M,n,k game Updated 2025-07-16
Order of a differential equation Updated 2025-07-16
Order of the highest derivative that appears.
Biconvex spherical lens Updated 2025-07-16
Each side is a sphere section. They don't have to have the same radius, they are still simple to understand with different radiuses.
The two things you have to have in mind that this does are:
Bicycle tire sizes Updated 2025-07-16
Yes, Sheldon he has separate American and British English versions of pages!!!
For example, Kross bicycle (2017) had a Schwalbe tyre with markings:
42-622 (28 x 1.60, 700x40C)
When inflated, the tires were about 3.5cm wide as measured with a ruler.
And the Mavic A319 rim had markings:
622x19C
In this:
Chain rule Updated 2025-07-16
Here's an example of the chain rule. Suppose we want to calculate:
So we have:
and so:
Therefore the final result is:
Taxonomic rank Updated 2025-07-16
Naming taxonomic ranks like genus, domain, etc. is a fucking waste of time, only useful before we developed molecular biology.
All that matters is the tree of clades with examples of species in each clade, and common characteristics shared by the clade.
And with molecular biology, we can build those trees incredibly well for extant species. When extinct species are involved however, things get more complicated.
Bilinear map Updated 2025-07-16
Linear map of two variables.
More formally, given 3 vector spaces X, Y, Z over a single field, a bilinear map is a function from:
that is linear on the first two arguments from X and Y, i.e.:
Note that the definition only makes sense if all three vector spaces are over the same field, because linearity can mix up each of them.
The most important example by far is the dot product from , which is more specifically also a symmetric bilinear form.
Bill Gates Updated 2025-07-16
The enemy?
It does not matter how many trillions you donate to charity, Bill. If you want to prove your point, make MS Word free and open source and port it to Linux. And then Window implements POSIX-compatible APIs and then deprecate non-POSIX APIs.
Video 1.
Bill Gates Jumps Over Chair
. Source.
Bill Haydon Updated 2025-07-16
Figure 1.
Bill Haydon played by Ian Richardson in the 1979 Tinker Tailor Soldier Spy (TV series)
Figure 2.
Bill Haydon played by Colin Firth in the 2011 Tinker Tailor Soldier Spy (film)
Bill Nye Updated 2025-07-16
Maybe we need these people, maybe we do.
The problem as with many well known science communicators is that he falls too much on the basic side of the the missing link between basic and advanced.
Video 1.
Bill Nye isn't really a Scientist (& why that shouldn't matter) by BobbyBroccoli (2017)
Source. Bobby's personal overview of Bill's carrier.
Binet (École Polytechnique) Updated 2025-07-16
TODO is there a publicly visible list?
Function by signature Updated 2025-07-16
In this section we classify some functions by the type of inputs and outputs they take and produce.
Oxford physics course handbook Updated 2025-07-16
The normal navigation to them was paywalled, but the static files are served without login checks if you know their URL. One way to go about it is to search by prefix on the Wayback Machine: web.archive.org/web/*/https://www2.physics.ox.ac.uk/sites/default/files/contentblock/2011/06/03/*
The last handbooks we can find are 2020/2021, they might have move to a new more properly paywalled location after that year.

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