Move IMEXEuler and IMEXEulerARK

Author: ChrisRackauckas

lib/OrdinaryDiffEqBDF/src/OrdinaryDiffEqBDF.jl

@@ -36,6 +36,6 @@ include("controllers.jl")
 include("bdf_perform_step.jl")
 
 export ABDF2, QNDF1, QBDF1, QNDF2, QBDF2, QNDF, QBDF, FBDF,
-       SBDF2, SBDF3, SBDF4, MEBDF2
+       SBDF2, SBDF3, SBDF4, MEBDF2, IMEXEuler, IMEXEulerARK
 
 end

lib/OrdinaryDiffEqBDF/src/algorithms.jl

@@ -331,3 +331,60 @@ QBDF: Multistep Method
 An alias of `QNDF` with κ=0.
 """
 QBDF(; kwargs...) = QNDF(; kappa = tuple(0 // 1, 0 // 1, 0 // 1, 0 // 1, 0 // 1), kwargs...)
+
+"""
+    IMEXEuler(;kwargs...)
+
+The one-step version of the IMEX multistep methods of
+
+  - Uri M. Ascher, Steven J. Ruuth, Brian T. R. Wetton.
+    Implicit-Explicit Methods for Time-Dependent Partial Differential Equations.
+    Society for Industrial and Applied Mathematics.
+    Journal on Numerical Analysis, 32(3), pp 797-823, 1995.
+    doi: [https://doi.org/10.1137/0732037](https://doi.org/10.1137/0732037)
+
+When applied to a `SplitODEProblem` of the form
+
+```
+u'(t) = f1(u) + f2(u)
+```
+
+The default `IMEXEuler()` method uses an update of the form
+
+```
+unew = uold + dt * (f1(unew) + f2(uold))
+```
+
+See also `SBDF`, `IMEXEulerARK`.
+"""
+IMEXEuler(; kwargs...) = SBDF(1; kwargs...)
+
+"""
+    IMEXEulerARK(;kwargs...)
+
+The one-step version of the IMEX multistep methods of
+
+  - Uri M. Ascher, Steven J. Ruuth, Brian T. R. Wetton.
+    Implicit-Explicit Methods for Time-Dependent Partial Differential Equations.
+    Society for Industrial and Applied Mathematics.
+    Journal on Numerical Analysis, 32(3), pp 797-823, 1995.
+    doi: [https://doi.org/10.1137/0732037](https://doi.org/10.1137/0732037)
+
+When applied to a `SplitODEProblem` of the form
+
+```
+u'(t) = f1(u) + f2(u)
+```
+
+A classical additive Runge-Kutta method in the sense of
+[Araújo, Murua, Sanz-Serna (1997)](https://doi.org/10.1137/S0036142995292128)
+consisting of the implicit and the explicit Euler method given by
+
+```
+y1   = uold + dt * f1(y1)
+unew = uold + dt * (f1(unew) + f2(y1))
+```
+
+See also `SBDF`, `IMEXEuler`.
+"""
+IMEXEulerARK(; kwargs...) = SBDF(1; ark = true, kwargs...)

lib/OrdinaryDiffEqSDIRK/src/OrdinaryDiffEqSDIRK.jl

@@ -32,7 +32,7 @@ export ImplicitEuler, ImplicitMidpoint, Trapezoid, TRBDF2, SDIRK2, SDIRK22,
        Kvaerno3, KenCarp3, Cash4, Hairer4, Hairer42, SSPSDIRK2, Kvaerno4,
        Kvaerno5, KenCarp4, KenCarp47, KenCarp5, KenCarp58, ESDIRK54I8L2SA, SFSDIRK4,
        SFSDIRK5, CFNLIRK3, SFSDIRK6, SFSDIRK7, SFSDIRK8, Kvaerno5, KenCarp4, KenCarp5,
-       SFSDIRK4, SFSDIRK5, CFNLIRK3, SFSDIRK6, IMEXEuler, IMEXEulerARK,
+       SFSDIRK4, SFSDIRK5, CFNLIRK3, SFSDIRK6,
        SFSDIRK7, SFSDIRK8, ESDIRK436L2SA2, ESDIRK437L2SA, ESDIRK547L2SA2, ESDIRK659L2SA
 
 end

lib/OrdinaryDiffEqSDIRK/src/algorithms.jl

@@ -130,63 +130,6 @@ end
 
 TruncatedStacktraces.@truncate_stacktrace TRBDF2
 
-"""
-    IMEXEuler(;kwargs...)
-
-The one-step version of the IMEX multistep methods of
-
-  - Uri M. Ascher, Steven J. Ruuth, Brian T. R. Wetton.
-    Implicit-Explicit Methods for Time-Dependent Partial Differential Equations.
-    Society for Industrial and Applied Mathematics.
-    Journal on Numerical Analysis, 32(3), pp 797-823, 1995.
-    doi: [https://doi.org/10.1137/0732037](https://doi.org/10.1137/0732037)
-
-When applied to a `SplitODEProblem` of the form
-
-```
-u'(t) = f1(u) + f2(u)
-```
-
-The default `IMEXEuler()` method uses an update of the form
-
-```
-unew = uold + dt * (f1(unew) + f2(uold))
-```
-
-See also `SBDF`, `IMEXEulerARK`.
-"""
-IMEXEuler(; kwargs...) = SBDF(1; kwargs...)
-
-"""
-    IMEXEulerARK(;kwargs...)
-
-The one-step version of the IMEX multistep methods of
-
-  - Uri M. Ascher, Steven J. Ruuth, Brian T. R. Wetton.
-    Implicit-Explicit Methods for Time-Dependent Partial Differential Equations.
-    Society for Industrial and Applied Mathematics.
-    Journal on Numerical Analysis, 32(3), pp 797-823, 1995.
-    doi: [https://doi.org/10.1137/0732037](https://doi.org/10.1137/0732037)
-
-When applied to a `SplitODEProblem` of the form
-
-```
-u'(t) = f1(u) + f2(u)
-```
-
-A classical additive Runge-Kutta method in the sense of
-[Araújo, Murua, Sanz-Serna (1997)](https://doi.org/10.1137/S0036142995292128)
-consisting of the implicit and the explicit Euler method given by
-
-```
-y1   = uold + dt * f1(y1)
-unew = uold + dt * (f1(unew) + f2(y1))
-```
-
-See also `SBDF`, `IMEXEuler`.
-"""
-IMEXEulerARK(; kwargs...) = SBDF(1; ark = true, kwargs...)
-
 """
 @article{hindmarsh2005sundials,
 title={{SUNDIALS}: Suite of nonlinear and differential/algebraic equation solvers},

src/OrdinaryDiffEq.jl

@@ -272,13 +272,13 @@ export ImplicitEuler, ImplicitMidpoint, Trapezoid, TRBDF2, SDIRK2, SDIRK22,
        Kvaerno3, KenCarp3, Cash4, Hairer4, Hairer42, SSPSDIRK2, Kvaerno4,
        Kvaerno5, KenCarp4, KenCarp47, KenCarp5, KenCarp58, ESDIRK54I8L2SA, SFSDIRK4,
        SFSDIRK5, CFNLIRK3, SFSDIRK6, SFSDIRK7, SFSDIRK8, Kvaerno5, KenCarp4, KenCarp5,
-       SFSDIRK4, SFSDIRK5, CFNLIRK3, SFSDIRK6, IMEXEuler, IMEXEulerARK,
+       SFSDIRK4, SFSDIRK5, CFNLIRK3, SFSDIRK6,
        SFSDIRK7, SFSDIRK8, ESDIRK436L2SA2, ESDIRK437L2SA, ESDIRK547L2SA2, ESDIRK659L2SA
 
 include("../lib/OrdinaryDiffEqBDF/src/OrdinaryDiffEqBDF.jl")
 using ..OrdinaryDiffEqBDF
 export ABDF2, QNDF1, QBDF1, QNDF2, QBDF2, QNDF, QBDF, FBDF,
-       SBDF2, SBDF3, SBDF4, MEBDF2
+       SBDF2, SBDF3, SBDF4, MEBDF2, IMEXEuler, IMEXEulerARK
 
 include("../lib/OrdinaryDiffEqDefault/src/OrdinaryDiffEqDefault.jl")
 using ..OrdinaryDiffEqDefault