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trixi-framework · Nov 6, 2024 · 749a505 · 749a505
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diff --git a/examples/tree_1d_dgsem/elixir_hypdiff_nonperiodic_perk4.jl b/examples/tree_1d_dgsem/elixir_hypdiff_nonperiodic_perk4.jl
@@ -44,7 +44,7 @@ analysis_callback = AnalysisCallback(semi, interval = analysis_interval)
 
 alive_callback = AliveCallback(analysis_interval = analysis_interval)
 
-# Construct third order paired explicit Runge-Kutta method with 8 stages for given simulation setup.
+# Construct fourth order paired explicit Runge-Kutta method with 11 stages for given simulation setup.
 # Pass `tspan` to calculate maximum time step allowed for the bisection algorithm used 
 # in calculating the polynomial coefficients in the ODE algorithm.                                     
 ode_algorithm = Trixi.PairedExplicitRK4(11, tspan, semi)

diff --git a/src/time_integration/paired_explicit_runge_kutta/methods_PERK4.jl b/src/time_integration/paired_explicit_runge_kutta/methods_PERK4.jl
@@ -105,6 +105,8 @@ end
                       cS3 = 1.0f0)
     PairedExplicitRK4(num_stages, tspan, semi::AbstractSemidiscretization;
                       verbose = false, cS3 = 1.0f0)
+    PairedExplicitRK4(num_stages, tspan, eig_vals::Vector{ComplexF64};
+                      verbose = false, cS3 = 1.0f0)
 
     Parameters:
     - `num_stages` (`Int`): Number of stages in the paired explicit Runge-Kutta (P-ERK) method.