Search Results for author: Oliver Sheridan-Methven

Found 3 papers, 3 papers with code

Rounding error using low precision approximate random variables

1 code implementation17 Dec 2020 Oliver Sheridan-Methven, Michael Giles

For numerical approximations to stochastic differential equations using the Euler-Maruyama scheme, we propose incorporating approximate random variables computed using low precisions, such as single and half precision.

Numerical Analysis Numerical Analysis 65G50, 65C10, 41A10, 65C05, 65Y20, 60H35, 65B10, 65L70, 34M30, 97N20, 65C30

Approximating inverse cumulative distribution functions to produce approximate random variables

2 code implementations17 Dec 2020 Oliver Sheridan-Methven, Michael Giles

For random variables produced through the inverse transform method, approximate random variables are introduced, which are produced by approximations to a distribution's inverse cumulative distribution function.

Numerical Analysis Numerical Analysis 65C10, 41A10, 65D15, 65C05, 62E17, 65Y20, 60H35, 65C30

Escaping local minima with derivative-free methods: a numerical investigation

1 code implementation29 Dec 2018 Coralia Cartis, Lindon Roberts, Oliver Sheridan-Methven

We apply a state-of-the-art, local derivative-free solver, Py-BOBYQA, to global optimization problems, and propose an algorithmic improvement that is beneficial in this context.

Optimization and Control

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