v0.14.5

TensorKit v0.14.5

Diff since v0.14.4

Merged pull requests:

• Add rank and cond (#220) (@lkdvos)
• Fix QR and LQ pullback for rank 0 blocks (#223) (@lkdvos)
• insertunit and removeunit using Val (#224) (@Jutho)
• Replace c == one(I) with isone(c) (#225) (@lkdvos)

Closed issues:

• MethodError in svd_pullback! (#219)
• @constinferred fails for insertleftunit and insertrightunit of HomSpaces for particular Sectors (#221)
• MethodError in qr_pullback! (#222)

v0.14.4

TensorKit v0.14.4

Diff since v0.14.3

Merged pull requests:

• Add dedicated BlockIterators (#206) (@lkdvos)
• DiagonalTensorMap constructor rrule (#208) (@ebelnikola)
• Fix rrules of TensorOperations with DiagonalTensorMap (#210) (@lkdvos)
• Add DiagonalTensorMap constructors and converters (#212) (@Yue-Zhengyuan)
• Add rrule for matrix exponential (#214) (@lkdvos)
• Nightly tests don't count as failed CI (#215) (@lkdvos)
• Add rrule for twist (#217) (@lkdvos)
• Attempt to use default arch in actions to avoid complaints (#218) (@lkdvos)

Closed issues:

• An AD issue in contractions with diagonal tensors (#209)
• rrule for exponential of TensorMap (#213)
• Autodiff for twist? (#216)

v0.14.3

TensorKit v0.14.3

Diff since v0.14.2

Merged pull requests:

• fixed typo (#199) (@adamnemecek)
• rrule for copy_oftype, permutedcopy_oftype (#202) (@lkdvos)
• Fix leftorth! and rightorth! with empty blocks (#205) (@Jutho)
• add unthunk in rrules of eig! eigh! leftorth! rightorth! (#207) (@tangwei94)

Closed issues:

• repartition unexpected behaviour (#200)
• AD of SVD question (#201)
• a small issue of leftorth! (#204)

v0.14.2

TensorKit v0.14.2

Diff since v0.14.1

Merged pull requests:

• Fix similar (#195) (@Jutho)
• fix ad type stability (#198) (@Jutho)

Closed issues:

• libblas not available on nightly (#65)
• The initial functions TensorMap(zeros) and similar appear to be time-consuming for large tensors. (#147)
• Undefined constructor. (#153)
• similar does not work if storagetype is a PtrArray (#194)
• rrules have type instabilities (#197)

v0.14.1

TensorKit v0.14.1

Diff since v0.14.0

• Fix an issue with fusiontree iterators for symmetries with multiple fusion.

Merged pull requests:

• Fix bug in fusion tree iterator for multiple fusion case (#193) (@Jutho)

Closed issues:

• Fusiontree iterator with multiplicities (#192)

v0.14.0

TensorKit v0.14.0

Diff since v0.13.2

• Various index functionalities have been added: flip can be used to change arrows, insertleftunit, insertrightunit and removeunit will manipulate trivial indices.

Breaking changes

• The DiagonalTensorMap is now the default output type for the diagonal singular and eigenvalue tensors returned by tsvd, eig and related functions
• There is a small change in the truncation of singular values for non-abelian symmetries, where now it is guaranteed that smaller singular values are removed first

Merged pull requests:

• Add and test rrules for real and imag (#183) (@lkdvos)
• Constructor fixes (#185) (@Jutho)
• insertleftunit, insertrightunit and removeunit (#187) (@lkdvos)
• change truncation strategy to always select smallest schmidt coefficient (#188) (@Jutho)
• add 🐬 functionality (#189) (@Jutho)
• use diagonaltensormap (#190) (@Jutho)
• some cleanup for v0.14 (#191) (@Jutho)

Closed issues:

• svdvals and eigvals (#34)
• How to apply gradient of gradient? (#175)
• convert to floating point in matrix factorisations (#181)
• Fail to extract block by specifying sector of each index for (N,0) or (0,N) tensors (#182)
• Why using weighted singular values for the truncation? (#184)
• Partial convert(Array, TensorMap) (#186)

v0.13.2

TensorKit v0.13.2

Diff since v0.13.1

• Add functionality for working with DiagonalTensorMap (currently not yet used)
• Various fixes and improvements

Merged pull requests:

• WIP: implementation of DiagonalTensorMap (#174) (@Jutho)
• CompatHelper: bump compat for VectorInterface to 0.5, (keep existing compat) (#176) (@github-actions[bot])
• Bump codecov/codecov-action from 4 to 5 (#177) (@dependabot[bot])
• Braidingtensor improvements (#179) (@lkdvos)
• Fix converting empty tensors to array (#180) (@lkdvos)

Closed issues:

• convert to Array fails for empty TensorMap (#178)

v0.13.1

TensorKit v0.13.1

Diff since v0.13.0

• small patches and improvements

Merged pull requests:

• Add and test 2-arg complex (#172) (@lkdvos)
• small patch to complex, real and imag (#173) (@Jutho)

Closed issues:

• LoadError: type Nothing has no field _conj (#158)
• Error using a combination of mul!, One() and blocks of length 1 (#171)

v0.13.0

TensorKit v0.13.0

Diff since v0.12.7

Merged pull requests:

• WIP: redesign tensormap structure (#140) (@Jutho)
• PR review changes (#166) (@lkdvos)
• Treetransformer optimizations (#167) (@lkdvos)
• Small fixes (#169) (@Jutho)
• restore randisometry, add tests and deprecations (#170) (@Jutho)

Closed issues:

• Feature request: a more flexible SVD truncation scheme (#164)
• Question: solving linear equations (#165)

v0.12.7

TensorKit v0.12.7

Diff since v0.12.6

Fixes for some AD behavior and for the extension loading change in Julia 1.11.1

Merged pull requests:

• Add sectorscalartype (#146) (@lkdvos)
• AdjointTensorMap can wrap generic tensor types (#148) (@lkdvos)
• Various improvements and fixes (#149) (@lkdvos)
• Excise TensorKitSectors (#151) (@lkdvos)
• fix typo in exp!(::TensorMap) errormessage (#154) (@VictorVanthilt)
• Remove fishy imports from other extension (#160) (@lkdvos)
• scalar and AdjointTensorMap AD rrules (#161) (@lkdvos)

Closed issues:

• Unexpected Behavior with truncerr(η) and p=Inf Truncation Scheme (#150)
• TensorMap constructor is slow when applied to an array (#155)