expose k_if_fermion and k_if_boson

Author: jasonkaye

Diff for: c++/cppdlr/dlr_kernels.cpp

@@ -31,9 +31,7 @@ namespace cppdlr {
     }
   }
 
-  double k_it(double t, double om, double beta) {
-    return k_it(t, beta * om);
-  }
+  double k_it(double t, double om, double beta) { return k_it(t, beta * om); }
 
   double k_it_abs(double t, double om) {
 
@@ -61,8 +59,6 @@ namespace cppdlr {
       return k_if_boson(n, om);
   }
 
-  std::complex<double> k_if(int n, double om, statistic_t statistic, double beta) {
-    return beta * k_if(n, beta * om, statistic);
-  }
-    
+  std::complex<double> k_if(int n, double om, statistic_t statistic, double beta) { return beta * k_if(n, beta * om, statistic); }
+
 } // namespace cppdlr

Diff for: c++/cppdlr/dlr_kernels.hpp

@@ -68,6 +68,34 @@ namespace cppdlr {
   */
   double k_it_abs(double t, double om);
 
+  /**
+  * @brief Evaluate fermionic analytic continuation kernel in imaginary frequency using
+  * dimensionless variables (beta = 1)
+  *
+  * @param[in] n Imaginary frequency index
+  * @param[in] om Real frequency value
+  *
+  * @return Value K(i nu_n, om) of analytic continuation kernel
+  *
+  * \note The definition of the fermionic analytic continuation kernel using dimensionless
+  * variables is K(i nu_n, om) = 1 / (i nu_n - om) with i nu_n = (2n+1) * i * pi. 
+  */
+  std::complex<double> k_if_fermion(int n, double om);
+
+  /**
+  * @brief Evaluate bosonic analytic continuation kernel in imaginary frequency using
+  * dimensionless variables (beta = 1)
+  *
+  * @param[in] n Imaginary frequency index
+  * @param[in] om Real frequency value
+  *
+  * @return Value K(i nu_n, om) of analytic continuation kernel
+  *
+  * \note The definition of the bosonic analytic continuation kernel using dimensionless
+  * variables is K(i nu_n, om) = 1 / (i nu_n - om) with i nu_n = 2n * i * pi.
+  */
+  std::complex<double> k_if_boson(int n, double om);
+
   /**
   * @brief Evaluate analytic continuation kernel in imaginary frequency using
   * dimensionless variables (beta = 1)
@@ -76,7 +104,7 @@ namespace cppdlr {
   * @param[in] om Real frequency value
   * @param[in] statistic Particle Statistic: Boson or Fermion
   *
-  * @return Value K(i nu_n,om) of analytic continuation kernel
+  * @return Value K(i nu_n, om) of analytic continuation kernel
   *
   * \note The definition of the analytic continuation kernel using dimensionless
   * variables is K(i nu_n, om) = 1 / (i nu_n - om) with i nu_n = (2n+1) * i *
@@ -93,7 +121,7 @@ namespace cppdlr {
   * @param[in] statistic Particle Statistic: Boson or Fermion
   * @param[in] beta Inverse temperature
   *
-  * @return Value K(i nu_n,om) of analytic continuation kernel
+  * @return Value K(i nu_n, om) of analytic continuation kernel
   *
   * \note The definition of the analytic continuation kernel at a given inverse
   * temperature beta is K(i nu_n, om) = 1 / (i nu_n - om) with i nu_n = (2n+1) *