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Mathematics
Meta user
Network profile
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Jean Marie

Semi-retired professor (Lyon, France). Having more free time now, I devote it to sharing knowledge, especially in mathematics and its links with computer science.

Some of my answers that can be of interest:

In analysis:

https://math.stackexchange.com/q/2265961

https://math.stackexchange.com/q/1693990

https://math.stackexchange.com/q/2114726

In linear algebra:

https://math.stackexchange.com/q/1788168

https://math.stackexchange.com/q/1917093

In abstract algebra:

https://math.stackexchange.com/q/2297857

https://math.stackexchange.com/q/2248671

In probability:

https://math.stackexchange.com/q/1979286

1,610
answers
16
questions
~428k
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  • Lyon, France
  • Member for 3 years, 4 months
  • 7,349 profile views
  • Last seen 1 hour ago

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Top posts (1,626) All Questions Answers | Votes Newest

76 Why does Friedberg say that the role of the determinant is less central than in former times? Nov 4 '16
23 Is it possible to have a $3 \times 3$ matrix that is both orthogonal and skew-symmetric? Jan 17 '17
21 Three bullets are shot in a sphere. What is the probabilty that all of them end up in the same hemisphere? Jun 6 '16
19 Japanese theorem, in its extended form Jan 20 '18
18 Find the determinant of $I + A$ Oct 16 '16
16 Find all functions $f$ such that $f(x)+f(\frac{1}{1-x})=x$ May 4 '17
16 How can I find all solutions to differential equation? Aug 10 '16
13 What is the probability of $\cos(\theta_1) + \cos(\theta_2) + \cos(\theta_1 - \theta_2) + 1 \le 0$? Oct 21 '16
13 Proving a jigsaw is possible Jun 12 '17
12 Ill-known/original/interesting investigations on/applications of inversion (the geometric transform) Jan 29 '18
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