Which of these is the set of all interior points of the open interval
Definition. An interior point of a set of real numbers is a number such that the open interval is contained in for some positive number
Which of these is the set of all boundary points of the closed interval ?
Definition. A boundary point of a set of real numbers is a number such that every open interval contaning contains a number in and a number not in
Which of these is the set of all interior points of the closed interval
Definition. An interior point of a set of real numbers is a number such that the open interval is contained in for some positive number
True or False?
The set of all boundary points (using the definition below) of the natural numbers is
Definition. A boundary point of a set of real numbers is a number such that every open interval containing contains a number in and a number not in
What is
Notation. The bracket notation represents a closed interval, so is the set of all real numbers greater than or equal to 3 and less than or equal to 5.
The symbol represents set union, so The indexing represents an union of infinitely many sets, i.e.