Suppose that v1, V2, . . . , Vn are linearly independent column vectors in F“:* and let e1, e2,..., en be the orthonormal vectors that result from the Gram-Schmidt process. (a) Show that there exist aj, E F such that: Vj = aj,1€1+..ɑj jej +0ej+1+...+0en for each j= 1, ...,n. (b) Let B be the n xn matrix in IF," such that column j of B is vj. Let Q be the n x n matrix in F"," such that column j of Q is ej. Use your answer in (a) to find an upper triangular matrix R such that B=QR.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Suppose that v1, V2, . .. , Vn are linearly independent column vectors in F" and let e1, e2,..., en be the
orthonormal vectors that result from the Gram-Schmidt process.
(a) Show that there exist aj; EF such that:
Vj = aj,1e1+.Aj.jºj+0ej+1+...+0e,
for each j= 1,..., n.
(b) Let B be the n x n matrix in F;" such that column j of B is v;. Let Q be the n x n matrix in F"." such that
column j of Q is ej. Use your answer in (a) to find an upper triangular matrix R such that B= QR.
%3D
Transcribed Image Text:Suppose that v1, V2, . .. , Vn are linearly independent column vectors in F" and let e1, e2,..., en be the orthonormal vectors that result from the Gram-Schmidt process. (a) Show that there exist aj; EF such that: Vj = aj,1e1+.Aj.jºj+0ej+1+...+0e, for each j= 1,..., n. (b) Let B be the n x n matrix in F;" such that column j of B is v;. Let Q be the n x n matrix in F"." such that column j of Q is ej. Use your answer in (a) to find an upper triangular matrix R such that B= QR. %3D
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