v0.16.0

TensorKit v0.16.0

Diff since v0.15.3

Release notes:

We are pleased to announce TensorKit.jl v0.16.0! This release expands multifusion support, makes accessing diagonal data easier, streamlines tensor printing, and refreshes our TensorOperations backend while tightening documentation and error messaging.

🎉 Highlights

• Multifusion utilities: unitspace, zerospace, leftunitspace, rightunitspace, isunitspace (#291)
• Projections and orthogonal complements across tensors (#312)
• rrule for transpose to improve AD coverage (#319)
• TensorOperations backend/allocator rework for clearer extensibility (#311)
• First part of a major docs overhaul plus symmetric tensor tutorial (#289, #316)
• Changes to tensor showing/printing methods, with (part of) tensor block data being shown (#322)
• SectorVector <: AbstractVector as output type for singular and eigenvalues (#324)

✨ New Features

• Multifusion spaces now expose unitspace, zerospace, leftunitspace, rightunitspace, isunitspace to reason about units and zero objects (#291)
• Projections and orthogonal complements for tensors (#312)
• ChainRules rrule for transpose (#319)

🔧 Improvements

• left_orth, right_orth, left_null, right_null, ishermitian, and isisometric aligned with MatrixAlgebraKit v0.6 interfaces (#312)
• svd_vals, eig_vals and eigh_vals now output a "vector" instead of a diagonal tensor. (#325)
• TensorOperations reworked around backend and allocator abstractions for cleaner extensibility (#311)
• Clearer error messages across the codebase (#309)
• Changes to tensor showing/printing methods, with (part of) tensor block data being shown (#322)

🐛 Fixes

• Avoid unnecessary copy in twist for bosonic braiding tensors (#305)
• Miscellaneous fixes and typos (#295)

📦 Dependencies

• MatrixAlgebraKit v0.6-compatible interfaces for factorization helpers
• TensorOperations backend and allocator better integrated

📚 Documentation

• Broad documentation refresh with improved navigation (#289)
• Added symmetric tensor tutorial in the appendix (#316)

🙏 Acknowledgments

Thanks to everyone who contributed PRs, issues, and feedback for this release.

🔗 Links

• Full changelog
• Stable docs
• Development docs

Merged pull requests:

• WIP: Documentation update/overhaul (#289) (@Jutho)
• Generalising functions to support GenericUnit (#291) (@borisdevos)
• Avoid copy in twist for tensors with bosonic braiding (#305) (@leburgel)
• Error message improvements (#309) (@lkdvos)
• remove'\n' in compact printing of tensors (#310) (@lkdvos)
• rework TensorOperations implementation to use backend and allocator (#311) (@lkdvos)
• Updates for MatrixAlgebraKit v0.6 (#312) (@lkdvos)
• Add symmetric tensor tutorial to docs as appendix (#316) (@leburgel)
• Bump actions/checkout from 5 to 6 (#318) (@dependabot[bot])
• Add rrule for transpose (#319) (@lkdvos)
• Bump v0.16 + Remove old deprecations (#321) (@lkdvos)
• further tweak tensor and block show (#322) (@Jutho)
• Update changelog [skip ci] (#323) (@Jutho)
• Add SectorVector (#324) (@lkdvos)

Closed issues:

• right_null errors when trunc is provided (#313)
• truncation error with rtol (#314)