Tharindu Rusira
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 Oct 6 awarded Critic Oct 30 revised What is the easy way to calculate the roots of $z^4+4z^3+6z^2+4z$? corrected the body Oct 30 suggested approved edit on What is the easy way to calculate the roots of $z^4+4z^3+6z^2+4z$? Jul 23 awarded Autobiographer May 22 revised Method of undetermined coefficients for the input functions associated with the unit step edited title May 22 comment Method of undetermined coefficients for the input functions associated with the unit step Oh I'm sorry @anorton, it was a mistake. Both x and y are functions of t. May 22 revised Method of undetermined coefficients for the input functions associated with the unit step corrected a mistake in the example May 21 comment Method of undetermined coefficients for the input functions associated with the unit step yes, it's the standard step. u(t)=1 for all t>=0 and otherwise u(t)=0 May 20 awarded Editor May 20 revised Method of undetermined coefficients for the input functions associated with the unit step corrected spelling May 20 asked Method of undetermined coefficients for the input functions associated with the unit step Nov 27 awarded Scholar Nov 27 comment Linear programmimg just great !!! loads of thanks :) a crystal clear explanation.. a proof rather, awesome... Nov 27 accepted Linear programmimg Nov 27 awarded Supporter Nov 27 comment Linear programmimg in simple words, I want to know how the extreme points are considered to be the only points within the feasible region that gives the optimum value. I hope I made myself clear... Nov 27 awarded Student Nov 27 asked Linear programmimg Nov 26 comment LU Decomposition Got it. thanks all... Nov 26 comment LU Decomposition Thanks, but my question was not how to decompose a matrix into LU. I wanted to know how to use pivoting when doing LU decomposition.