Recent content by asi123

Ok, so I did the following: I woluld first use BFS algorithm (it has to be run for each vertical) for computng shortest distances between all pairs of verticles. Then for each vertical V find Vm - the largest distance to any other verticles amongs the data retuirned form BFS. Then, the...

Homework Statement Hey guys, I have this question. Given a tree T = (V , F), find an algorithm which finds u in V, so in the graph T = (V \ {u} , F) the size of each connected component is |V| / 2 at most. What is the complexity? Homework Equations The Attempt at a Solution...

Homework Statement Hey. I am taking a MATLAB class and my instructor is absolutely horrendous. he does not teach us anything, but asks questions on everything. I'm having a problem with the following question: http://imageshack.us/photo/my-images/641/55811089.png/ What is a...

Ops, that's the solution. Thanks a lot.

It will switch between the numerator and the denominator and will change the sign of the 1 and 4. How can that help? Thanks a lot.

Homework Statement Hey guys. Can I please have some help with this limit over here http://imageshack.us/photo/my-images/839/targil.jpg/ BTW I can't use l'Hôpital's rule. I'm trying to help someone how haven't learned how to Derivative yet. Thanks a lot. Homework...

Yeah, but then I'll get some kind of Ln(t)*e^-t, no?

Homework Statement Hey guys. How do I solve this integral? http://img816.imageshack.us/img816/208/68315659.png I've not been doing this for a long time :) Thanks a lot. Homework Equations The Attempt at a Solution

Homework Statement Hey guys. I've been sitting on this one for an hour or so. (got nothing) http://img138.imageshack.us/img138/765/24869754.png I think it has something to do with schwarz lemma but I'm not sure. Any help will be much appreciate. Thanks a lot. Homework...

Homework Statement Hey guys. I hope this is the right place to post this question. http://img641.imageshack.us/img641/70/97822806.jpg I have this "simple" complex function, and I need to decide where this function is analytic in the complex domain. So, I used the cauchy riemann...

Homework Statement Hey guys. I have this equation in red (in the pic) which I need to solve http://img241.imageshack.us/img241/9323/scan0004n.jpg As you can see I came up with with 2*t0. When I solve it in Matematica I come up with t2=t0 without the 2. Also, their answer in the...

Homework Statement Hey guys. I have this problem: http://img32.imageshack.us/img32/1561/78854429.jpg For the first part, I believe that adding those solution is just like adding the two levels of energy they represents and that's way this is not a solution for the equation, I...

Well, here is the second part of the question http://img207.imageshack.us/img207/879/95899388.jpg I also posted there answer. I think they have a mistake, I marked it in the red box. Shouldn't it be A^2=1/2 ? Am I missing something? Thanks a lot.

Oh, now I get it. Thanks a lot.

Yeah, but I don't have i and j inside the functions so how can I come up with the kronecker delta? How can I show that if i=j then it's 1 and if i does not equal to j, it's 0 if I don't have i and j? Thanks.