he zero vector in U is a subspace of V.

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
Topic Video
Question

Need help with part (a). Thank you :)

1. Let V be an n -dimensional vector space and let W C V be an m -dimensional subspace. For each v E V, define Sy = {v+w:w€ W}, and let
U = {S, : v E V}. Define addition in U so that for any x, y E V
Sx + Sy = Sx+y
||
and define scalar multiplication so that for any k E R
kSx
Skx
It can be shown that U is vector space (you do not need to prove this).
(a) Explain why the zero vector in U is a subspace of V.
(b) Prove, by induction, that for any k > 1 and any choice of c1, ..., Ck ER and x1, ..., X E V, if v = E C;X; then
Sy = c;Sx,
i=1
(c) What is dim(U)? (Hint: Consider a basis for V which contains a basis for W, and use it to construct a basis for U.)
(d) Let T: V →V' be a linear transformation. Let W
ker(T), let U be as defined above, and for each v E V define
=
$(Sv) = T(v) (*)
Since it is possible for Sy = Sw with v w, it is not immediately clear that o is well defined. Prove that (*) does indeed define a function
$: U → V', by showing that for any x, y E V satisfying Sx = Sy we have (Sx) = ¢(Sy).
(e) Show that ø is linear.
(f) For what values of dim(V') is ø injective?
(g) For what values of dim(V') is ø surjective?
||
W
||
Transcribed Image Text:1. Let V be an n -dimensional vector space and let W C V be an m -dimensional subspace. For each v E V, define Sy = {v+w:w€ W}, and let U = {S, : v E V}. Define addition in U so that for any x, y E V Sx + Sy = Sx+y || and define scalar multiplication so that for any k E R kSx Skx It can be shown that U is vector space (you do not need to prove this). (a) Explain why the zero vector in U is a subspace of V. (b) Prove, by induction, that for any k > 1 and any choice of c1, ..., Ck ER and x1, ..., X E V, if v = E C;X; then Sy = c;Sx, i=1 (c) What is dim(U)? (Hint: Consider a basis for V which contains a basis for W, and use it to construct a basis for U.) (d) Let T: V →V' be a linear transformation. Let W ker(T), let U be as defined above, and for each v E V define = $(Sv) = T(v) (*) Since it is possible for Sy = Sw with v w, it is not immediately clear that o is well defined. Prove that (*) does indeed define a function $: U → V', by showing that for any x, y E V satisfying Sx = Sy we have (Sx) = ¢(Sy). (e) Show that ø is linear. (f) For what values of dim(V') is ø injective? (g) For what values of dim(V') is ø surjective? || W ||
Expert Solution
steps

Step by step

Solved in 3 steps

Blurred answer
Knowledge Booster
Hypothesis Tests and Confidence Intervals for Means
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, advanced-math and related others by exploring similar questions and additional content below.
Similar 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,