Yes it is. Given any number you can decide whether or not it belongs to the set.
Yes, except for one thing: mathematicians are not agreed whether 0 belongs to it.
Yes, except for one thing: mathematicians are not agreed whether 0 belongs to it.
Because the description which is given is sufficient to decide whether or not any given number is in the set.
Yes. Even numbers greater than 100 is a well defined set. (Although it is a set with an infinite number of members)
The set is well defined. Whether or not a given integer belongs to the set of prime numbers is clearly defined even if, for extremely large numbers, it may prove impossible to determine the status of that number.
The set is well defined. Whether or not a given integer belongs to the set of prime numbers is clearly defined even if, for extremely large numbers, it may prove impossible to determine the status of that number.
Yes, they ARE.
yes
Prime numbers have only 2 factors and their set is not well defined because they do not follow an orderly mathematical pattern.
Any well-defined set of numbers.