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WIP: Initial IMEX tableau abstraction with generic perform_step! (ARS… #3196

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WIP: Initial IMEX tableau abstraction with generic perform_step! (ARS… #3196

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d1278a5
WIP: Initial IMEX tableau abstraction with generic perform_step! (ARS…
Mar 19, 2026
bdc14dc
WIP: IMEX tableau prototype - fix perform_step and formatting
Mar 19, 2026
cb2dbd3
Fix IMEX prototype: remove ARS343 re-export (LTS safe)
Mar 20, 2026
58c9be4
Fix initialize! return values for IMEX caches (ensure return nothing)
Mar 20, 2026
1c2d108
refactor(IMEX): migrate KenCarp/Kvaerno to IMEXTableau and remove per…
Mar 23, 2026
8ee2b9f
Refactor: restrict IMEX implementation to ESDIRK methods and address …
Mar 24, 2026
8e3a179
Cleanup: remove redundant @.. broadcast=false usage
Mar 24, 2026
d9c6e02
Reset Project.toml to upstream master
Mar 25, 2026
d2430c5
Fix ARS343 embedded error estimator (satisfy order conditions for ada…
Mar 25, 2026
07123d2
Revert ARS343 embedded estimator change
Mar 25, 2026
2f49b48
Make ARS343 non-adaptive via btilde = nothing and guard adaptive path
Mar 25, 2026
b8bdd3f
refactor(IMEX): migrate remaining ESDIRK methods to tableau-based imp…
Mar 27, 2026
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2 changes: 2 additions & 0 deletions lib/OrdinaryDiffEqCore/src/algorithms.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,8 @@ abstract type OrdinaryDiffEqAdaptiveImplicitAlgorithm{CS, AD, FDT, ST, CJ} <:
OrdinaryDiffEqAdaptiveAlgorithm end
abstract type OrdinaryDiffEqNewtonAdaptiveAlgorithm{CS, AD, FDT, ST, CJ} <:
OrdinaryDiffEqAdaptiveImplicitAlgorithm{CS, AD, FDT, ST, CJ} end
abstract type OrdinaryDiffEqNewtonAdaptiveESDIRKAlgorithm{CS, AD, FDT, ST, CJ} <:
OrdinaryDiffEqNewtonAdaptiveAlgorithm{CS, AD, FDT, ST, CJ} end
abstract type OrdinaryDiffEqRosenbrockAdaptiveAlgorithm{CS, AD, FDT, ST, CJ} <:
OrdinaryDiffEqAdaptiveImplicitAlgorithm{CS, AD, FDT, ST, CJ} end

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6 changes: 5 additions & 1 deletion lib/OrdinaryDiffEqSDIRK/src/OrdinaryDiffEqSDIRK.jl
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Expand Up @@ -6,6 +6,7 @@ import OrdinaryDiffEqCore: alg_order, calculate_residuals!,
OrdinaryDiffEqAlgorithm,
OrdinaryDiffEqMutableCache, OrdinaryDiffEqConstantCache,
OrdinaryDiffEqNewtonAdaptiveAlgorithm,
OrdinaryDiffEqNewtonAdaptiveESDIRKAlgorithm,
OrdinaryDiffEqNewtonAlgorithm,
DEFAULT_PRECS,
OrdinaryDiffEqAdaptiveAlgorithm, CompiledFloats, uses_uprev,
Expand Down Expand Up @@ -37,13 +38,16 @@ include("kencarp_kvaerno_caches.jl")
include("sdirk_perform_step.jl")
include("kencarp_kvaerno_perform_step.jl")
include("sdirk_tableaus.jl")
include("imex_tableaus.jl")
include("generic_imex_perform_step.jl")

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,
SFSDIRK7, SFSDIRK8, ESDIRK436L2SA2, ESDIRK437L2SA, ESDIRK547L2SA2, ESDIRK659L2SA
SFSDIRK7, SFSDIRK8, ESDIRK436L2SA2, ESDIRK437L2SA, ESDIRK547L2SA2, ESDIRK659L2SA,
ARS343

import PrecompileTools
import Preferences
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3 changes: 3 additions & 0 deletions lib/OrdinaryDiffEqSDIRK/src/alg_utils.jl
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Expand Up @@ -57,3 +57,6 @@ issplit(alg::KenCarp47) = true
issplit(alg::KenCarp5) = true
issplit(alg::KenCarp58) = true
issplit(alg::CFNLIRK3) = true
issplit(alg::ARS343) = true
alg_order(alg::ARS343) = 3
isesdirk(alg::ARS343) = true
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