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# Matrix | Tensor Analysis Answers

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Show that eigen values of hermitian matrice are real numbers. Expalin.
Suppose A is a square matrix such that det(A0 = 2 and det(3A the power of t) = 18 then find the order of matrix A
Suppose A is a square matrix such that det(A)= 2 and det(3At)= 18 then find the order of matrix A
What are covariant and contravariant vectors? Show that acceleration is a contravariant vector.
Q. A second order tensor has components ■(2&1&0@1&-3&-1@0&-1&2) in OX1X2X3. The transformation between the coordinates X1, X2, X3 and X1’ , X2’ , X3’ is defined by
X1’=1/3 (2x1+2x2-x3)
X2’=1/3 (2x1-x2+2x3)
X3’=1/3(-x1+2x2+2x3)
(i)Find its components in the new system OX1’X2’X3’.(By using Matrix Formula).
(ii) Compute A’32 in the new system.(By using component formula)
Q. Write transformation equations for a second order tensor Aij w.r.t this transformation and verify A’ii=Aii
WHAT IS MEAN BY (0,2) and (2,0) (1,1) tensor.
For the following matrix calculate the determinant:
{{5,3,7},{1,0,1},{9,6,4}}
Evaluate the following:

{{1,2,3},{4,5,6},{7,8,9}} * {{7,4},{6,4},{5,3}}
Given the following:
A = 3 * 3
B = 2 * 4
C = 4 * 3
D = 3 * 2

Which of the following are defined:
A * D
D * B
A * D^T
C * D + A * D^T
A * B
A * D^T + C
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