Lemma 2.3. Let xº be an arbitrary point in R" and let L be any linear subspace of R. Let x be the minimizer of the function f(p) = p Ap-bp restricted to xº + L. Let s € R" be any vector that is A-conjugate to L. Let & be the minimizer of the one-dimensional function obtained by restricting ƒ to the line {x + as: a € R}. Then x is the minimizer of f restricted to xº + span(LU {s}).

Elementary Linear Algebra (MindTap Course List)
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Chapter5: Inner Product Spaces
Section5.CR: Review Exercises
Problem 42CR: Repeat Exercise 41 for B={(1,2,2),(1,0,0)} and x=(3,4,4). Let B={(0,2,2),(1,0,2)} be a basis for a...
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Lemma 2.3. Let xº be an arbitrary point in R" and let L be any linear subspace of R. Let x be the
minimizer of the function f(p) = p Ap-bp restricted to xº + L. Let s € R" be any vector that is
A-conjugate to L. Let & be the minimizer of the one-dimensional function obtained by restricting f to the
line {x + as: a € R}. Then x is the minimizer of f restricted to xº + span(LU {s}).
Transcribed Image Text:Lemma 2.3. Let xº be an arbitrary point in R" and let L be any linear subspace of R. Let x be the minimizer of the function f(p) = p Ap-bp restricted to xº + L. Let s € R" be any vector that is A-conjugate to L. Let & be the minimizer of the one-dimensional function obtained by restricting f to the line {x + as: a € R}. Then x is the minimizer of f restricted to xº + span(LU {s}).
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