Mathematicians

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Across
  1. 5. Discovered quaternions
  2. 7. Defined laws of fall and pendulum
  3. 9. leading figure of fractal geometry
  4. 10. Founder of graph theory
  5. 12. Proposed 23 problems for the 20th century
  6. 13. Introduced symbols to algebra
  7. 14. inventor of algebra
  8. 15. Author of elements of geometry
  9. 16. Developer of math behind complex waves.
  10. 17. proved fermat’s theorem
  11. 18. developed field of fluid dynamics
Down
  1. 1. First iranian female mathematician to receive field medal
  2. 2. calculated the size of earth
  3. 3. invented Boolean algebra and logic
  4. 4. Gave general method to find solution of Pell's Equation.
  5. 6. Famous for incompleteness theorem
  6. 7. founder figure of set theory
  7. 8. inventor of planar coordinates
  8. 11. Developed trigonometry
  9. 14. calculated first accurate calculation of pi