libarpack++2-dev - 2.3-9 main

ARPACK++ is an object-oriented version of the ARPACK package. It consists a
collection of classes that offers c++ programmers an interface to ARPACK. It
preserves the full capability, performance, accuracy and low memory
requirements of the FORTRAN package, but takes advantage of the c++
object-oriented programming environment.
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ARPACK stands for ARnoldi PACKage and provides standard and
generalized eigenvalue solvers for sparse matrices that arises
typically from finite element codes. See the corresponding Debian
package.