Fnft kdvv inverse#84

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fnft_kdvv_inverse

Commits on Jan 13, 2026

fnft_kdvv_inverse: added skeleton files
Sander Wahls
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Commits on Jan 26, 2026

first working version with early stage of crum transformation feature. One test case is hard implemented yet.

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Refactoring, Fix scaling problem due to missing sqrt in mod_mex_fnft_kdvv_inverse_example_1.m

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Refactoring-

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Commits on Feb 2, 2026

Refactoring add_one_solition.

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Refactoring of add_one_solition() and fnft_kdvv_inverse() finished so far. Ready for implementing add_two_solitons().

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Implementing add_two_solitons. Works, but differences to matlab, similar to problem with add_one_solition.

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small refactorings

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Remove mod_mex_fnft_kdvv_inverse_example_1.m from project

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Commits on Feb 9, 2026

Fixing scaling problem in fnft_kdvv_inverse

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Fixing error at initializing C_E in add_one_solition

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fixing errors in add_two_solitions

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Commits on Feb 10, 2026

Refactoring, defining auxiliary functions

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Commits on Feb 16, 2026

Adding first test for inverse kdvv fnft

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Adding conditions in fnft_kdvv_inverse_test_1

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Commits on Feb 17, 2026

Change in fnft__misc.c from printf to fnft_errwarn_getprinf() for output in matlab

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Rename in fnft_kdvv_inverse.c x_grid to t_grid, t1 to temp_t1, t2 to temp_t2

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Adapt Credentials fnft_kdvv_inverse.c

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Add in find_first_positive_value condition if positive value was found

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Commits on Feb 23, 2026

Add in fnft_kdvv_inverse_test_1.c function run_test and swap major procedure from main into it. Same style then fnft_kdvv_test_accounting_99sech.c

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Add misc_hausdorff_dist_normed based on misc_hausdorff_dist

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Add test conditions in fnft_kdvv_inverse_test_1 and test for quadratic convergence now

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Commits on Mar 2, 2026

Add struct fnft_kdvv_params and implement it into functions in fnft_kdvv_inverse_test_1

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Refactoring: Move test prcedure fnft__kdvv_inverse_testcases_get_spectrum_of_inverse, which calculates the spectrum of the inverse of some bound states to ffnft_kdvv_inverse_testcases.c, so that it…

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Add fnft_kdvv_inverse_example.c

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fnft__misc.c: Fix Indexing Error in misc_hausdorff_dist_normed

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fnft__kdvv_inverse_testcases: Improve Debugging Messages

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fnft_kdvv_inverse_test_1.c: Now allocate for contspec of kdvv_parameters an empty array

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Add fnft_kdvv_inverse_test_2.c (Test with 25 Eigenvalues)

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Commits on Mar 16, 2026

Change error bounds ind fnft_kdvv_inverse_test_1.c

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Changing number of Eigenvalues in fnft_kdvv_inverse_test_2 and error bounds

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Add short test description

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Rename print_test_results into kdvv_print_spectrum and make it a public function.

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Add fnft_kdvv_inverse_test_3.c for test with assymetric window

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Changing error bounds in fnft_kdvv_inverse_test_3.c

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Changing parameters in fnft_kdvv_inverse_example.c

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Change Parameters in mex_fnft_kdvv_inverse_example_1.m

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Refactoring fnft_kdvv_inverse_test_3.c

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Commits on Mar 27, 2026

Changing variable names in fnft_kdvv_inverse_example.c

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Commits on Mar 31, 2026

Add an initial version of an analytic test case

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Commits on Apr 7, 2026

Minor refactoring in analytic test case

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Add comments and plots to mex_fnft_kdvv_inverse_example_1.m

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Add mex_fnft_kdvv_inverse_example_2.m as illustration for the relation between inverse and forward kdvv

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Add mex_fnft_kdvv_inverse_example_3.m as a fast way to try different eigenvalues and normconsts

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Add mex_fnft_kdvv_inverse_example_4.m as a very simple example

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Minor refactoring in mex_fnft_kdvv_inverse_example_1.m

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Refactoring examples for inverse kdvv because of consistency in the order of provided bound states to add

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Improving comment in mex_fnft_kdvv_inverse_example_1.m

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Add fnft_kdvv_inverse_example_1.c as a simple example for the usage of inverse kdvv in C

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Change fnft_kdvv_inverse_example.c to fnft_kdvv_inverse_example_2.c. This is an example for the usage of the inverse_kdvv with many eigenvalues. Adding explanatory comments.

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Adapting bound states and windows for correct scaling

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Adding checks for invalid inputs in fnft_kdvv_inverse.c

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Commits on Apr 10, 2026

Commits on Apr 16, 2026

Commits on Apr 17, 2026

Define error tolerances as constants and adapt window position in analytic test case

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Commits on Apr 20, 2026

Commits on Apr 30, 2026

Commits on Jun 15, 2026