Mathematician Mayhem

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Across
  1. 3. "Prince of Mathematicians"
  2. 4. NASA mathematician
  3. 7. Co-inventor of calculus
  4. 10. Also co-invented calculus
  5. 14. First notable female mathematician
  6. 15. Developed the Cartesian coordinate system
  7. 18. Proved Fermat's Last Theorem
  8. 19. Prolific Swiss mathematician
  9. 20. Theorem about right triangles
Down
  1. 1. First computer programmer
  2. 2. Father of fractal geometry
  3. 5. Pioneer of theoretical computer science and AI
  4. 6. Father of geometry
  5. 8. "Eureka!" discoverer
  6. 9. Game theory Nobel laureate
  7. 11. Groundbreaking algebraist
  8. 12. First female Fields Medal winner
  9. 13. Self-taught Indian mathematical genius
  10. 16. Sequence named after him
  11. 17. Incompleteness theorems