Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter7: Distance And Approximation
Section7.1: Inner Product Spaces
Problem 12EQ
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E =
le (0) =
with the inner product
{u: [0, 7] → RN | u is absolutely continuous,
u(T), ù € L²([0, 7]. RN))
[[(i(1), v (1)) + (u(1), v(1))]dr
for all u, v € E where (...) denotes the inner product in RN. The corresponding norm
is defined by
AU. VYTE=
||u||E= [(lù(1³² +\u(1)1³²)dr. V u € E.
For every u, ve E, we define
=S² eQ(¹) [(ù (1), v(1)) + (A(1)u(1), v(t))]dt,
4. V Y=
and we observe that, by the assumptions (A1) and (A2), it defines an inner product in
E. Then, E is a separable and reflexive Banach space with the norm
||u|| =< u, u > ² Vue E.
||ul|oo ≤S|| u ||
where ||ul|∞ = maxic[0,71 |u(t)].
The question is why is norm
defined in this way, please clarify?
(2)
Transcribed Image Text:E = le (0) = with the inner product {u: [0, 7] → RN | u is absolutely continuous, u(T), ù € L²([0, 7]. RN)) [[(i(1), v (1)) + (u(1), v(1))]dr for all u, v € E where (...) denotes the inner product in RN. The corresponding norm is defined by AU. VYTE= ||u||E= [(lù(1³² +\u(1)1³²)dr. V u € E. For every u, ve E, we define =S² eQ(¹) [(ù (1), v(1)) + (A(1)u(1), v(t))]dt, 4. V Y= and we observe that, by the assumptions (A1) and (A2), it defines an inner product in E. Then, E is a separable and reflexive Banach space with the norm ||u|| =< u, u > ² Vue E. ||ul|oo ≤S|| u || where ||ul|∞ = maxic[0,71 |u(t)]. The question is why is norm defined in this way, please clarify? (2)
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