*Communicating Applied Mathematics in 2021*, Gold Medallist Talk, IMA

Mathematics 2021 Online Series, May 6, 2021. Slides,

*Completing, Thresholding, and Factorizing Symmetric Positive Definite Matrices*

IMA Early Career Mathematiciansâ€™ Spring Conference 2021, March 13, 2021. Slides

*Mathematics of Today’s Floating-Point Arithmetic*

London Mathematical Society Naylor Lecture, November 20, 2020. Slides.

*Rehabilitating Correlations*

A talk originally given to the Leicester Actuarial Science Society and Students Union Mathematical Society, October 21, 2020. Slides.

*The Anatomy of the World’s Fastest Linear Equation Solver*

*Random Orthogonal Matrices in High Performance Computing*

Masked Guest Speaker, Extreme Computing Research Center, King Abdullah University of Science and Technology, 2020. Slides.

*Are Numerical Linear Algebra Algorithms Accurate at Extreme Scale and at Low Precisions?*

E-NLA Online Seminar Series on Numerical Linear Algebra, April 29, 2020. Slides.

*Exploiting Mixed Precision Arithmetic for Fast Solution of Positive Definite Linear Systems*

Distinguished Lecture Series, Department of Computer Science, University of British Columbia, December 5 2019. Slides.

*Exploiting Low Precision Arithmetic in the Solution of Linear Systems*

9th International Congress on Industrial and Applied Mathematics, Valencia, 2019. Slides.

*Probabilistic Versus Worst-Case Rounding Error Analysis*

Advances in Numerical Linear Algebra: Celebrating the Centenary of the Birth of James H. Wilkinson, May 29-30, 2019.

*Tricks and Tips in Numerical Computing*

JuliaCon, London, August 9, 2018.

*The Rise of Multiprecision Computations*

The Statistical and Applied Mathematical Sciences Institute (SAMSI), April 26, 2017.

*Challenges in Multivalued Matrix Functions*

North Carolina State # University, April 25, 2017.

*How and How Not to Compute the Exponential of a Matrix*

NAG Technical Event, September 24, 2010. Video