4 basic proof technique in math
## Some basic P => Q P: If statement Q: Tehn statement example: `If a < b, then a < b + 1`，`If a < b` 是 P, `then a < b+1` 是 Q ## 1....
## Some basic P => Q P: If statement Q: Tehn statement example: `If a < b, then a < b + 1`，`If a < b` 是 P, `then a < b+1` 是 Q ## 1....