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Donald Knuth’s Christmas Lecture (2022) [video] (youtube.com)
155 points by yllan on Dec 25, 2022 | hide | past | favorite | 14 comments



I've never met Professor Knuth, but he taught me a lesson that I treasure.

I suppose these days the best way I can describe it is that his example "de-weaponized" Christianity for me.

It could be said that religion is like a radioactive material; too much of it all together can go boom.

But Prof Knuth's lesson for me was that I didn't have to leave my mind at the door outside when entering a church. I found his book, "Things a Computer Scientist Rarely Talks About", a series of talks that he gave at an MIT Symposium.

And I don't, much. Talk about these things. And there's lots I don't like about church and the role we seem to press upon it.

But compassion and honesty seem to work pretty good. I'm grateful.

https://en.wikipedia.org/wiki/Things_a_Computer_Scientist_Ra...


I attended this in person on Dec 7 (as I have every year it's been held, since 2014). A good text outline of the talk by David Cassel was just posted today, here: https://thenewstack.io/donald-knuths-2022-christmas-tree-lec...


The most nostalgic part of this is that he's doing the presentation with a camera pointing at paper/books setup. Back in the 90's when I was talking CS, professors routinely presented by writing on plastic sheets using an overhead projector.

Not sure what I was expecting from Knuth though - maybe I was imagining some amazing TeX-based live diagramming environment, but then again he doesn't really use email which should have tempered these expectations.


I recently found these videos about number theory

https://youtube.com/playlist?list=PL8yHsr3EFj53L8sMbzIhhXSAO...

And I was surprised both by how effective the method of camera and pen and paper was and by the didactic quality of the lectures


Dr. Knuth often presents using transparencies --- that's how he did his "Earth-shaking announcement":

https://news.ycombinator.com/item?id=1257488


He’s using what’s called an opaque projector—a super useful instrument.


It looks to me like he's using a product by WolfVision that markets itself as a Visualizer[1].

[1](https://wolfvision.com/en/products/vz-8uhd)


Ahh, I guess what I meant to say was that in olden days the optical version of this was called an opaque projector.


Pragmatically, what are good use cases of a twintree data structure?


wow he's still around!


It seems he made it to 70, and then decided to just stop ageing.


People get mad that George RR Martin can't get past his 5th book in a decade.

And here, Knuth has to spend like 40 years writing his 4th book (which has now expanded into 3 books unexpectedly: 4a, 4b and 4c).

/s

I joke of course. But TAOCP's future chapters are some of the most interesting computer challenges available. Every section Knuth writes is another treasure.

It's clear that the computer science field really did take off in the 70s and 80s, so it makes a lot of sense why Volume 4 has expanded so much and scope-creeped.


I wouldn't guess at or disparage Martin's motives, but with Knuth, one suspects that the motives are just what it says in the title: art, and computer science.

Like Orson Wells pitching the vinter, Knuth will "sell no wine before its time". https://youtu.be/PUunRgUkRjQ


Just some light trolling, hopefully no GRRM fans get too mad at me for that :)

But yeah, Knuth's legitimate excuse is that he started writing the encyclopedia in the 1960s, when it was still conceivable that one multivolume work could cover all of the (at the time) small field of Computer Science.

But the 1970s and 1980s explosion made that fully impossible. We're lucky to get the chapters Knuth has written so far.




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