Weekly Mathematician

2. Introduced overlapping circle diagrams to set theory. They're still used today in probability, stats, and logic.
6. Developed basic rules for using zero and worked with negative numbers.
9. He worked in early Geometry, especially with similar triangles and right angles. He also proved vertical angles are congruent.
10. Worked with Non-Euclidean elliptic Geometry.
13. Worked on complex Algebra problems. He found rational solutions to equations with several unknowns. He was first to recognize positive rational numbers as numbers, by allowing fractions for coefficients and solutions.
15. Created a two dimensional surface with only one side.
16. American Mathematician whose calculations of orbital mechanics at NASA were critical to the success of the first U.S. crewed space flights.
17. First to use a number line and the symbol for infinity. He set the standard notation for exponents.
18. Was 1st to compile a system of geometrical knowledge. Known for his quadrature of the lune.

1. Developed Cartesian coordinates and analytic geometry. He also was 1st to use superscripts for exponents.
3. Worked on decision problems and is known for their hypothesis about Hilbert's 10th problem.
4. Worked in proofs and logical methods
5. Was an English statistician, chemist, and brewer who pioneered small sample experimental design and is most famous for his "Student's t-distribution".
7. Worked with fractals and computer plotting of his and Julia's sets.
8. Was 1st to prove binomial theorem.
11. Developed infinitesimal calculus, solved linear equations with matrices, and worked with a binary system.
12. Is known for finding a way to determine the area of a triangle from its side lengths.
14. Worked in Geometry and also made advancements with fractions. He developed a formula for the volume of a cone.