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Code Issues 10 Pull Requests 1 Actions Projects Releases 2 Wiki Activity
103 Commits 11 Branches 2 Tags 1.5 MiB
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Author SHA1 Message Date
Aaron Fenyes
1ce609836b Implement frozen variables 2024-07-15 22:11:54 -07:00
Aaron Fenyes
b185fd4b83 Switch to backtracking Newton's method in Optim 
This performs much better than the trust region Newton's method for the
actual `circles-in-triangle` problem. (The trust region method performs
better for the simplified problem produced by the conversion bug.)
 2024-07-15 15:52:38 -07:00
Aaron Fenyes
94e0d321d5 Switch back to BigFloat precision in examples 2024-07-15 14:31:30 -07:00
Aaron Fenyes
53d8c38047 Preserve explicit zeros in Gram matrix conversion 
In previous commits, the `circles-in-triangle` example converged much
more slowly in BigFloat precision than in Float64 precision. This
turned out to be a sign of a bug in the Float64 computation: converting
the Gram matrix using `Float64.()` dropped the explicit zeros, removing
many constraints and making the problem much easier to solve. This
commit corrects the Gram matrix conversion. The Float64 search now
solves the same problem as the BigFloat search, with comparable
performance.
 2024-07-15 14:08:57 -07:00
Aaron Fenyes
7b3efbc385 Clean up backtracking gradient descent code 
Drop experimental singularity handling strategies. Reduce the default
tolerance to within 64-bit floating point precision. Report success.
 2024-07-15 13:15:15 -07:00
Aaron Fenyes
25b09ebf92 Sketch backtracking Newton's method 
This code is a mess, but I'm committing it to record a working state
before I start trying to clean up.
 2024-07-15 11:32:04 -07:00
Aaron Fenyes
3910b9f740 Use Newton's method for polishing 2024-07-11 13:43:52 -07:00
Aaron Fenyes
d538cbf716 Correct improvement threshold by using unit step 
Our formula for the improvement theshold works when the step size is
an absolute distance. However, in commit `4d5ea06`, the step size was
measured relative to the current gradient instead. This commit scales
the base step to unit length, so now the step size really is an absolute
distance.
 2024-07-10 23:31:44 -07:00
Aaron Fenyes
4d5ea062a3 Record gradient and last line search in history 2024-07-09 15:00:13 -07:00
Aaron Fenyes
5652719642 Require triangle sides to be planar 2024-07-09 14:10:23 -07:00
Aaron Fenyes
f84d475580 Visualize neighborhoods of global minima 2024-07-09 14:01:30 -07:00
Aaron Fenyes
77bc124170 Change loss function to match gradient 2024-07-09 14:00:24 -07:00
Aaron Fenyes
023759a267 Start "circles in triangle" from a very close guess 2024-07-08 14:21:10 -07:00
Aaron Fenyes
610fc451f0 Track slope in gradient descent history 2024-07-08 14:19:25 -07:00
Aaron Fenyes
93dd05c317 Add required package to "sphere in tetrahedron" example 2024-07-08 14:19:05 -07:00
Aaron Fenyes
9efa99e8be Test gradient descent for circles in triangle 2024-07-08 12:56:28 -07:00
Aaron Fenyes
828498b3de Add sphere and plane utilities to engine 2024-07-08 12:56:14 -07:00
Aaron Fenyes
736ac50b07 Test gradient descent for sphere in tetrahedron 2024-07-07 17:58:55 -07:00
Aaron Fenyes
ea354b6c2b Randomize guess in gradient descent test 
Randomly perturb the pre-solved part of the guess, and randomly choose
the unsolved part.
 2024-07-07 17:56:12 -07:00
Aaron Fenyes
d39244d308 Host Ganja.js locally 2024-07-06 21:35:09 -07:00
Aaron Fenyes
7e94fef19e Improve random vector generator 2024-07-06 21:32:43 -07:00
Aaron Fenyes
abc53b4705 Sketch random vector generator 
This needs to be rewritten: it can fail at generating spacelike vectors.
 2024-07-02 17:16:31 -07:00
Aaron Fenyes
17fefff61e Name gradient descent test more specifically 2024-07-02 17:16:19 -07:00
Aaron Fenyes
133519cacb Encapsulate gradient descent code 
The completed gram matrix from this commit matches the one from commit
e7dde58 to six decimal places.
 2024-07-02 15:02:59 -07:00
Aaron Fenyes
e7dde5800c Do gradient descent entirely in BigFloat 
The previos version accidentally returned steps in Float64.
 2024-07-02 12:35:12 -07:00
Aaron Fenyes
242d630cc6 Get Ganja.js to display planes 2024-06-27 21:49:53 -07:00
Aaron Fenyes
8eb1ebb8d2 Merge branch 'ganja' into gram 2024-06-26 15:57:07 -07:00
Aaron Fenyes
05a824834d Let visibility controls scroll 2024-06-26 15:56:51 -07:00
Aaron Fenyes
a113f33635 Merge branch 'ganja' into gram 
Get visibility controls.
 2024-06-26 15:52:20 -07:00
Aaron Fenyes
5ea32ac53c Streamline visibility controls 2024-06-26 15:51:57 -07:00
Aaron Fenyes
3eb4fc6c91 Add element visibility controls 2024-06-26 15:24:31 -07:00
Aaron Fenyes
7aaf134a36 Size the viewer window automatically 2024-06-26 13:15:54 -07:00
Aaron Fenyes
c933e07312 Switch to Ganja.js basis ordering 2024-06-26 11:39:34 -07:00
Aaron Fenyes
2b6c4f4720 Avoid naming conflict with identity transformation 2024-06-26 11:28:47 -07:00
Aaron Fenyes
5aadfecf6c Merge branch 'ganja' into gram 
Visualize low-rank factorization results.
 2024-06-26 11:12:24 -07:00
Aaron Fenyes
4a28a47520 Update namespace of AbstractAlgebra.Rationals 2024-06-26 01:06:27 -07:00
Aaron Fenyes
a3b1f4920c Build construction viewer module 2024-06-26 00:41:21 -07:00
Aaron Fenyes
665cb30ce0 Correct indentation of CSS 2024-06-25 23:31:00 -07:00
Aaron Fenyes
182b5bb9f6 Generate palette automatically 2024-06-25 17:57:16 -07:00
Aaron Fenyes
b7b5b9386b Load elements from Julia into Ganja.js 2024-06-25 16:30:19 -07:00
Aaron Fenyes
06a9dda5bb Play with reflections 
Try configuration of five tangent spheres.
 2024-06-25 13:40:40 -07:00
Aaron Fenyes
69a9baa8ee Add live updates to Ganja.js visualization 2024-06-25 03:11:50 -07:00
Aaron Fenyes
3b10c95d5f Clean up examples 
Declare JavaScript variables. Revise Julia comments to match new code.
 2024-06-25 02:58:39 -07:00
Aaron Fenyes
3c34481519 Get familiar with Ganja.js inline syntax 2024-06-25 01:54:01 -07:00
Aaron Fenyes
d1ce91d2aa Get a Ganja.js visualization running in Blink 2024-06-24 19:37:57 -07:00
Aaron Fenyes
58a5c38e62 Try numerical low-rank factorization 
The best technique I've found so far is the homemade gradient descent
routine in `descent-test.jl`.
 2024-05-30 00:36:03 -07:00
Aaron Fenyes
ef33b8ee10 Correct signature 2024-03-01 13:26:20 -05:00
Aaron Fenyes
717e5a6200 Extend Gram matrix automatically 
The signature of the Minkowski form on the subspace spanned by the Gram
matrix should tell us what the big Gram matrix has to look like
 2024-02-21 03:00:06 -05:00
Aaron Fenyes
16826cf07c Try out the Gram matrix approach 2024-02-20 22:35:24 -05:00
Aaron Fenyes
3170a933e4 Clean up example of three mutually tangent spheres 2024-02-15 17:16:37 -08:00