User Guide

This guide explains cudass concepts and shows how to use it with many examples. Start with Overview, then Quick Start, and continue through the sections as needed.

• Overview
  • What is cudass?
  • When to use cudass
  • Matrix format: COO
  • Matrix types
  • Backends
  • Right-hand side and solution
• Quick Start
  • The example
  • What each part does
  • Running it
  • Reusing the factorization
  • Next steps
• Basic Usage
  • Example: SPD (symmetric positive definite)
  • Example: General square
  • Example: Symmetric (non-singular)
  • Example: Multiple right-hand sides
  • Example: Building COO from a dense matrix
  • Next
• Rectangular and Singular Systems
  • Overdetermined systems (least-squares)
  • Underdetermined systems (min-norm)
  • Square singular (min-norm)
  • Rectangular and rank-deficient
  • Summary of matrix types for rectangular/singular
  • Next
• Advanced Options
  • Prefer cuSOLVER Dense (prefer_dense)
  • Forcing a specific backend (force_backend)
  • Factorization cache (use_cache)
  • Float32 vs float64
  • Structure change vs value-only update
  • Device
  • Inspecting the backend
  • Complete example: all options