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Uniform tensor trains #22

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Uniform tensor trains #22

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stecrotti
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@stecrotti stecrotti commented Dec 1, 2023

This adds a UniformTensorTrain and InfiniteUniformTensorTrain type, which are tensor trains of the form
$f(x_1,\ldots,x_L) = \text{Tr}\left[A(x_1)\cdots A(x_L)\right]$.
Since this is still experimental, I'm not yet exporting these types and relative methods have been put in a separate submodule UniformTensorTrains which can be imported with using TensorTrains.UniformTensorTrains.

The type hierarchy is re-organized by introducing an AbstractPeriodicTensorTrain encompassing all periodic tensor trains.

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codecov bot commented Dec 1, 2023

Codecov Report

Attention: Patch coverage is 96.98492% with 6 lines in your changes missing coverage. Please review.

Project coverage is 96.47%. Comparing base (480232d) to head (a3b92ae).

Files Patch % Lines
src/UniformTensorTrains/transfer_operator.jl 93.33% 3 Missing ⚠️
src/UniformTensorTrains/uniform_tensor_train.jl 98.56% 2 Missing ⚠️
src/svd_trunc.jl 0.00% 1 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##             main      #22      +/-   ##
==========================================
+ Coverage   96.08%   96.47%   +0.39%     
==========================================
  Files           6        9       +3     
  Lines         383      568     +185     
==========================================
+ Hits          368      548     +180     
- Misses         15       20       +5     

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@stecrotti
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To do: dot product of two uniform tensor trains

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