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Consider the linear system Ax = b where A ∈Rn×n is non-singular and b ∈Rn.

assume A is symmetric (but not necessarily positive definite), and consider

again the oblique projection framework.


Wk = AKk

Where AKk is the Krylov space


Show that 〈r0,rk〉= ‖rk‖^2


Consider the linear system Ax = b where A ∈Rn×n is non-singular and b ∈Rn.


Assuming A is positive definite, consider the oblique projection framework where Wk = AKk,

and show that Span{r0,r1,...,rk−1}= Kk (A,r0)

Where ri are the residuals and Kk is the Krylov space


1. Find the dimension of the subspace spanned by the following vectors in V3(R). (1, 0, 2), (2, 0, 1), (1, 0, 1).

Find the inverse of the given set of ordered pairs, Then, type F if the inverse is a function or R if its is a mere relation.


1.) {(-3,5), (2,-4), (6,10), (3,-5)}


2.) {(5,1), (4,2), (3,3), (2,5)}


3.) {(1,1), (2,2), (3,3), (4,4)}


True or False : 3Z = Z + Z + Z when Z is a matrix

Show that if be the Eigenvalues of the matrix, then has the Eigenvalues

.

λ1, λ2, λ3, . . . λn A An

λn

1 , λ n

2 , λn

3 . . . λn

n


Reduce the quadratic form


2 2 2 8 7 3 12 – 8 4 x y z xy yz zx    


to the canonical form


through an orthogonal transformation and hence show that it


is positive Semi-definite.
There are two particular solutions of a first-order inhomogeneous linear equation: y

1



=3

x

,y

2



=x.Find a solution to this equation satisfying the initial condition y(1)=−1. In answer, enter the value y(2).


Enter your answer:

In R

4

let L

1

be the subspace spaned by the vectors a=(1;2;5;1), b=(4;3;3;0), c=(7;4;1;−1), and let L

2

be the subspace spaned by the vectors d=(1;1;1;1), f=(−1;0;3;−1) and g=(5;2;−1;−3). Find the dimension of L

1

∩L

2

.


In R^3 we have a = (1, 0,-2); b = (-1, 3, 1) and we consider x = a + b; y = -2a + b and z =3a – 5b.

Using the properties of the vector space, calculate T = 2x – 3y + z.


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