Stokhos_RysBasis.hpp

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// @HEADER
// *****************************************************************************
//                           Stokhos Package
//
// Copyright 2009 NTESS and the Stokhos contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef STOKHOS_RYSBASIS_HPP
#define STOKHOS_RYSBASIS_HPP

#include "Stokhos_DiscretizedStieltjesBasis.hpp"

namespace Stokhos {


  template <typename ordinal_type, typename value_type>
  class RysBasis : 
    public DiscretizedStieltjesBasis<ordinal_type, value_type> {
  public:
    

    RysBasis(ordinal_type ap, value_type c, bool anormalize, 
       GrowthPolicy agrowth = SLOW_GROWTH) :
      DiscretizedStieltjesBasis<ordinal_type,value_type>(
  "Rys", ap, rysWeight, -c, c, anormalize, agrowth) {}
    
    ~RysBasis() {}

    static value_type rysWeight(const value_type& x) { 
      return std::exp(-x*x/2.0); 
    }

    virtual Teuchos::RCP<OneDOrthogPolyBasis<ordinal_type,value_type> > cloneWithOrder(ordinal_type ap) const
    { return Teuchos::rcp(new RysBasis<ordinal_type,value_type>(ap,*this)); }

  protected:

    RysBasis(ordinal_type ap, const RysBasis& basis) : 
      DiscretizedStieltjesBasis<ordinal_type,value_type>(ap, basis) {}

  private:

    // Prohibit copying
    RysBasis(const RysBasis&);

    // Prohibit Assignment
    RysBasis& operator=(const RysBasis& b);
    
  }; // class RysBasis

} // Namespace Stokhos

#endif