- #1
cragar
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Homework Statement
{1,1/2,2/3,3/4,4/5...} is this set compact.
The Attempt at a Solution
I think this set is compact because it contains its cluster point which is 1.
is this correct?
A compact set is a type of set in mathematics that is defined as being closed and bounded. This means that every sequence of points within the set has a limit point also contained within the set.
Unlike other types of sets, a compact set has the property that every open cover, or collection of open sets, of the set has a finite subcover. This means that the set can be covered by a finite number of open sets, unlike other types of sets which may require an infinite number of open sets to cover them.
Examples of compact sets include a closed interval [a,b] on the real number line, a closed ball in n-dimensional Euclidean space, and a closed and bounded set in a metric space.
Compact sets are important in mathematics because they have many useful properties and are often used in proofs and constructions in various branches of mathematics, such as topology, analysis, and geometry. They also have important applications in physics and engineering.
Compact sets have many real-world applications, such as in optimization problems where a compact set represents a feasible region, in data analysis and machine learning where compact sets can represent clusters or patterns in data, and in physics where compact sets are used to model physical systems with finite boundaries.