MxN_Mapping(const ProcessorGroup& source_group, const ProcessorGroup& target_group, const DECOptions& dec_options);
virtual ~MxN_Mapping();
void addElementFromSource(int distant_proc, int distant_elem);
MxN_Mapping(const ProcessorGroup& source_group, const ProcessorGroup& target_group, const DECOptions& dec_options);
virtual ~MxN_Mapping();
void addElementFromSource(int distant_proc, int distant_elem);