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Structure

CSRMatrix_ data type defines a sparse matrix in the CSR format. EASIFEM uses Sparsekit library for handling CSRMatrix_.

TYPE :: CSRMatrix_
  LOGICAL( LGT ) :: csrOwnership = .TRUE.
    !! This variable, if true, denotes that csr is allocated inside the obj
  INTEGER( I4B ) :: tDimension = 2_I4B
  CHARACTER( LEN = 5 ) :: matrixProp = 'UNSYM'
  REAL( DFP ), ALLOCATABLE :: A( : )
  TYPE( CSRSparsity_ ) :: csr
END TYPE CSRMatrix_
  • csrOwnerShip is true if memory for csr pointer is allocated while initiating an instance of CSRMatrix_.
  • tDimension is the dimension of the matrix, it should be 2
  • matrixProp, defines the properties of the matrix, this parameter is futuristic as it will be used for deploying optimized solvers based on the matrix properties.
  • A contains the matrix value
  • csr is an instance of CSRSparsity which contains the sparsity pattern.