%-------------------------------------------------------------------------------
% UF Sparse Matrix Collection, Tim Davis
% http://www.cise.ufl.edu/research/sparse/matrices/Quaglino/viscoplastic2
% name: Quaglino/viscoplastic2
% [FEM discretization of a viscoplastic collision problem, Alessio Quaglino]
% id: 1869
% date: 2007
% author: A. Quaglino
% ed: T. Davis
% fields: name title A b id date author ed kind notes aux
% aux: C
% kind: materials problem
%-------------------------------------------------------------------------------
% notes:
% The matrix is in the form [A11 A12 ; A21 A22] where A11 and A22 are diagonal. 
% Originally, the matrices in this set were poorly scaled, but this was resolved
% by a scale factor of the form [A11 A12*e ; A21/e A4] where the scalar e is    
% of magnitude 1e2 but can be 1e6 or 1e7 for a stiff material.  The Problem.A   
% matrix is the properly scaled problem.  The Problem.aux.C{1:7} matrices have  
% been "unscaled" with a factor e = 10.^(-(1:7)), to give a sequence of matrices
% that are well scaled to poorly scaled, and thus well conditioned (C{1}) to    
% poorly conditioned (C{7}).  This mimics the original poorly scaled and ill-   
% conditioned problem, and may be of interest for those developing algorithms   
% for automatic scaling.  From a FEM discretization of a viscoplastic collision 
% problem, Alessio Quaglino.                                                    
%-------------------------------------------------------------------------------
