Reputation
Top tag
Next privilege 250 Rep.
View close votes
Badges
6
Newest
 Teacher
Impact
~2k people reached

  • 0 posts edited
  • 0 helpful flags
  • 17 votes cast
Apr
8
accepted Integrating $\frac{1}{(x^2+b)^{3/2}}$?
Apr
8
comment Integrating $\frac{1}{(x^2+b)^{3/2}}$?
Do you have a better idea in mind ?
Apr
8
asked Integrating $\frac{1}{(x^2+b)^{3/2}}$?
Apr
8
asked How to integrate $I = \int_{-a/2}^{a/2}\frac{1}{\sqrt{x^2 + b}}dx$
Apr
6
comment Does gaussian elimination always work?
So if I Gauss a matrix A to a triangular matrix T, I might end up with different eigenvalues than those of A ? But why does it work for determinants then ?
Apr
6
asked Does gaussian elimination always work?
Mar
6
accepted Geometric interpretation of a matrix
Mar
6
comment Geometric interpretation of a matrix
Ok if I understood correctly, the rotation doesn't change the area of a geometric figure so the determinant must be 1 and the inverse transformation is a rotation of angle $-\theta$
Mar
6
asked Geometric interpretation of a matrix
Nov
30
accepted Factorize matrix determinant
Nov
30
asked Factorize matrix determinant
Nov
29
asked Product of Fourier transform
Nov
21
accepted Sign problem, Laplace transform of sin(at)
Nov
21
asked Sign problem, Laplace transform of sin(at)
Oct
30
awarded  Teacher
Oct
30
answered Standard deviation…
Oct
30
comment Standard deviation…
Well that's weird... "x = [-1,0,1]; stdev(x)" yields 1 on Scilab, standard deviation fonction on my phone also says 1, and Wolfram|Alpha too : wolframalpha.com/input/?i=standard+deviation+{-1%2C0%2C1}
Oct
30
asked Standard deviation…
Oct
26
awarded  Curious
Oct
25
accepted Is this rigorous notation?