Mathematics
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d. zeffiro
  • Member for 8 years, 5 months
  • Last seen more than a month ago
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All Questions Answers
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question
8
Limit points of the differential system $\dot {x}=y-x+x^3$, $\dot{y}=-x$
Jan 30, 2015
question
6
Is every compact subset contained in a regular subset?
May 26, 2017
question
3
DeRahm relative cohomology and number of critical points
Dec 31, 2016
question
2
$x^2-\log x = u $ asymptotic behaviour
Dec 11, 2013
answer
2
Example of two closed continuous functions whose "product" is not closed
Dec 27, 2014
question
2
Is the set of solution of $x_0^2+x_1^2-x_2^2=0$ homeomorphic to the set of solution of $x_0^2-x_1^2=0$ in $\mathbb{P}^2(\mathbb{R})$?
Jan 14, 2015
question
2
Measurable set invariant by rotation is radial
Apr 18, 2017
question
1
$S^{n-1}$ is not a deformation retract of $\mathbb{P}^n(\mathbb{R})/ B(0,1)$.
Sep 8, 2014
question
1
Example of two closed continuous functions whose "product" is not closed
Dec 27, 2014
question
1
Is a Borel finite measure on $\mathbb{R}^2$ bounded by "width" absolutely continuous?
Apr 17, 2017
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What are the best places online where math educators can discuss their experience?

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