Numerical approximation of the spectrum of self-adjoint operators in operator preconditioning.
Tomás GergelitsBjørn Fredrik NielsenZdenek StrakosPublished in: Numer. Algorithms (2022)
Keyphrases
- laplacian operator
- gradient operators
- aggregation operators
- merging operators
- optimal control
- approximation error
- connected operators
- differential operators
- ordered weighted averaging
- numerical methods
- numerical calculation
- sensitivity analysis
- upper approximation
- closed form
- conjugate gradient algorithm
- primal dual
- edge preserving
- conjugate gradient
- iterative methods
- revision operators
- relational operators
- translation invariant
- early vision
- error bounds
- objective function