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Merged
Microno95 merged 3 commits into from
Oct 15, 2025
Merged

Update explicit_integration_schemes.py #9

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b44c7ac
Update explicit_integration_schemes.py
Microno95 Oct 15, 2025
d780e42
Update __init__.py
Microno95 Oct 15, 2025
2cb4e12
Update explicit_integration_schemes.py
Microno95 Oct 15, 2025
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1 change: 1 addition & 0 deletions desolver/integrators/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@
RK4Solver,
MidpointSolver,
HeunsSolver,
RalstonsSolver,
EulerSolver,
EulerTrapSolver,
HeunEulerSolver,
Expand Down
23 changes: 21 additions & 2 deletions desolver/integrators/explicit_integration_schemes.py
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Expand Up @@ -11,6 +11,7 @@
'RK4Solver',
'MidpointSolver',
'HeunsSolver',
'RalstonsSolver',
'EulerSolver',
'EulerTrapSolver',
'HeunEulerSolver',
Expand Down Expand Up @@ -242,14 +243,14 @@ class MidpointSolver(RungeKuttaIntegrator):
[[0, 0, 1]], dtype=numpy.float64
)

class HeunsSolver(RungeKuttaIntegrator):
class RalstonsSolver(RungeKuttaIntegrator):
"""
The derived class that implements Heun's method.
"""

__order__ = 2.0

__alt_names__ = ("Explicit Heun's", "Heun's")
__alt_names__ = ("Explicit Ralston's", "Ralston's")

tableau_intermediate = numpy.array(
[[0, 0, 0 ],
Expand All @@ -260,6 +261,24 @@ class HeunsSolver(RungeKuttaIntegrator):
[[0, 1/4, 3/4]], dtype=numpy.float64
)

class HeunsSolver(RungeKuttaIntegrator):
"""
The derived class that implements Heun's method.
"""

__order__ = 2.0

__alt_names__ = ("Explicit Heun's", "Heun's")

tableau_intermediate = numpy.array(
[[0, 0, 0],
[1, 1, 0]], dtype=numpy.float64
)

tableau_final = numpy.array(
[[0, 1/2, 1/2]], dtype=numpy.float64
)

class EulerSolver(RungeKuttaIntegrator):
"""
The derived class that implements the Euler method.
Expand Down
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