Abstract
In this paper, a family of compensated stochastic theta methods (CSTM), as opposed to stochastic theta methods (STM) are proposed after the introduction of a compensated Poisson process. These methods are justified to have a strong convergence order of 1/2. Further we investigate mean-square stability of the proposed methods. For a linear test equation, we show that an extension of the deterministic A-stability property holds for CSTM, if and only if 1 / 2 ⩽ θ ⩽ 1 . For a general nonlinear problem, of which the drift term f has a negative one-sided Lipschitz constant and the diffusion terms g , h satisfy global Lipschitz condition, we find that backward Euler method (STM with θ = 1 ) preserves stability under a stepsize constraint, while compensated backward Euler method (CSTM with θ = 1 ) gives a generalization of the deterministic B-stability. Those stability results indicate that CSTM achieve superiority over STM in terms of stability.
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