Deterministic game Updated +Created
Direct current source Updated +Created
Discrete Updated +Created
Something that is very not continuous.
Notably studied in discrete mathematics.
Occam's razor Updated +Created
Absorbing Markov chain Updated +Created
CC BY-NC-SA Updated +Created
Too restrictive. People should be able to make money from stuff.
The definition of "commercial" could also be taken in extremely broad senses, making serious reuse risky in many applications.
Notably, many university courses use it, notably MIT OpenCourseWare. Ciro wonders if it is because academics are wary of industry, or if they want to make money from it themselves. This reminds Ciro of a documentary he watched about the origins of one an early web browsers in some American university. And then that university wanted to retain copyright to make money from it. But the PhDs made a separate company nonetheless. And someone from the company rightly said something along the lines of:
The goal of universities is to help create companies and to give back to society like that. Not to try and make money from inventions.
TODO source.
The GNU project does not like it either www.gnu.org/licenses/license-list.en.html#CC-BY-NC:
This license does not qualify as free, because there are restrictions on charging money for copies. Thus, we recommend you do not use this license for documentation.
In addition, it has a drawback for any sort of work: when a modified version has many authors, in practice getting permission for commercial use from all of them would become infeasible.
en.wikipedia.org/wiki/Creative_Commons_NonCommercial_license#Defining_%22Noncommercial%22 also talks about the obvious confusion this generates: nobody can agree what counts as commercial or not!
In September 2009 Creative Commons published a report titled, "Defining 'Noncommercial'". The report featured survey data, analysis, and expert opinions on what "noncommercial" means, how it applied to contemporary media, and how people who share media interpret the term. The report found that in some aspects there was public agreement on the meaning of "noncommercial", but for other aspects, there is wide variation in expectation of what the term means.
Discrimination Updated +Created
Distributed computing Updated +Created
Distributed social network Updated +Created
SQL aggregate function Updated +Created
Change of basis matrix Updated +Created
The change of basis matrix is the matrix that allows us to express the new basis in an old basis:
Mnemonic is as follows: consider we have an initial basis . Now, we define the new basis in terms of the old basis, e.g.:
which can be written in matrix form as:
and so if we set:
we have:
The usual question then is: given a vector in the new basis, how do we represent it in the old basis?
The answer is that we simply have to calculate the matrix inverse of :
That is the matrix inverse.
Drama film Updated +Created
Numeric function Updated +Created
This section is about functions that operate on numbers such as the integers or real numbers.
Octahedron Updated +Created
Octonion Updated +Created
Unlike the quaternions, it is non-associative.
Oracle Database Updated +Created
Often known simply as SQL Server, a terrible thing that makes it impossible to find portable SQL answers on Google! You just have to Google by specific SQL implementation unfortunately to find anything about the open source ones.
Chevalley group Updated +Created
Chico Buarque Updated +Created
Within the The Holy Trinity of popular Brazilian music, Chico tends to approach the more down to Earth and heavy topics.
Chinese food Updated +Created
Chinese traditional painting Updated +Created
Unclear legality:

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