Christian Alexander @CFindlater

Mathematics, Physics, Engineering, Scientific Computing Joined March 2021

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Christian Alexander @CFindlater

a week ago

I am genuinely in love with the Americans discovering Scottish people and culture - like hands-down one of the funniest things to happen.

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Christian Alexander @CFindlater

2 weeks ago

@cmiller__ @notch @XorDev No problem and my pleasure - hope it is of use to you!

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Christian Alexander @CFindlater

2 weeks ago

Since @notch asked, I have provided a computed example. May be of interest to @XorDev and @cmiller__ also.

notch @notch

2 weeks ago

@CFindlater @XorDev @cmiller__ Am I correct in assuming that the main reason there's no three dimensional equivalent is that while you certainly can define such a structure, it doesn't form a group, so you don't get a bunch of useful structure that is analogous to other groups? I don't know group theory well

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Christian Alexander @CFindlater

2 weeks ago

@notch @XorDev @cmiller__ On determinants: the Lie algebra (infinitesimal action of the group) is anti-commutative by definition via the [X, Y]= - [Y, X] relation, which is precisely the structure one is already working with. For example, the group SL(2, \mathbb{R}) is all 2 \times 2 matrices w/ det = 1.

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Christian Alexander @CFindlater

2 weeks ago

@notch @XorDev @cmiller__ Another way: groups are essentially a vector space \mathbb{R} without axiom of commutativity - this give rise to the anti-commutative algebras which are forms of the geometric algebra one sees in representations of algebras within graphics programming contexts.

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Christian Alexander @CFindlater

2 weeks ago

@XorDev @cmiller__ @notch Quaternions have strong connections to Lie theory and have seen some interesting work on computational geometry and symmetry groups in this context - this may be of interest to you.

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Christian Alexander @CFindlater

2 weeks ago

@notch Yes!

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Chris Grocott @DrChrisGrocott

a month ago

Academic Twitter is having a meltdown because some people have just learned that you should actually read the sources you cite. This really shouldn't be as controversial as it appears to be.

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Christian Alexander @CFindlater

2 months ago

Yup my University is indeed on this list. Literal nightmare.

vx-underground @vxunderground

2 months ago

Here is the list of every school district, college, and university impacted by the ShinyHunter's Canvas compromise. It is nearly indeed over 9,000 schools because it includes entire school districts. Here is a list of every place currently impacted: privatebin.net/?f8c17bc224cd9…

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Christian Alexander @CFindlater

2 months ago

I was also revising for an exam tomorrow so I guess I just go fuck myself then?

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Christian Alexander @CFindlater

2 months ago

I can confirm at my university Canvas is down, or, 'undergoing maintenance'.

vx-underground @vxunderground

2 months ago

ShinyHunters compromised Canvas (to a currently unknown extent) which resulted in a "this system has been compromised" to over 9,000 universities. As ridiculous as that sounds, I'm not memeing. It has been speculated it is actually over 9,000 universities. ShinyHunters is

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sudoSanti @SantiTobio_

8 months ago

The word "manifold" should be banned for at least 2-3 years in the AI and especially neuroscience communities, with the option to publicly execute those who use it and don't know what a homeomorphism is. I would start to call it the "m-word""

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Christian Alexander @CFindlater

7 months ago

@XorDev I genuinely love your work Xor

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Christian Alexander @CFindlater

9 months ago

@aswren Thank you for standing up for GenZ Adam! 🫡

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Christian Alexander @CFindlater

10 months ago

@XorDev Incredible!

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Christian Alexander @CFindlater

10 months ago

@RussellWolfey @IAmTimNguyen Yeah I think I began reading this about the same time you did - shocking to see the outcomes of how science, popularity, and social media collide.

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Christian Alexander @CFindlater

a year ago

SEO has destroyed the Internet.

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Christian Alexander @CFindlater

a year ago

@sebs_tweets @obsdmd Yeah have found that it can incentivise this. I really like that it works with Markdown. Can make notes pretty much anywhere and import them as it needed.