Let Hk = I−2uuT be a Householder transformation with u = (0, . . . , 0, uk, uk+1, . . . , un)T Let b ∈ Rn and let A be an n × n matrix. How many additions and multiplications are necessary to compute (a) Hkb?; (b) HkA?
Let Hk = I−2uuT be a Householder transformation with u = (0, . . . , 0, uk, uk+1, . . . , un)T Let b ∈ Rn and let A be an n × n matrix. How many additions and multiplications are necessary to compute (a) Hkb?; (b) HkA?
Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
Publisher:Ron Larson
Chapter6: Linear Transformations
Section6.3: Matrices For Linear Transformations
Problem 52E: Let T be a linear transformation T such that T(v)=kv for v in Rn. Find the standard matrix for T.
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Let Hk = I−2uuT be a Householder transformation
with
u = (0, . . . , 0, uk, uk+1, . . . , un)T
Let b ∈ Rn and let A be an n × n matrix. How
many additions and multiplications are necessary
to compute (a) Hkb?; (b) HkA?
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