Midterm Crossword Puzzle: Foundations of Mathematics

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Across
  1. 6. An irrational number approximately 3.14159.
  2. 7. The remainder after division.
  3. 9. Coordinate system with x and y axes.
  4. 10. The input values for a function.
  5. 14. A number system with base 16.
  6. 17. A flat two-dimensional surface.
  7. 18. A reference line in coordinate systems.
  8. 19. The result of addition.
  9. 21. Product of all positive integers up to a number.
  10. 24. A number system with base 2.
  11. 25. A set with a binary operation satisfying four properties.
  12. 26. Greek letter used to denote summation.
  13. 27. A number divisible only by 1 and itself.
  14. 29. A rectangular array of numbers.
  15. 31. Property where order does not affect the result.
  16. 33. Common elements between sets.
  17. 36. A statement comparing two values.
  18. 38. A symbol representing a number.
  19. 40. The result of an exponentiation.
  20. 42. A relation where each input has exactly one output.
  21. 43. The steepness of a line.
  22. 44. The area under a curve.
  23. 45. A statement with an equal sign.
  24. 48. A character representing an operation or relation.
  25. 49. The result of division.
  26. 50. The output values of a function.
Down
  1. 1. A number expressible as a fraction.
  2. 2. Combination of elements from two sets.
  3. 3. The result of multiplication.
  4. 4. Whole numbers, including negatives and zero.
  5. 5. An ordered list of elements.
  6. 8. A number system with base 8.
  7. 11. A concept of something without bound.
  8. 12. A fundamental concept in calculus approaching a value.
  9. 13. Greek letter often representing change.
  10. 15. Numbers that include rational and irrational numbers.
  11. 16. Property linking multiplication and addition.
  12. 20. Rate of change in calculus.
  13. 22. Property where grouping does not affect the result.
  14. 23. The number of elements in a set.
  15. 28. The additive identity.
  16. 30. A well-defined collection of distinct elements.
  17. 32. A number not divisible by 2.
  18. 34. Numbers involving the square root of negative one.
  19. 35. A straight one-dimensional figure.
  20. 37. A number’s distance from zero.
  21. 39. A fixed value.
  22. 41. A number divisible by 2.
  23. 46. A number that produces a specified quantity when multiplied by itself.
  24. 47. A set contained within another set.