My Math Forum  

Go Back   My Math Forum > College Math Forum > Applied Math

Applied Math Applied Math Forum


Reply
 
LinkBack Thread Tools Display Modes
November 23rd, 2012, 01:30 PM   #1
Senior Member
 
Joined: Jul 2012

Posts: 225
Thanks: 0

First uni essay - help needed

Hi, I have a few questions that i need help with. Try and see if you can help please...
I'm not from an english speaking country so please bare with me.

1) H1 and H2 are planes in 3d vector space and they aren't parallel.
Prove that a third plane H3, contains the intersection line between H1 and H2 if and only if, H3 is a linear summary of H1 and H2 (not sure how to translate it, but you can infer from the connection...pretty sure it's not called linear summary in english)

2)
Group E has n subsets contained in it.
E is then multiplied by itself, p times. E*E*E....*E - p times. E^p so to speak. How many subsets does the new group E have?

3) Calculate the LU decomposition of the following matrix, or if need, the matrix we get from changing lines
1 2 3
-1 -2 1
2 -3 5
I've never heard or seen the words LU decomposition, no idea what to do here.

4) We are given 2 matrixes, A, and B, both are of the size n*n
and that the trace of A (sum of the diagonal line of A) tr(A) is not -1.
the goal of this question is to find the matrix M so that:
M+tr(M)*A=B
a) prove that tr(M)= tr(b)/[1+tr(A)]
b) show that M = B - [tr(b)/(a+tr(A))]*A

I have more questions but this is enough for now...I'd really appreciate any help I can get, and please explain your answers. I want to understand.
OriaG is offline  
 
Reply

  My Math Forum > College Math Forum > Applied Math

Tags
essay, needed, uni



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
mathematically related essay topic gaussrelatz Applied Math 4 September 26th, 2013 04:37 AM
Essay writings lizartt New Users 1 August 4th, 2011 09:26 PM
**URGENT PLS HELP: Integration/Differentiation/Essay Qns** Achitots Calculus 1 August 30th, 2010 03:00 AM
Game Theory - IB Extended Essay moritz Applied Math 2 December 31st, 1969 04:00 PM
mathematically related essay topic gaussrelatz New Users 1 December 31st, 1969 04:00 PM





Copyright © 2018 My Math Forum. All rights reserved.