Exercise 4. Suppose f I→ X is a continuous map from the interval ICR to the topological space X. Consider the graph Graph(f) C IX X of f, defined as usual by Graph(f)= {(t, f(t)) | te I} CRx X}. a) Show that I is homeomorphic to Graph(f), with the topology on Graph(f) induced from the product topology on R X X. b) Show that both Graph(f) and its closure Graph(f) in Rx X are connected. c) Assume X is Hausdorff. Show that the closure Graph(f) is compact if and only if I is a bounded interval and the closure f(I) in X is compact.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
icon
Related questions
Question
Exercise 4 Need part a, b, and c
Exercise 4. Suppose f: I→ X is a continuous map from the interval ICR to the topological
space X. Consider the graph Graph(f) C IX X of f, defined as usual by
Graph(f) = {(t, f(t)) | t € I} < R × X}.
a) Show that I is homeomorphic to Graph(f), with the topology on Graph(f) induced from the
product topology on RX X.
b) Show that both Graph (f) and its closure Graph(f) in R × X are connected.
c) Assume X is Hausdorff. Show that the closure Graph (f) is compact if and only if I is a
bounded interval and the closure f(I) in X is compact.
1
Transcribed Image Text:Exercise 4. Suppose f: I→ X is a continuous map from the interval ICR to the topological space X. Consider the graph Graph(f) C IX X of f, defined as usual by Graph(f) = {(t, f(t)) | t € I} < R × X}. a) Show that I is homeomorphic to Graph(f), with the topology on Graph(f) induced from the product topology on RX X. b) Show that both Graph (f) and its closure Graph(f) in R × X are connected. c) Assume X is Hausdorff. Show that the closure Graph (f) is compact if and only if I is a bounded interval and the closure f(I) in X is compact. 1
Expert Solution
steps

Step by step

Solved in 5 steps with 3 images

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Advanced Engineering Mathematics
Advanced Engineering Mathematics
Advanced Math
ISBN:
9780470458365
Author:
Erwin Kreyszig
Publisher:
Wiley, John & Sons, Incorporated
Numerical Methods for Engineers
Numerical Methods for Engineers
Advanced Math
ISBN:
9780073397924
Author:
Steven C. Chapra Dr., Raymond P. Canale
Publisher:
McGraw-Hill Education
Introductory Mathematics for Engineering Applicat…
Introductory Mathematics for Engineering Applicat…
Advanced Math
ISBN:
9781118141809
Author:
Nathan Klingbeil
Publisher:
WILEY
Mathematics For Machine Technology
Mathematics For Machine Technology
Advanced Math
ISBN:
9781337798310
Author:
Peterson, John.
Publisher:
Cengage Learning,
Basic Technical Mathematics
Basic Technical Mathematics
Advanced Math
ISBN:
9780134437705
Author:
Washington
Publisher:
PEARSON
Topology
Topology
Advanced Math
ISBN:
9780134689517
Author:
Munkres, James R.
Publisher:
Pearson,