Abstract
This paper presents a class of Petrov-Galerkin finite element (PGFE) methods for the initial-value problem for nonlinear Volterra integro-differential equations: y′(t) = f(t, y(t)) + ∫0t k(t, s, y(s))ds, t ∈ I := [0, T], y(0) = 0. These methods have global optimal convergence rates, and have certain global and local super-convergence features. Several post-processing techniques are proposed to obtain globally super-convergent approximations. As by products, these super-convergent approximations can be used as efficient a-posteriori error estimators. Numerical examples are provided to illustrate properties of these methods.
Original language | English |
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Pages (from-to) | 405-426 |
Number of pages | 22 |
Journal | Dynamics of Continuous, Discrete and Impulsive Systems Series B: Application and Algorithm |
Volume | 8 |
Issue number | 3 |
Publication status | Published - 1 Sept 2001 |
Externally published | Yes |
Keywords
- A-posteriori error estimators
- Interpolation post-processing
- Optimal error estimates
- Petrov-Galerkin finite element methods
- Volterra integro-differential equations
ASJC Scopus subject areas
- Discrete Mathematics and Combinatorics
- Applied Mathematics