Dear sir/Madam,

I am praveen here,

please find SCANNED Attachments.These contains some problems.

i need solution for these problems.

I request to send solutions.

thanking you

Regards,

Praveen

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- Jun 17th 2006, 05:14 AMpraveensolutions
Dear sir/Madam,

I am praveen here,

please find SCANNED Attachments.These contains some problems.

i need solution for these problems.

I request to send solutions.

thanking you

Regards,

Praveen - Jun 17th 2006, 07:25 PMThePerfectHacker
3b)

3c)

Therefore the poles are where the denominator is zero,

Thus,

- Jun 17th 2006, 07:31 PMThePerfectHacker
1a)Maybe? Since this infinite series can be diffrenciated it must be countinous. Since diffrenciablility implies couninutitity.

1b)

The solution(s) to

are,

Since there are pure imaginaries,

thus,

Then you are looking at,

Thus,

Has pure imaginaries solutions only when,

Thus,

---

Solution,

- Jul 4th 2006, 08:22 AMRebesques
1a) If the space is finite, then it is certainly compact.

Conversely, suppose the space X is compact. Consider the (open) covering . Since X is compact, there exists a finite subcovering As our metric is the discreet metric, So X is finite.

Now for C[a,b]. We should show that there exists some numerable and dense subset of C[a,b].

Surely, this cannot be done off the top of our heads. Weierstrass' Approximation Theorem, sais that the set of polynomials P[a,b] C[a,b] is dense.

If we could create a numerable and dense subset of P[a,b], we would be done.

Mumble, mumble... What about polynomials with rational coefficients?

Worth a try.

1b) Remember ,

so

so again

- Jul 5th 2006, 11:51 AMRebesques
Bored to do any work (again), so lets try 3a.

-Note that sinz=-z+z^3/3!-... so sinz/z^7=(1/z^6)*(-1+...)

This means z=0 is a pole of order 6.

-Now e^{1/z}=1+1/z+1/(2!z^2)+... and so there are infinite terms in the series to diverge at z=0; this means z=0 is an essential singularity.

-Also (1-cosz)/z=(-z^2/2!-z^3/3!-...)/z=-z/2!-z^2/3!-...

so z=0 is a simple root. - Jul 15th 2006, 11:28 AMRebesques
...And just thought of an answer to 2)a).

There is a set of unit vectors to form a basis (*) for X. Consider any linear mapping not to vanish on S (we can have this as Y is nonempty) and define This mapping is well defined as S is a basis.

We then have

by the way is defined.

(*) a correction: we can extract such a set S from the actual basis set B -which I admit, need not be countable. Define the operator to be zero on B-S and everything works fine. :) :o - Jul 17th 2006, 06:33 AMRebesques
Lunch time...

No lunch for those not paid, so let's try 2b), which actually I could have figured out much sooner if I was not wasting braincells on myspace. :o

i) is reflexive. Just show that for every there exists a sequence with .

For this, consider a (continuous linear) functional on , and let the unit occupying the n-th place. This sequence is a basis for , as they are linearly independent and . We exploit linearity to obtain

,

so all functionals determine (and are completely determined by) the sequence . To show this belongs to , take for any natural k, and using continuity

or

and since k was arbitrary, . On the other hand, Holder's inequality gives

so also , so these are equal.

ii) Direct application of the Open Mapping Theorem: There is

such that corresponding balls satisfy

,

so for we have or . So is continuous.