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determining the qr decomposition of a symmetric tridiagonal matrix costs formula_5 operations.
determinar la descomposición qr de una matriz simétrica tridiagonal cuesta formula_5 operaciones.

* high performance algorithms for reduction to condensed (hessenberg, tridiagonal, bidiagonal) form
* high performance algorithms for reduction to condensed (hessenberg, tridiagonal, bidiagonal) form== véase también ==* matriz triangular

==properties==a tridiagonal matrix is a matrix that is both upper and lower hessenberg matrix.
una matriz tridiagonal es al mismo tiempo una matriz de hessenberg superior e inferior.

daasebre (professor) oti boateng developed in his doctoral thesis an algebraic algorithm for the exact inverse of symmetic tridiagonal matrices.
el daasebre (profesor) oti boateng desarrolló en su tesis doctoral un algoritmo algebraico sobre la inversa exacta de las matrices tridiagonales.

for example, the following matrix is tridiagonal::formula_1the determinant of a tridiagonal matrix is given by the continuant of its elements.
== propiedades ==el determinante de una matriz tridiagonal es el continuante de sus elementos, algo de significado en el contexto de las fracciones continuas.

in linear algebra, a tridiagonal matrix is a matrix that has nonzero elements only on the main diagonal, the first diagonal below this, and the first diagonal above the main diagonal.
en álgebra lineal se denomina matriz tridiagonal a una matriz cuyos elementos son solo distintos de cero en la diagonal principal y las diagonales adyacentes por encima y por debajo a esta.

* module for tri-diagonal linear systems* high performance algorithms for reduction to condensed (hessenberg, tridiagonal, bidiagonal) form* tridiagonal linear system solver in c++
* module for tri-diagonal linear systems* high performance algorithms for reduction to condensed (hessenberg, tridiagonal, bidiagonal) form