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gauss-jordan elimination, laplace determinant algorithms
Gauss-Jordan and Recursive Laplace Methodologies Evan Perry Grove, 2017 This repository contains some matrix algorithms. Everything here is in C++, compiled using g++ on Kubuntu 16.04. Contents: ./ rref_approx.cpp returns the row echelon form (REF) and the reduced row echelon Form (RREF) of an augmented matrix specified by user inputs using Gauss-Jordan elimination. Also shows the exact steps it took to reach the results. determinant.cpp finds the determinant of the inputted matrix using a recursive form of the Laplace method. Uses a self-referencing command in order to recursively dissect any given matrix into smaller parts. Known Issues: RESOLVED 2/5/2017: rref_approx.cpp: If any of the diagonal elements (1,1) thru (n-1,n-1) etc are equal to zero, the correct REF and RREF forms are not always returned. SOLUTION: Before going into the elimination algorithms, if a row has a zero where we don't want it to have a zero, switch that row with another one. Keep doing that until there's nonzeros wherever they are needed. Not a pretty solution, but programatically very simple.
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