3. Let K(r, y) = xy(x+ y), 0 < x,y <1 and consider the following operator K K f(y) = | K(y, 1)f(r)dx. %3D a) Is this operator bounded as an operator acting from L'(0, 1) into itself? b) Is K bounded as an operator acting from L (0, 1) into L'(0, 1)? c) Is K bounded as an operator acting on L²(0, 1)?
3. Let K(r, y) = xy(x+ y), 0 < x,y <1 and consider the following operator K K f(y) = | K(y, 1)f(r)dx. %3D a) Is this operator bounded as an operator acting from L'(0, 1) into itself? b) Is K bounded as an operator acting from L (0, 1) into L'(0, 1)? c) Is K bounded as an operator acting on L²(0, 1)?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
Related questions
Question
3
![8.
Problems for boundede operators
1. Let A: (2 → l² be given by
3
n+1
A(x1,., xn, ...) =
In..
2,....
n+ 2
a) Find the norm of A.
b) Find the adjoint A'.
c) Find the norm of A'.
2. Let A : L (0, 1) → L²(0, 1) be given by
(Af)(z) =
(r+t)f(t)dt.
Find the adjoint A'.
3. Let K(x, y) = xy(x+ y), 0 < x, y < 1 and consider the following
operator K
K f(y) = | K(y, x)f(x)dx.
a) Is this operator bounded as an operator acting from L'(0, 1) into
itself?
b) Is K bounded as an operator acting from L(0, 1) into L'(0, 1)?
c) Is K bounded as an operator acting on L²(0, 1)?
4. Consider the operator A: L²(0, 1) → L²(0, 1) from problem 2.
a) Is this operator bounded? If "yes", find it's norm.
b) Is the open mapping theorem applicable to this operator? Why?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7dbb4ae4-0d65-4baa-9481-63f79be91eca%2F96bfacf7-9b8d-417a-ac99-8e9ca0b7ac19%2F7om8n8xs_processed.jpeg&w=3840&q=75)
Transcribed Image Text:8.
Problems for boundede operators
1. Let A: (2 → l² be given by
3
n+1
A(x1,., xn, ...) =
In..
2,....
n+ 2
a) Find the norm of A.
b) Find the adjoint A'.
c) Find the norm of A'.
2. Let A : L (0, 1) → L²(0, 1) be given by
(Af)(z) =
(r+t)f(t)dt.
Find the adjoint A'.
3. Let K(x, y) = xy(x+ y), 0 < x, y < 1 and consider the following
operator K
K f(y) = | K(y, x)f(x)dx.
a) Is this operator bounded as an operator acting from L'(0, 1) into
itself?
b) Is K bounded as an operator acting from L(0, 1) into L'(0, 1)?
c) Is K bounded as an operator acting on L²(0, 1)?
4. Consider the operator A: L²(0, 1) → L²(0, 1) from problem 2.
a) Is this operator bounded? If "yes", find it's norm.
b) Is the open mapping theorem applicable to this operator? Why?
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