Talk:Discrete Mathematics/Set theory/Answers

I think that answering "Yes" to 1a shows a bias for a particular alphabet and number system.

For example, what about Cyrillic characters? They are part of an alphabet, and therefore should be considered an element of the universe of alphanumeric characters. If you include all alphabets, do you include linear A and other extinct alphabets? If so, should you include possible future alphabets, which would in effect may the answer to 1A "No" because the set of all possible alphabets is not well defined.

What about numeric characters. The answer given lists only characters for base 10. There are an infinite number of possible bases, which would then require an infinite number of unique numeric characters. This also makes the answer for 1a "No".

In Exercise 4 Q2(f) Step 3, shouldn't it be A ∪ (B ∩ ø)?