History of Mathematics

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Across
  1. 5. Latinized namesake of 'algorithm'
  2. 9. Pythagorean drowning victim
  3. 12. "Do not disturb my circles" [dying breath]
  4. 13. Mathematician and Astronomer, sans Pharaoh
  5. 14. Bamboo strips showing the first base-ten multiplication chart
  6. 15. Great architects who apparently couldn't be bothered with mathematical theory
  7. 16. Egyptians fractions
  8. 18. Subject derived from the book Calculation by Completion and Balancing
Down
  1. 1. Egyptian instruction manual for students (antiquarian)
  2. 2. Babylonian number system
  3. 3. Introduced Hindu-Arabic numerals to Europe ('son of Bonacci')
  4. 4. Egyptian instruction manual for students (author)
  5. 6. Medieval curriculum of arithmetic, geometry, astronomy, and music
  6. 7. Babylonian reason for 360 degrees in a circle
  7. 8. First to explain zero as a placeholder and decimal digit
  8. 9. OG Women of STEM member
  9. 10. Early bone found with tally marks
  10. 11. The Pythagorean's greatest fear
  11. 17. Formal Greek reasoning