Fast approximate inversion of a block triangular Toeplitz matrix with applications to fractional sub-diffusion equations.
Xin LuHong-Kui PangHai-Wei SunPublished in: Numer. Linear Algebra Appl. (2015)
Keyphrases
- diffusion equation
- systems of linear equations
- coefficient matrix
- anisotropic diffusion
- scale space
- diffusion process
- partial differential equations
- least squares
- pattern formation
- noise removal
- finite difference
- image enhancement
- multiscale
- scale spaces
- positive definite
- filtering method
- lie group
- boundary conditions