{
    matrix_id: '2541',
    name: 'Serena',
    group: 'Janna',
    description: 'gas resevoir simulation for CO2 sequestration',
    author: 'C. Janna, M. Ferronato',
    editor: 'T. Davis',
    date: '2011',
    kind: 'structural problem',
    problem_2D_or_3D: '1',
    num_rows: '1391349',
    num_cols: '1391349',
    nonzeros: '64131971',
    num_explicit_zeros: '399730',
    num_strongly_connected_components: '9229',
    num_dmperm_blocks: '9229',
    structural_full_rank: 'true',
    structural_rank: '1391349',
    pattern_symmetry: '1.000',
    numeric_symmetry: '1.000',
    rb_type: 'real',
    structure: 'symmetric',
    cholesky_candidate: 'yes',
    positive_definite: 'yes',
    notes: 'Authors: Carlo Janna and Massimiliano Ferronato                    
                                                                   
Symmetric Positive Definite Matrix                                 
# equations:   1,391,349                                           
# non-zeroes: 64,531,701                                           
Problem description: structural problem                            
                                                                   
The matrix Serena is obtained from a structural problem            
discretizing a gas reservoir with tetrahedral Finite Elements.     
The medium is strongly heterogeneous and characterized by a        
complex geometry consisting of alternating sequences of thin       
clay and sand layers.  Some further information may be found       
in the paper:                                                      
                                                                   
M. Ferronato, G. Gambolati, C. Janna, P. Teatini. "Geomechanical   
issues of anthropogenic CO2 sequestration in exploited gas fields",
Energy Conversion and Management, 51, pp. 1918-1928, 2010.         
',
    image_files: 'Serena.png,Serena_dmperm.png,Serena_graph.gif,',
}
