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The paper presents AMGCL -- an opensource C++ library implementing thealgebraic multigrid method (AMG) for solution of large sparse linear systems ofequations, usually arising from discretization of partial differentialequations on an unstructured grid. The library supports both shared anddistributed memory computation, allows to utilize modern massively parallelprocessors via OpenMP, OpenCL, or CUDA technologies, has minimal dependencies,and is easily extensible. The design principles behind AMGCL are discussed andit is shown that the code performance is on par with alternativeimplementations.

AMGCL: an Efficient, Flexible, and Extensible Algebraic Multigrid Implementation