Mathematicians

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Across
  1. 3. Indian genius known for infinite series and number theory.
  2. 6. Greek philosopher known for the right-angle triangle theorem.
Down
  1. 1. Indian who worked on calculus-like ideas before Newton.
  2. 2. Developed coordinate geometry (Cartesian plane).
  3. 4. English scientist who co-invented calculus.
  4. 5. German "Prince of Mathematics", famous for number theory.