/usr/include/trilinos/Stokhos_RysBasis.hpp is in libtrilinos-stokhos-dev 12.12.1-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 | // @HEADER
// ***********************************************************************
//
// Stokhos Package
// Copyright (2009) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Eric T. Phipps (etphipp@sandia.gov).
//
// ***********************************************************************
// @HEADER
#ifndef STOKHOS_RYSBASIS_HPP
#define STOKHOS_RYSBASIS_HPP
#include "Stokhos_DiscretizedStieltjesBasis.hpp"
namespace Stokhos {
//! Rys polynomial basis
/*!
* Rys polynomials are polynomials orthogonal with respect to the weight
* function
* \f[
* w(x) = e^{\frac{-x^2}{2}}
* \f]
* defined on the interval \f$[-c,c]\f$, for a given choice of \f$c\f$. The
* corresponding density \f$\rho(x)\f$ is obtained by scaling \f$w(x)\f$ to
* unit probability.
*
* The coefficients of the corresponding three-term recursion are generated
* using the Discretized Stieltjes procedure implemented by
* Stokhos::DiscretizedStieltjesBasis.
*/
template <typename ordinal_type, typename value_type>
class RysBasis :
public DiscretizedStieltjesBasis<ordinal_type, value_type> {
public:
//! Constructor
/*!
* \param p order of the basis
* \param c defines domain of support of weight function
* \param normalize whether polynomials should be given unit norm
*/
RysBasis(ordinal_type p, value_type c, bool normalize,
GrowthPolicy growth = SLOW_GROWTH) :
DiscretizedStieltjesBasis<ordinal_type,value_type>(
"Rys", p, rysWeight, -c, c, normalize, growth) {}
//! Destructor
~RysBasis() {}
//! The Rys weight function
static value_type rysWeight(const value_type& x) {
return std::exp(-x*x/2.0);
}
/*!
* \brief Clone this object with the option of building a higher order
* basis.
*/
/*!
* This method is following the Prototype pattern (see Design Pattern's textbook).
* The slight variation is that it allows the order of the polynomial to be modified,
* otherwise an exact copy is formed. The use case for this is creating basis functions
* for column indices in a spatially varying adaptive refinement context.
*/
virtual Teuchos::RCP<OneDOrthogPolyBasis<ordinal_type,value_type> > cloneWithOrder(ordinal_type p) const
{ return Teuchos::rcp(new RysBasis<ordinal_type,value_type>(p,*this)); }
protected:
//! Copy constructor with specified order
RysBasis(ordinal_type p, const RysBasis& basis) :
DiscretizedStieltjesBasis<ordinal_type,value_type>(p, basis) {}
private:
// Prohibit copying
RysBasis(const RysBasis&);
// Prohibit Assignment
RysBasis& operator=(const RysBasis& b);
}; // class RysBasis
} // Namespace Stokhos
#endif
|