0
votes
0answers
36 views

Starting a sentence with “And so” in a mathematical proof

Inspired by this question, I thought of something more. As Tim says, and I ageree, one more often sees repeated use of "Hence", "Therefore" etc. in a mathematical proof, and not very often do people ...
3
votes
2answers
692 views

“Hence”, “therefore” and “so” in mathematical proofs

It seems to me that "so" is seldom used in math proofs. Instead, "hence" and "therefore" are used very often, even repeatedly appearing in several sentences in a row. So I wonder if my feeling is ...
12
votes
5answers
8k views

Does “either A or B ” preclude “both A and B”?

In mathematics, "A or B" includes "A and B". Does "either" mean "A or B but not (A and B)" or does it include the possibility of "A and B"? The context might be mathematics, formal logic or ordinary ...