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Summary

This PR adds comprehensive docstrings to key LinearSolve.jl types and functions that were previously undocumented or had minimal documentation. The additions significantly improve the developer and user experience by providing detailed explanations of core components.

Major Documentation Additions

Core Infrastructure:

  • LinearCache: Complete documentation of the core cache structure with field descriptions and usage examples
  • Abstract type hierarchy: Comprehensive docs for all abstract types (SciMLLinearSolveAlgorithm, AbstractFactorization, etc.)
  • Trait functions: Detailed documentation for needs_concrete_A, default_tol, aliasing functions

Algorithm Types:

  • LinearSolveFunction & DirectLdiv!: Complete solve function documentation
  • RFLUFactorization: Enhanced docs with parameter explanations and performance notes
  • FastLUFactorization & FastQRFactorization: Detailed FastLapack interface documentation
  • SimpleLUFactorization & LUSolver: Comprehensive pure Julia implementation docs

Preconditioners:

  • ComposePreconditioner: Documentation for preconditioner composition
  • InvPreconditioner: Complete inverse preconditioner documentation

Algorithm Selection:

  • defaultalg: Comprehensive documentation of the core algorithm selection logic with examples

Documentation Quality Features

  • Consistent formatting following Julia documentation standards
  • Detailed parameter descriptions for all constructors
  • Performance notes and use case guidance
  • Cross-references between related types
  • Practical examples for complex interfaces
  • Mathematical interpretations where relevant

Testing

  • All code loads successfully with new documentation
  • Documentation follows Julia docstring conventions
  • No breaking changes to existing APIs

Test plan

  • Verify LinearSolve.jl loads without errors
  • Check docstring formatting is correct
  • Ensure no regression in existing functionality
  • Validate examples in documentation compile correctly

🤖 Generated with Claude Code

ChrisRackauckas and others added 3 commits August 14, 2025 13:23
- Document LinearCache struct with detailed field descriptions
- Add docstrings for utility functions: init_cacheval, default_tol, default_alias_*
- Document preconditioner types: ComposePreconditioner, InvPreconditioner
- Add comprehensive docs for LinearSolveFunction and DirectLdiv! solve functions
- Improve RFLUFactorization docs with parameter and performance details
- Enhance FastLUFactorization and FastQRFactorization documentation
- Document SimpleLUFactorization and LUSolver with usage examples

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>
- Document complete abstract type hierarchy with detailed explanations
- Add comprehensive docstring for defaultalg function with algorithm selection logic
- Document needs_concrete_A trait function with usage examples
- Provide detailed characteristics and use cases for each abstract type
- Include cross-references between related algorithm types

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>
…tion

- Create new Internal API documentation page with complete docstring coverage
  * Document abstract type hierarchy with detailed explanations
  * Add LinearCache and caching system documentation
  * Include trait functions and utility function docs
  * Cover solve functions and preconditioner infrastructure

- Add Algorithm Selection Guide for users
  * Explain automatic algorithm selection logic with examples
  * Provide performance guidance for different matrix types
  * Include decision flowchart and manual override examples
  * Cover dense, sparse, GPU, and iterative method selection

- Enhance existing solver documentation
  * Add DirectLdiv! and LinearSolveFunction to solver list
  * Update documentation navigation structure

- Update documentation navigation
  * Add internal_api.md to Advanced section
  * Add algorithm_selection.md to Basics section

This significantly improves both user and developer documentation by making
the package's architecture and algorithm selection transparent and accessible.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>
@ChrisRackauckas ChrisRackauckas merged commit a6b6926 into SciML:main Aug 14, 2025
115 of 118 checks passed
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2 participants