Open Games: the Long Road to Practical Applications

In the third talk of the ACT@UCR seminar, Jules Hedges spoke about open games!

He gave his talk on Wednesday April 15th. Afterwards we discussed it at the Category Theory Community Server, here:

You can view or join the conversation there if you sign in.

You can see his slides here, or download a video here, or watch the video here:

• April 15, Jules Hedges: Open games: the long road to practical applications.

Abstract. I will talk about open games, and the closely related concepts of lenses/optics and open learners. My goal is to report on the successes and failures of an ongoing effort to try to realise the often-claimed benefits of categories and compositionality in actual practice. I will introduce what little theory is needed along the way. Here are some things I plan to talk about:

— Lenses as an abstraction of the chain rule

— Comb diagrams

— Surprising applications of open games: Bayesian inference, value function iteration

— The state of tool support

— Open games in their natural habitat: microeconomics

— Sociological aspects of working with economics

6 Responses to Open Games: the Long Road to Practical Applications

  1. Would it be possible to ask for a copy of the slides with the handout option? It’s super-annoying to have a massive pdf with line-by-line reveal on each new page.

  2. John Baez says:

    Ask Jules on Twitter if you want. I’m doing enough work already for this seminar.

    • John Baez says:

      Okay, the new version of the slides is up now, at the same place.

    • Blake Stacey says:

      That’s a really good point that I haven’t paid attention to when sharing my slides. I will have to take that extra step in the future. Thanks!

      Also, I’d like to leave a note of general appreciation for John and everyone else involved in making these seminars happen. I’ve dropped in twice now even though the topics have been at most adjacent to anything I officially work on. Partly, this was to keep my intellectual curiosity going, and partly it was to see how online seminars can work in practice as the community gets the bugs out of the process, since I hope to run one of my own not too long from now. They have been helpful on both counts.

      • John Baez says:

        Speaking for everyone—thanks! I’ve been too busy running online seminars to go to many, but the great thing about having them recorded on YouTube is that they are available whenever one has time (though the live experience is nicer, since you can ask questions or at least dream of doing so).

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