Chapter 5: Q17E (page 261)
Consider a linear space V. For which linear transformations Tfrom Vto is
an inner product in V?
Short Answer
T is one-one.
Chapter 5: Q17E (page 261)
Consider a linear space V. For which linear transformations Tfrom Vto is
an inner product in V?
T is one-one.
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Get started for freeIf the nxnmatrices Aand Bare orthogonal, which of the matrices in Exercise 5 through 11 must be orthogonal as well? .
Leonardo da Vinci and the resolution of forces. Leonardo (1452–1519) asked himself how the weight of a body, supported by two strings of different length, is apportioned between the two strings.
Three forces are acting at the point D: the tensions and in the strings and the weight . Leonardo believed that
Was he right? (Source: Les Manuscripts de Léonard de Vinci, published by Ravaisson-Mollien, Paris, 1890.)
Hint: Resolveinto a horizontal and a vertical component; do the same for . Since the system is at rest, the equationholds. Express the ratios
and . In terms ofand , using trigonometric functions, and compare the results.
Use the various characterizations of orthogonal transformations and orthogonal matrices. Find the matrix of an orthogonal projection. Use the properties of the transpose. Which of the matrices in Exercise 1 through 4 are orthogonal? .
If the matrices Aand Bare orthogonal, which of the matrices in Exercise 5 through 11 must be orthogonal as well?.
Using paper and pencil, perform the Gram-Schmidt process on the sequences of vectors given in Exercises 1 through 14.
12.
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