# Linear & Abstract Algebra

- Vector spaces and linear transformations. Groups and other algebraic structures along with Number Theory.
RSS Search this Forum
 Views: 8,344 Announcement: Two free ways to get Gold Membership! Jan17-12 Meta Thread / Thread Starter Last Post Replies Views Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions... Feb23-13 10:24 AM micromass 1 29,789 Hi guys, Let's say I have a 6x6 matrix A whose Jordan form J has 3 Jordan blocks. It means that this matrix (matrix... Dec3-12 11:24 PM fluidistic 18 2,626 How are orbits and cosets related? Are all orbits cosets? Are all cosets orbits? Also, what exactly are G-sets and... Nov30-12 11:09 AM lavinia 1 994 Linear transformation f:C^∞(R) -> C^∞(R) f(x(t)) = x'(t) a) I have to set up the eigenvalue-problem and... Nov27-12 09:16 PM HallsofIvy 2 902 Hello, I want to find a family of functions \phi:\mathbb{R} \rightarrow \mathbb{C} that have the property:... Nov28-12 04:30 PM lavinia 14 1,534 I thought it would be obvious, but I can't find a series representation of the Laplace transform. I'm looking for... Nov29-12 09:48 AM lurflurf 2 782 Sorry about the long title. I recently had a few homework problems which were similar to the title of the post. I... Nov27-12 03:46 PM Szichedelic 1 645 Ok I understand the concept of infinite countability and that say the set of all rational #s is infinitely countable,... Nov27-12 06:43 PM Mark44 1 1,501 I have two 3d applications and when an object(a cube for example) is transferred between them, the rotation values of... Nov28-12 09:06 AM HallsofIvy 3 719 It's very difficult for me to find any simple literature to explain this idea. J\inMn(ℂ) is a coninvolutory (or a... Nov29-12 02:42 PM rasmhop 4 830 Hello, let's suppose I have two functions f,g\in L^2(\mathbb{R}) and I consider the inner product \left\langle f,g... Nov29-12 07:54 PM Stephen Tashi 7 1,239 Given two systems, Ax=b and Cy=d, for nxn matrices A and C, and n-dimensional vectors b and d, each of which has at... Dec1-12 01:21 PM Erland 1 813 The following problem was given on a test of mine and I got it completely wrong. If anyone can help me with solving... Nov29-12 07:09 PM jgens 1 658 After solving some problems about matrix invertibility and learning some theorems (and proving them), I have developed... Dec1-12 02:22 PM Bipolarity 2 732 Hi guys I wonder if you know any linear algebra formalism or something to solve the following question... Dec3-12 11:37 AM phynewb 3 927 I now know that inverses are only defined for square matrices. My question is: is this because inverses for non-square... Dec2-12 07:57 AM HallsofIvy 8 956 let A_i be an odd integer, s_i be the square of a_i and t_i be the triangular number, (s_i -1)/8. Same for a_j , s_j,... Dec1-12 11:25 PM Norwegian 2 1,215 At first I thought that there is no square matrix whose square is the 0 matrix. But I found a counterexample to this.... Dec2-12 01:37 PM Bipolarity 5 963 Bocard's problem asks to find the solutions to the Diophantine equation n!=m^2-1. The only known (n,m) pairs are... Dec9-12 06:46 PM Someone2841 3 1,531 I am trying to find a way to generate solutions to 5b^2*c^2 = 4a^2(b^2+c^2) Can anyone offer some insight? I... Dec13-12 07:26 AM ramsey2879 55 6,445 the question is , if f(n)= 1+10+10^2 +... + 10^n , where n is integer. find the least n s.t. f(n) is divisible by 17... Dec5-12 10:33 AM Edgardo 3 1,136 Hi, If A is some nonsquare matrix that is possible rank-deficient, then am I right to understand that (A^T)(A) is a... Dec5-12 10:16 AM D H 1 1,495 Hi. There is a polynomial f = (x^3) + 2(x^2) + 1, f belongs to Q. It will be shown that the polynomial is irreducible... Dec5-12 07:36 PM Square1 1 674 I am curious about the proof of the fact that the value of a determinant computed using the Laplace (or cofactor)... Dec6-12 01:09 PM micromass 1 580 I need some help understanding the following definition: Definition: Let A\inMn(ℂ) the complex vector space ... Dec8-12 10:11 PM BrainHurts 4 740 Hi Can anyone help with understand a basic idea, I have a matrix A in MATLAB which is 100x3000. I have checked... Dec6-12 09:04 AM mikeph 2 638 If I have a matrix valued function A(x) of some scalar x, how do I compute the derivative of the square root of A with... Dec9-12 10:35 PM bpet 4 1,555 3.5036799918564934004113 I need help identifying this real number. The closest I have gotten is e+pi/4. But I... Dec10-12 12:53 AM haruspex 9 1,777 I recall a post previously where the Op was wondering if any circle about the orgin having an irrational radius could... Dec8-12 10:43 PM ramsey2879 4 1,216 I'm not a mathematician of any sort so excuse me if my question is stupid. I just realized that I could not define... Dec10-12 11:52 PM jedishrfu 3 1,293 on page 261 of this paper by J. Vermeer (http://www.math.technion.ac.il/iic/e..._pp258-283.pdf) he writes The... Dec9-12 10:38 PM BrainHurts 4 724 Is anyone interested in learning some algebra? I was planning to go through Dummit and Foote (I have some basic group... Dec9-12 02:56 AM sammycaps 0 602 The proof goes as follows: For contradiction, assume there exists |s|< ∞ such that s = {e1, e2, ... , en} and... Dec11-12 08:51 AM mfb 1 516 Ok I promise this time it is not a homework type question. If someone could direct with a name of a theorem here,... Dec12-12 09:54 PM Square1 3 702 I've been reading a few mathematical definitions and I'm still not sure I grasp their significance. If Ax = b, then... Dec13-12 05:42 AM mikeph 9 1,235 I'm still confused about L U matrix factorization. I'm trying to understand how to do it and why doing so is... Dec11-12 04:00 PM symbolipoint 4 937 Hi All, I've been following a group theory course which I am struggling with at the moment. I'm from 3 different... Dec11-12 08:36 AM AlbertEi 4 803 Hey! I am studying group theory for particle physicists right now and I came across the following general question... Dec11-12 02:24 AM CuriosusNN 0 538 I am not sure which rubric this belongs to, but since the zeta function is involved, I am putting it here. I noticed... Dec13-12 12:15 AM nomadreid 0 1,027 Can someone please explain to me, in as simple words as possible, what a quotient group is???? I hate my books... Dec13-12 09:05 PM algebrat 2 650 A 3x3 symmetric matrix has a null space of dimension one containing the vector (1,1,1). Find the bases and dimensions... Dec14-12 02:21 AM MoBaT 3 575

Display Options for Linear & Abstract Algebra Mentors
Showing threads 2441 to 2480 of 8352 Mentors : 2
 Sorted By Thread Title Last Post Time Thread Start Time Number of Replies Number of Views Thread Starter Thread Rating Sort Order Ascending Descending From The Last Day Last 2 Days Last Week Last 10 Days Last 2 Weeks Last Month Last 45 Days Last 2 Months Last 75 Days Last 100 Days Last Year Beginning
 Forum Tools Search this Forum Search this Forum :   Advanced Search