all finite set is countable.but,countable can be finite or infinite
A null set, a finite set, a countable infinite set and an uncountably infinite set.
Yes, finite numbers are always countable.
Finite, no.
An empty set is considered a finite set because it contains zero (0) elements and zero is a finite number.
all finite set is countable.but,countable can be finite or infinite
A null set, a finite set, a countable infinite set and an uncountably infinite set.
Yes, finite numbers are always countable.
YES
It is a measure, but it isn't always sigma-finite. Take your space X = [0,1], and u = counting measure if u(E) < infinity, then E is a finite set, but there is no way to cover the uncountable set [0,1] by a countable collection of finite sets.
here is the proof: http://planetmath.org/encyclopedia/ProductOfAFiniteNumberOfCountableSetsIsCountable.html
Yes. the set of rational numbers is a countable set which can be generated from repeatedly taking countable union, countable intersection and countable complement, etc. Therefore, it is a Borel Set.
the number of steps of an algorithm will be countable and finite.
prove that every subset of a finite set is a finite set?
Yes.
Finite, no.
A finite set has a finite number of elements, an infinite set has infinitely many.