Peeps by @joshuacooper
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Publication of paper with Hays Whitlatch on uniquely pressable graphs, a problem that started in computational phylogenetics and somehow ended up in the theory of matrices over a finite field, graph theory, and poset theory.
Replying to @NateStipe (0xd5d560b2e9faddd6796ac777963dd59c42babae2)
Have they found Caucher Birkar's medal yet?
Last I heard it's considered lost and they gave him a replacement!
Fields Medalists Announced:
https://www.quantamagazine.org/tag/2018-fields-medal-and-nevanlinna-prize-winners
Replying to @NateStipe (0xd5d560b2e9faddd6796ac777963dd59c42babae2)
#lkie - Does the point at -2 on the spectrum = the left leg of the Rowling hypergraph or can you come up w/ the hypergraph and spin it to present it a certain way?
Very interesting question. We don't know yet why the complex spectrum seems to resemble the hypergraph geometrically. (This has been observed by others.) May be related to spectral graph embedding. Spectral hypergraph theory is a new field, and we have much to learn, yet!
The Deathly Hallows symbol, aka the Rowling hypergraph, makes its mathematical début in our new manuscript https://arxiv.org/pdf/1806.05222.pdf (see page 12)
Replying to @NateStipe (0xd5d560b2e9faddd6796ac777963dd59c42babae2)
@joshuacooper You have just been given .22 cents U.S. Why? Why not. This started as a challenge by @pyroisntfire to spread around $1 he tipped me, which I accepted. #peepfairy #payitforward The tx hash is 0x6e9948692a8c547bf4df0036c6151350375ee3c045ad0cd1c17119ffb0d35e83
Awesome, thanks!
Replying to @CallMeGwei (0x285bc660aa42b8effc6c60357cd4d8ca072be625)
I took a few discrete math courses many moons ago. I'll have to check this out. How much math do we need to remember to enjoy this book of yours?
It's a pretty wide range of topics. If you have some discrete math background, you'll probably get something out of most articles, since Ron's work is famously accessible -- but it's definitely written for the research community, so don't expect to understand everything!
Replying to @NateStipe (0xd5d560b2e9faddd6796ac777963dd59c42babae2)
Congrats. Out of curiosity, what factors go into pricing a book (publisher, initial run, expected margins)? I noticed the cost was $59.99 for the paperback.
I don't really know how CUP determines pricing. Presumably their marketing people take into account potential buyers, production cost, standard price windows, etc.
My new book from Cambridge University Press with selected papers by top researchers celebrating Ron Graham's life work just landed!
Connections in Discrete Mathematics: A Celebration of the Work of Ron Graham
https://www.amazon.com/dp/1107153980/
https://bit.ly/2xyBKPp
Replying to @joshuacooper (0xca490ab2a31c40e003a0a8c063442277df7f8774)
Orthogonally Diagonalizable; It is just normal.
Unitarily
Diagonalizable;
It is just normal.
Orthogonally
Diagonalizable;
It is just normal.