Christmas

1234567891011121314151617181920
Across
  1. 5. What do you call a snake that is 3.14 meters long?
  2. 6. I am an odd number. Take away a letter and I become even. What number am I?
  3. 8. What's the one shape you should avoid at all costs?
  4. 9. What do you call a function that's always polite and well-behaved?
  5. 11. What’s yellow, linear, normed, and complete?
  6. 13. If January 1st, 2023 is a Sunday, on which day of the week will December 31st, 2023 fall? (First 4 letters)
  7. 14. What sound does a drowning analytic number theorist make?
  8. 18. Rebus 1
  9. 19. What’s nutritious and commutes?
Down
  1. 1. What’s sour, yellow, and equivalent to the Axiom of Choice?
  2. 2. An expression to represent both the loss of a parrot and a geometric shape
  3. 3. How is a PhD student in Theology like the Laplacian operator?
  4. 4. Rebus 2
  5. 7. An appropriate title for a knight named Koal
  6. 10. What is green and homeomorphic to the open unit interval?
  7. 12. Who said Wir müssen wissen, wir werden wissen?
  8. 15. “a mathematician is a device for turning coffee into theorems”. If the dual is taken: “a comathematician is a device for turning cotheorems into … “
  9. 16. Have you heard the one about the statistician?
  10. 17. Rebus 3
  11. 20. int x^{1/ln(x)} dx