.. _R6.02.02:

**r6.02.02** Linear solver using the multifrontal method MULT_FRONT
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**Summary:**

The multifrontal method MULT_FRONT is a direct method particularly suited to the resolution of linear systems whose matrix is sparse. This method includes a preliminary renumbering phase intended to minimize the filling of the matrix during factorization.

This phase also makes it possible to group variables into "super-variables" or "super-nodes". Factorization, on the other hand, is carried out in the form of a sequence of elimination of supernodes, in full matrices. These full matrices allow the use of optimized routines like BLAS, which obtain the best performances on vector or scalar machines.

With the factored matrix, each system resolution will only require an inexpensive "descent/ascent".

 **Table of Contents**




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    self

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    Description_de_la_m_thode
    Implantation_et_utilisation_dans_Code_Aster
    Bibliographie
    Description_des_versions_du_document