Galaxy in the Virgo cluster Updated +Created
Some major ones:noirlab.edu/public/images/noao-m49/?nocache=true also lists: M58, M59, M60, M61, M84, M85, M86, M87, M88, M89, M90, M91, M98, M99, and M100 so lots of large and easily observable galaxies in the area.
Galaxy in the Local Group Updated +Created
Genome Updated +Created
Germline Updated +Created
It is quite mind blowing when you think about it, that the huge majority of your body's cells is essentially just there to support a tiny ammount of germline, which are the only cells that can actually pass on! It is fun to imagine the cell type tree for this, with a huge branching of somatic cells, and only a few germline going forward.
Landau quantization Updated +Created
Associative array Updated +Created
More commonly known as a map or dictionary.
The orthogonal group is the group of all matrices that preserve the dot product Updated +Created
When viewed as matrices, it is the group of all matrices that preserve the dot product, i.e.:
This implies that it also preserves important geometric notions such as norm (intuitively: distance between two points) and angles.
This is perhaps the best "default definition".
Developmental neurobiology Updated +Created
This is hot shit, a possible worst case but sure to get there scenario to understand the brain!
Huygens-Fresnel principle Updated +Created
Gene expression profiling Updated +Created
Generator of a Lie algebra Updated +Created
Park Tool PW-5 (2022) Updated +Created
Deep learning framework Updated +Created
Note that:
and for that to be true for all possible and then we must have:
i.e. the matrix inverse is equal to the transpose.
Conversely, if:
is true, then
These matricese are called the orthogonal matrices.
TODO is there any more intuitive way to think about this?
Pre-order depth-first search Updated +Created
This is the order in which you would want to transverse to read the chapters of a book.
Like breadth-first search, this also has the property of visiting parents before any children.
Post-order depth-first search Updated +Created
Has the property of visiting all descendants before the parent.
Astronomy Updated +Created
Ciro Santilli likes to learn astronomy a bit like he learns geography: go down some lists of "stuff that seems most relevant in some criteria to us!", possibly at different size scales e.g.:
GNU screen Updated +Created
Most important things to know:
  • kill window: Ctrl + A K
Google 2FA app token can be updated without checking the old 2FA Updated +Created
Ermm, as of February 2021, I was able to update my 2FA app token with the password alone, it did not ask for the old 2FA.
So what's the fucking point of 2FA then? An attacker with my password would be able to login by doing that!
Is it that Google trusts that particular action because I used the same phone/known IP or something like that?

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