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Feature/sunadjoint #559

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Feature/sunadjoint #559

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balos1
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@balos1 balos1 commented Aug 27, 2024

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A few minor changes on the added/updated content, and I did see one of my previous comments that may still require investigation (inside doc/arkode/guide/source/Usage/ARKStep/ASA.rst)

:param cs: The :c:type:`SUNAdjointCheckpointScheme` object
:param step_num: the step number of the checkpoint
:param stage_num: the stage number of the checkpoint
:param t: the time of the checkpoint
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t is not an argument to this function

Suggested change
:param t: the time of the checkpoint

(or if it is, then the signature above needs to be fixed)

:param keep: Keep data stored even after it is not needed anymore.
:param sunctx: The :c:type:`SUNContext` for the simulation.
:param check_scheme_ptr: Pointer to the newly constructed object.
:return: A :c:type:`SUNErrCode` indicating success or failure.
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Does this need a preceding blank line (like the other .. c:function:: blocks above)?

Suggested change
:return: A :c:type:`SUNErrCode` indicating success or failure.
:return: A :c:type:`SUNErrCode` indicating success or failure.


.. c:member:: SUNMatrix Jac

Matrix data for the Jacobian :math:`df/dy`.
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I apologize in advance, but the math professor in me needs these Jacobians to be denoted correctly (since $f$ is a function of multiple inputs, and $d$ typically represents the total derivative). I'll "suggest" the relevant changes here and below.

Suggested change
Matrix data for the Jacobian :math:`df/dy`.
Matrix data for the Jacobian :math:`\partial f/\partial y`.

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@balos1 balos1 Nov 13, 2024

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Good catch. It was not in :math: originally, it was plain text so\partial was not used. When I just did a find/replace to add the :math: I overlooked this.


.. c:member:: SUNMatrix JacP

Matrix data for the Jacobian :math:`df/dp`.
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Suggested change
Matrix data for the Jacobian :math:`df/dp`.
Matrix data for the Jacobian :math:`\partial f/\partial p`.


.. c:member:: SUNRhsJacFn JacFn

Jacobian function pointer to evaluate :math:`df/dy`.
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Suggested change
Jacobian function pointer to evaluate :math:`df/dy`.
Jacobian function pointer to evaluate :math:`\partial f/\partial y`.

Comment on lines +215 to +219
Sets the function pointers to evaluate :math:`(df/dy)^T v` and :math:`(df/dp)^T v`

:param adj_stepper: The SUNAdjointStepper object.
:param Jvp: function that evaluates :math:`(df/dy)^T v`.
:param JPvp: function that evaluates :math:`(df/dp)^T v`.
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Suggested change
Sets the function pointers to evaluate :math:`(df/dy)^T v` and :math:`(df/dp)^T v`
:param adj_stepper: The SUNAdjointStepper object.
:param Jvp: function that evaluates :math:`(df/dy)^T v`.
:param JPvp: function that evaluates :math:`(df/dp)^T v`.
Sets the function pointers to evaluate :math:`(\partial f/\partial y)^T v` and :math:`(\partial f/\partial p)^T v`
:param adj_stepper: The SUNAdjointStepper object.
:param Jvp: function that evaluates :math:`(\partial f/\partial y)^T v`.
:param JPvp: function that evaluates :math:`(\partial f/\partial p)^T v`.

Comment on lines +227 to +231
Sets the function pointers to evaluate :math:`v^T (df/dy)` and :math:`v^T (df/dp)`

:param adj_stepper: The SUNAdjointStepper object.
:param Jvp: function that evaluates :math:`v^T (df/dy)`.
:param JPvp: function that evaluates :math:`v^T (df/dp)`.
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Suggested change
Sets the function pointers to evaluate :math:`v^T (df/dy)` and :math:`v^T (df/dp)`
:param adj_stepper: The SUNAdjointStepper object.
:param Jvp: function that evaluates :math:`v^T (df/dy)`.
:param JPvp: function that evaluates :math:`v^T (df/dp)`.
Sets the function pointers to evaluate :math:`v^T (\partial f/\partial y)` and :math:`v^T (\partial f/\partial p)`
:param adj_stepper: The SUNAdjointStepper object.
:param Jvp: function that evaluates :math:`v^T (\partial f/\partial y)`.
:param JPvp: function that evaluates :math:`v^T (\partial f/\partial p)`.

Comment on lines +177 to +180
Performs the matrix-vector product *y \gets A^Tx*. It should
only be called with vectors *x* and *y* that are compatible with
the matrix *A^T* -- both in storage type and dimensions. The return
value denotes the success/failure of the operation:
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Should these use :math: mode?

Suggested change
Performs the matrix-vector product *y \gets A^Tx*. It should
only be called with vectors *x* and *y* that are compatible with
the matrix *A^T* -- both in storage type and dimensions. The return
value denotes the success/failure of the operation:
Performs the matrix-vector product :math:`y \gets A^Tx`. It should
only be called with vectors :math:`x` and :math:`y` that are compatible with
the matrix :math:`A^T` -- both in storage type and dimensions. The return
value denotes the success/failure of the operation:

Comment on lines +51 to +56
# "ark_test_erkadjoint.cpp\;--check-freq 1 --no-stages\;"
# "ark_test_erkadjoint.cpp\;--check-freq 2 --no-stages\;"
# "ark_test_erkadjoint.cpp\;--check-freq 5 --no-stages\;"
# "ark_test_erkadjoint.cpp\;--check-freq 1 --dont-keep --no-stages\;"
# "ark_test_erkadjoint.cpp\;--check-freq 2 --dont-keep --no-stages\;"
# "ark_test_erkadjoint.cpp\;--check-freq 5 --dont-keep --no-stages\;"
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Should these just be deleted from the file instead of commented out?

Suggested change
# "ark_test_erkadjoint.cpp\;--check-freq 1 --no-stages\;"
# "ark_test_erkadjoint.cpp\;--check-freq 2 --no-stages\;"
# "ark_test_erkadjoint.cpp\;--check-freq 5 --no-stages\;"
# "ark_test_erkadjoint.cpp\;--check-freq 1 --dont-keep --no-stages\;"
# "ark_test_erkadjoint.cpp\;--check-freq 2 --dont-keep --no-stages\;"
# "ark_test_erkadjoint.cpp\;--check-freq 5 --dont-keep --no-stages\;"

Comment on lines +514 to +521
// TODO(CJB): figure out why ForwardDiff, CVODES, and ERK adjoint all differ
// if (check_sensitivities_backward(sf))
// {
// fprintf(stderr,
// ">>> FAILURE: adjoint solution does not match correct answer\n");
// return -1;
// };
// printf(">>> PASS\n");
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Is this "TODO(CJB)" still relevant, or should the comment and associated code be deleted?

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4 participants