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Mathematics
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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

1,436
answers
14
questions
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  • Lyon, France
  • Member for 3 years
  • 6,479 profile views
  • Last seen 10 mins ago

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Top Posts (1,450) All Questions Answers | Votes Newest

75 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
17 How can I find all solutions to differential equation? Aug 10 '16
13 Proving a jigsaw is possible Jun 12 '17
12 Looking for references about a tessellation of a regular polygon by rhombuses. Feb 3 '17
12 $a,b,c,d\ne 0$ are roots (of $x$) to the equation $ x^4 + ax^3 + bx^2 + cx + d = 0 $ May 1 '16
12 If $f(\frac{x+y}{2})=\frac{f(x)+f(y)}{2}$, then find $f(2)$ May 25 '16
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