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Stokhos_KL_ProductEigenPair.hpp
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41
42#ifndef STOKHOS_KL_PRODUCT_EIGENPAIR_HPP
43#define STOKHOS_KL_PRODUCT_EIGENPAIR_HPP
44
45#include "Teuchos_Array.hpp"
46
47namespace Stokhos {
48
49 namespace KL {
50
52 template <typename eigen_function_type, typename ExecutionSpace>
54
55 typedef typename eigen_function_type::value_type value_type;
56 typedef ExecutionSpace execution_space;
57 typedef OneDEigenPair<eigen_function_type> one_d_eigen_pair_type;
58 typedef Teuchos::Array<one_d_eigen_pair_type> eig_pair_type;
59
62
65
68
72
75 if (this != &ep) {
76 eig_val = ep.eig_val;
77 eig_pairs = ep.eig_pairs;
78 }
79 return *this;
80 }
81
83 void set(const Teuchos::Array<one_d_eigen_pair_type>& ep) {
84 eig_val = 1.0;
85 eig_pairs = ep;
86 std::size_t sz = eig_pairs.size();
87 for (std::size_t i=0; i<sz; i++)
89 }
90
92 template <typename point_type>
93 KOKKOS_INLINE_FUNCTION
94 value_type evalEigenfunction(const point_type& x) const {
95 value_type result = 1.0;
96 std::size_t sz = eig_pairs.size();
97 for (std::size_t i=0; i<sz; i++)
98 result *= eig_pairs[i].eig_func.evaluate(x[i]);
99 return result;
100 }
101
103 void print(std::ostream& os) const {
104 os << eig_val << ", ";
105 std::size_t sz = eig_pairs.size();
106 for (std::size_t i=0; i<sz-1; i++) {
107 os << "(";
108 eig_pairs[i].eig_func.print(os);
109 os << ") * ";
110 }
111 os << "(";
112 eig_pairs[eig_pairs.size()-1].eig_func.print(os);
113 os << ")";
114 }
115 };
116
117 template <typename E, typename D>
118 std::ostream&
119 operator << (std::ostream& os, const ProductEigenPair<E,D>& f) {
120 f.print(os);
121 return os;
122 }
123
125 template <typename E, typename D>
127 public std::binary_function<ProductEigenPair<E,D>,
128 ProductEigenPair<E,D>,
129 bool> {
130 bool operator() (const ProductEigenPair<E,D>& a,
131 const ProductEigenPair<E,D>& b) {
132 return a.eig_val > b.eig_val;
133 }
134 }; // struct ProductEigenPairGreater
135
136 } // namespace KL
137
138} // namespace Stokhos
139
140#endif // STOKHOS_KL_PRODUCT_EIGENPAIR_HPP
ScalarType f(const Teuchos::Array< ScalarType > &x, double a, double b)
std::ostream & operator<<(std::ostream &os, const ProductEigenPair< E, D > &f)
Top-level namespace for Stokhos classes and functions.
Predicate class for sorting product eigenfunctions based on eigenvalue.
bool operator()(const ProductEigenPair< E, D > &a, const ProductEigenPair< E, D > &b)
Container for multi-dimensional product of 1-D eigenfunctions/values.
void set(const Teuchos::Array< one_d_eigen_pair_type > &ep)
Set eigen pairs.
ProductEigenPair & operator=(const ProductEigenPair &ep)
Assignment.
ProductEigenPair(const ProductEigenPair &ep)
Copy constructor.
value_type eig_val
Product eigenvalue.
eig_pair_type eig_pairs
Eigenpairs for each dimension.
KOKKOS_INLINE_FUNCTION value_type evalEigenfunction(const point_type &x) const
Evaluate eigenfunction at a given point.
eigen_function_type::value_type value_type
OneDEigenPair< eigen_function_type > one_d_eigen_pair_type
void print(std::ostream &os) const
Print eigenpair.
Teuchos::Array< one_d_eigen_pair_type > eig_pair_type