Visiting speaker: Luis R. Izquierdo

Place: Room 621, GP South (Building 78)

Time: Thursday 11th May, 10:30 morning Tea, 11:00am seminar

Title: Is your model susceptible to floating-point errors?

Speaker: Luis R. Izquierdo

Floating-point arithmetic is a subject all too often ignored; yet, for computational models of complex systems in particular, it has the potential to create misleading results, and even to influence emergent outcomes of the model.

In this seminar I will highlight the features of computational models that make them especially vulnerable to floating-point errors. I will also suggest ways in which the impact of such errors can be mitigated. My intention is to focus on small floating-point errors because these are most likely to occur, whilst still potentially having a major influence on the outcome of the model. The significance of small floating-point errors in computer models can often be reduced by applying a range of different techniques to different parts of the code. In the seminar I will briefly compare a number of techniques that can be used to address these errors.

Luis R. Izquierdo
Agent Based Simulation Modeller
The Macaulay Institute
Aberdeen AB15 8QH
Tel: +(44) (0) 1224 498200 Ext 2230
Fax: +(44) (0) 1224 311556

(Biographical details at

Dr. Ariel Liebman
Research Fellow
ARC Centre for Complex Systems
School of ITEE, University of Queensland
tel: +61-7-3365-1623
mobile: +61-(0)414-226-336
room: 78-414, GP South, St Lucia Campus

World-class basic and applied inter-disciplinary research on questions fundamental to understanding, designing and managing complex systems
2009 The ARC Centre for Complex Systems, Australia