What is the interior of S? b. What is the boundary of S? c. Is S open, closed, or neither? All of the notions introduced in this lecture can be applied to sets of real numbers: write x for x and |x| for k x k. A neighborhood of a number
What is the interior of S? b. What is the boundary of S? c. Is S open, closed, or neither? All of the notions introduced in this lecture can be applied to sets of real numbers: write x for x and |x| for k x k. A neighborhood of a number
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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3. Let S = {x1, x2, . . . , xn} be a nonempty, finite set of points.
a. What is the interior of S?
b. What is the boundary of S?
c. Is S open, closed, or neither?
All of the notions introduced in this lecture can be applied to sets of real
numbers: write x for x and |x| for k x k. A neighborhood of a number x0 is
then a set of the form
{x : |x − x0| < δ} with δ > 0
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