. Matrix of partial derivatives
  3. 12. Calculus operation for finding area
  4. 15. Value approached by a function
  5. 17. Calculus on multi-dimensional fields
  6. 18. The rate of change of a function
  7. 19. Polynomial approximation of a function
  8. 20. Transform converting differential equations
Down
  1. 1. Optimization method with constraints
  2. 2. Relationship between exponential and trigonometric functions
  3. 3. Measure of vector field expansion
  4. 4. Property of series with a limit
  5. 5. Plane integral theorem
  6. 6. Sum of infinitely many terms
  7. 7. Derivative with respect to one variable
  8. 8. Generalization of Riemann integral
  9. 11. Complete normed vector space
  10. 13. Complex function conditions
  11. 14. Unbroken and connected function
  12. 16. Fundamental theorem for curls