Community Digest

Top new questions this week:

What's a Heine reference for the "Andréief-Heine identity"

The "Andréief identity" or "Andréief-Heine identity", which can be interpreted as a continuous analogue of the Cauchy-Binet formula, comes up a lot in the context of random matrix ...

mathematics reference-request  
user avatar asked by kimchi lover Score of 5
user avatar answered by Georg Essl Score of 6

Boole's use of supplementary classes

Boole could have represented "$x$ is a subclass of $y$" via the formula $x=xy$ (where $xy$ signifies the intersection of the class $x$ and the class $y$), but according to Daniel Bonevac and ...

logic logicians  
user avatar asked by James Propp Score of 3
user avatar answered by Mauro ALLEGRANZA Score of 2

Why did Vandermonde become interested in algebraic problems?

I recently became interested in a person named Vandermonde when I posted a question on this site about the history of determinants and read the answers and comments. He was a person who loved music ...

mathematicians biographical-details linear-algebra  
user avatar asked by user1274233 Score of 3

A Comprehensive Masterpiece on History of Science

I am looking for books that are very technical on History of Science as a whole. It should be encyclopedia-typed, and written by prominent historians. It should also include philosophy of science type ...

reference-request  
user avatar asked by Yinuo An Score of 2
user avatar answered by BakerStreet Score of 6

Historically, when were the terrestrial planets first called terrestrial planets?

I asked this on the Astronomy Stack Exchange, but it's probably better suited here—When did we start using the phrase "terrestrial planets" to refer to the inner planets in English ...

terminology astronomy  
user avatar asked by oaklight37 Score of 1
user avatar answered by njuffa Score of 2

Greatest hits from previous weeks:

What scientists and mathematicians were afraid to publish their findings?

Background I am interested in scientists and mathematicians that were afraid to publish their findings during their lifetime, and to what degree such fears hinder scientific progress. So far, I've ...

biographical-details big-list  
user avatar asked by Max Muller Score of 24
user avatar answered by Mikhail Katz Score of 24

What are the earliest inventions to store and release energy (e.g. fly wheels)?

I am interested in very early inventions that allowed energy to be stored and released after a delay even it's just a short time. With "invention" I mean a novelty that is the result of ...

physics discoveries energy ancient  
user avatar asked by Jan Score of 13
user avatar answered by Alexandre Eremenko Score of 30

Did Alan Turing know the German language?

In the film "The Imitation Game" Alan Turing, while being interviewed at Bletchley Park, confesses that he doesn't speak German, which almost makes him fail the interview. I think I read ...

language computer-scientists turing  
user avatar asked by bereal Score of 26
user avatar answered by Daniel S Score of 35

Why is kg the standard unit for mass and not g in SI?

Why is $\mathrm{kg}$ the standard unit for mass and not $\mathrm{g}$? I know that there is the kilogramme des Archives which is a kilogram and not a gram. But originally on April 7, 1795 the gram was ...

physics units  
user avatar asked by wythagoras Score of 25
user avatar answered by David Hammen Score of 12

Why was Évariste Galois killed?

It is well known that Évariste Galois died a young man. I have heard that he died in a duel. What was the duel about? More rather what is the back story behind his death and did he really write down ...

mathematicians biographical-details 19th-century galois  
user avatar asked by Ali Caglayan Score of 75
user avatar answered by Manjil P. Saikia Score of 11

History of the inverse matrix

I know the definition and the procedure to calculate the inverse of a matrix, but I want to know the history of starting the idea of an inverse matrix. mathematicians must have faced a real life ...

mathematics linear-algebra  
user avatar asked by user 31466 Score of 9

Did geometric patterns in nature suggest the early notions of proportion and ratios?

I'm very interested to learn about historical phenomenology of proportion and ratios, i.e. I want to know how and why people in the past introduced these concepts. As far as I understand symmetric ...

mathematics ancient-greece ancient-egypt  
user avatar asked by Shahed al mamun Score of 9
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