Course: Quantum Many-Body Physics in Condensed Matter by Luis Gregorio Dias (2020) by
Ciro Santilli 37 Updated 2025-05-21 +Created 1970-01-01
Applications:
- hash map which is a O(1) amortized implementation of a map
- creating unbreakable chains of data, e.g. for Git commits or Bitcoin.
- storing passwords on a server in a way that if the password database is stolen, attackers can't reuse them on other websites where the user used the same password: security.blogoverflow.com/2013/09/about-secure-password-hashing/
Born: 1965
Died: 2010+-ish
The japanese name literally means:
- 富士 fushi, from Mount Fuji, which itself has unknown origin
- 通 tong: telecommunications
This section is about the definition of the dot product over , which extends the definition of the dot product over .
Some motivation is discussed at: math.stackexchange.com/questions/2459814/what-is-the-dot-product-of-complex-vectors/4300169#4300169
Just like the usual dot product, this will be a positive definite symmetric bilinear form by definition.
The name does not imply regular by default. For regular ones, you should say "regular polytope".
Besides the understandable Wikipedia definition, Video "Simple Groups - Abstract Algebra by Socratica (2018)" gives an understandable one:
Given a finite group and a simple group , find all groups such that is a normal subgroup of and .
We don't really know how to make up larger groups from smaller simple groups, which would complete the classification of finite groups:
In particular, this is hard because you can't just take the direct product of groups to retrieve the original group: Section "Relationship between the quotient group and direct products".
Ciro Santilli's hardware House 2018-01 Fridge by
Ciro Santilli 37 Updated 2025-05-21 +Created 1970-01-01
Brand according to documents: SMEG.
Most similar models I an find: www.smeguk.com/products/UKC8173N1F and www.smeguk.com/products/UKC81721F, the keyword are "built-in" and "integrated", other very similar ones: www.smeguk.com/refrigerators/built-in
Looks like this: www.youtube.com/watch?v=4c_LBVnU4ec and that's how to unclog the drain.
2020-11-28: defrost. Some small Styrofoam was broken lose from top, noticed small burn or rust marks on top grid nearby.
Ciro Santilli's hardware Toshiba MK1059GSM by
Ciro Santilli 37 Updated 2025-05-21 +Created 1970-01-01
Ciro Santilli's hardware dhb Dorica MTB Shoe (2020-12) by
Ciro Santilli 37 Updated 2025-05-21 +Created 1970-01-01
Bought SM-SH56 cleat to accompany.
When it arrived, it felt a bit too long, around 2cm maybe free space after toe, and when I walk and the front part touches ground, heel comes off a bit, which is annoying. But I was too lazy to give it back and take the risk of a second try, also it felt correctly tight on sides. During first test ride it felt good.
How to take your bicycle on the plane by
Ciro Santilli 37 Updated 2025-05-21 +Created 1970-01-01
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