![]() Simon was a key contributor to the design of the now-standard functional language Haskell, and is the lead designer of the widely-used Glasgow Haskell Compiler (GHC). Simon Peyton Jones, MA, MBCS, CEng, graduated from Trinity College Cambridge in 1980. Since the very first Haskell eXchange in 2012, we've been lucky to have Simon join us each year to share his unique perspective on everything from front end features to join points, Linear Types, and pattern matching - not to mention last year's very special announcement of the Haskell Foundation.Ĭheck out all of Simon's previous Haskell eXchange talks here. We are honoured to welcome back Simon Peyton Jones to the Haskell eXchange. At the end of the road we’ll find the Kmett/Pearlmuttter/Siskind ‘ad’ library in Hackage… but I hope we’ll see it with new eyes. In this talk I’ll explain what AD is, and how we can do it for higher order programs, using a series of simple steps that take us a simple-and-obviously-correct version to a weird-but-very-efficient one. But reverse-mode AD (the important kind) is a bit mind bending, and becomes much more so if you want reverse-mode AD for higher order programs (i.e. Lightning Talk "A Spectre is Haunting Haskell - The Spectre of Effects"Īutomatic differentiation is all the rage these days, largely because it is a key enabler for machine learning. On "Haskell in the Enterprise: A Report from in the Belly of the Whale" On "An Overview of GHC's Constraint Solver" On "A Curious Case of a Memory that Just Didn't Go Away Quickly" ![]() On "Generating fast and expressive code using LLVM and Haskell" On "A Conceptual Introduction to Nix for Haskellers" On "Designing and Verifying Programs with Formal Specification" On "Streamly: Haskell Programmer’s Swiss Army Knife" On "Avoiding Quadratic Blow-up During Compilation" On "Scaling Application State Beyond Memory: A Functional Approach" On "Why and how the external STG interpreter is useful" On "How We Migrated 65K Lines of Javascript Code to Haskell: Good, Bad and Ugly" On "Multi-dimensional Arrays that Do Not Exist" Keynote "Haskell: What To Do When Success Can't Be Avoided" Keynote "Provably correct, asymptotically efficient, higher-order reverse-mode automatic differentiation
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