I have a set with unknown cardinality. The cardinality can be from a number a to a number b. How can I indicate the number a (or b)?
The question in texts is:
"What is the least value of n(A)"
(A is a set with a few possible cardinalities)
How can I properly express this in mathematical notation? I used the notation(If you call it a "notation") least of n(A)
I have seen this question: Mathematical notation for the maximum of a set of function values
The things that differ is that I need the notation to express the minimum (or max) number a function can give for a constant x, not the min (max) for a range of x
Also, the set of all possible sets isn't given and is there to be found out by the question solver. (as it implies, each solver may generate a different one)
n(A) is the cardinality of the set A
I do not have a strong mathematical background. so please avoid very confusing notations. thanks in advance