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稀疏矩阵运算库C++版本的

  Sparse BLAS (Basic Linear Algebra Subprograms) Library
	Version 1.0
 
  Mathematical and Computational Sciences Division
  National Institute of Technology,
  Gaithersburg, MD USA
 
  A C++ implementation of the routines specified by the ANSI C 
  interface specification of the Sparse BLAS in the BLAS Technical 
  Forum Standard[1].   For details, see [2].
 
  This file requires three header files from the standard specification:
  "blas_sparse.h", "blas_enum.h", and "blas_sparse_proto.h".  These are
	available from [1], and included in this distribution for convenience.  
	Make sure the include files are placed in a location visible to the 
	compiler.  To compile, use something similar to

		c++ -c nist_spblas.cc

	to create an object file.  You can then convert or add this object file 
	to a library, although this is not necessary.
 
  [1] BLAS Technical Forum: www.netlib.org/blas/blast-forum/
  [2] I. S. Duff, M. A. Heroux, R. Pozo, "An Overview of the Sparse Basic
      Linear Algebra Subprograms: The new standard of the BLAS Techincal
      Forum,"  Vol. 28, No. 2, pp. 239-267,ACM Transactions on Mathematical 
      Software (TOMS), 2002.