119 rader
4.1 KiB
C++
119 rader
4.1 KiB
C++
/**********************************************************
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This software is part of J.-S. Caux's ABACUS library.
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Copyright (c).
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-----------------------------------------------------------
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File: JSC_Young.h
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Purpose: Declares Young tableau class.
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***********************************************************/
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#ifndef _YOUNG_
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#define _YOUNG_
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#include "JSC_Vect.h"
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namespace JSC {
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const int YOUNG_TABLEAU_ID_OPTION = 0;
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const long long int TABLEAU_ID_UPPER_LIMIT = 10000000LL;
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//***********************************************************************
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class Young_Tableau {
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public:
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int Nrows;
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int Ncols;
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int* Row_L;
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int* Col_L;
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long long int id; // identification number
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long long int maxid;
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long long int* map;
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bool map_computed;
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long long int idnr_reached;
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int nboxes_reached;
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private:
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int dimchoose;
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long long int* choose_table;
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public:
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Young_Tableau (); // empty constructor, does nothing
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Young_Tableau (int Nr, int Nc); // constructs empty tableau
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Young_Tableau (int Nr, int Nc, long long int idnr); // constructs the tableau corresponding to identification number idnr
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Young_Tableau (const Young_Tableau& RefTableau); // copy constructor
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Young_Tableau (int Nr, int Nc, const Young_Tableau& RefTableau);
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Young_Tableau& operator= (const Young_Tableau& RefTableau); // assignment
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~Young_Tableau (); // destructor
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public:
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Young_Tableau& Compute_Map (long long int idnr_to_reach); // fills the map vector
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Young_Tableau& Distribute_boxes (int nboxes_to_dist, int level);
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Young_Tableau& Set_to_id (long long int idnr); // sets the tableau to the one corresponding to idnr
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Young_Tableau& Set_to_id (long long int idnr, int option); // sets the tableau to the one corresponding to idnr according to rule option
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Young_Tableau& Set_Row_L (Vect<int>& Row_Lengths); // set row lengths
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Young_Tableau& Set_Col_L_given_Row_L (); // sets the Col_L array self-consistently
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Young_Tableau& Set_Row_L_given_Col_L (); // sets the Col_L array self-consistently
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long long int Compute_Descendent_id (int option, Vect<int>& Desc_Row_L, int Nrows_Desc, int Ncols_Desc,
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const Young_Tableau& RefTableau);
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Young_Tableau& Compute_id(); // computes the id number of tableau
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Young_Tableau& Compute_id(int option); // computes the id number of tableau according to rule option
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Young_Tableau& Print(); // couts the tableau
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bool Lower_Row (int i);
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bool Raise_Row (int i);
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bool Lower_Col (int i);
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bool Raise_Col (int i);
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bool Raise_Lowest_Nonzero_Row(); // adds a box to the lowest nonzero length Row, recomputes id, returns true if tableau has changed
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bool Raise_Next_to_Lowest_Nonzero_Row(); // same thing, but for Row under lowest nonzero length one.
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bool Move_Box_from_Col_to_Col (int ifrom, int ito);
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Vect<Young_Tableau> Descendents (int fixed_Nboxes);
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Vect<Young_Tableau> Descendents_Boosted_State (int fixed_Nboxes);
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int Add_Boxes_From_Lowest (int Nboxes); // tries to add Nboxes to Tableau, returns number of boxes added.
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};
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std::ostream& operator<< (std::ostream& s, const Young_Tableau& tableau);
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inline int Nr_Nonzero_Rows (const Vect<Young_Tableau>& Tableau_ref)
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{
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// This function checks the number of rows containing at least one box
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// in the whole vector of Young tableaux given as argument.
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// The usefulness is to force descent of states in which only a few
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// excitations have started dispersing.
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int nr_nonzero_rows = 0;
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for (int i = 0; i < Tableau_ref.size(); ++i)
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for (int alpha = 0; alpha < Tableau_ref[i].Nrows; ++alpha)
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if (Tableau_ref[i].Row_L[alpha] > 0) nr_nonzero_rows++;
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return(nr_nonzero_rows);
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}
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//***********************************************************************
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class Tableau_Map {
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public:
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Vect<long long int> map;
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long long int idnr_reached;
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int nboxes_reached;
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public:
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Tableau_Map (int Nrows, int Ncols);
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void Distribute_id (int nboxes_to_dist, int level, Young_Tableau& RefTableau);
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};
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} // namespace JSC
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#endif
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