UNIVERSITY OF HERTFORDSHIRE COMPUTER SCIENCE RESEARCH COLLOQUIUM presents "The Chain Rule of Differentiation is Associative - So What?" Prof. Ewe Naumann (Aachen University, Germany) 5 October 2022 (Wednesday) 13:00 -14:00 Everyone is Welcome to Attend D118 Abstract: ... well, feasibility of backpropagation for training artificial neural networks by some variant of stochastic gradient descent is one rather obvious consequence. Adjoint algorithmic differentiation (AD) of numerical simulation programs enabling large-scale error control, uncertainty quantification or nonlinear optimization turns out to be the more general concept. Resulting challenges are discussed briefly. ... in fact, several combinatorial optimization problems arise when aiming to design a near-optimal AD algorithm for a given differentiable program. We discuss the main challenges and ideas behind AD mission planning. Short Bio: Uwe Naumann has been a professor for Computer Science at RWTH Aachen University, Aachen, Germany, since 2004. He holds a Ph.D. in Applied Mathematics from the Technical University Dresden, Germany. Post-doctoral appointments in France, in the UK and in the US include a position as a Senior Lecturer at the University of Hertfordshire from 2000-2002. Uwe's research and software development is largely inspired by algorithmic differentiation including applications in various areas of computational science, engineering and finance. His 100+ peer reviewed publications include the popular textbook "The Art of Differentiating Computer Programs. An Introduction to Algorithmic Differentiation" published by SIAM in 2012. Uwe has been serving as the program director of the SIAM Activity Group on Applied and Computational Discrete Algorithms (ACDA) since 2020. Only recently he was appointed as Principal Scientist of the Numerical Algorithms Group (NAG) Ltd., Oxford, UK. --------------------------------------------------- Hertfordshire Computer Science Research Colloquium http://cs-colloq.cs.herts.ac.uk