Reputation
1,730
Top tag
Next privilege 2,000 Rep.
Edit questions and answers
Badges
10 19
Impact
~47k people reached

  • 0 posts edited
  • 0 helpful flags
  • 44 votes cast
Feb
18
accepted Question on Evans' treatment of elliptic 2n order equations
Feb
18
accepted Different definitions for Lebesgue points
Feb
18
asked Question on Evans' treatment of elliptic 2n order equations
Feb
17
comment Combining Two 3D Rotations
depending on what on context of the problem, you might compute the eigenspace of eigenvalue 1 (i.e. the rotation axis whose vectors are fixed under that rotation).
Feb
17
accepted Mathematical precise definition of a PDE being elliptic, parabolic or hyperbolic
Feb
11
asked Mathematical precise definition of a PDE being elliptic, parabolic or hyperbolic
Jan
31
asked Intuition for Calderon-Zygmund operator?
Jan
24
revised Completeness of BMO without duality to $H^1$
formatting
Jan
24
accepted Completeness of BMO without duality to $H^1$
Jan
24
asked Completeness of BMO without duality to $H^1$
Jan
19
revised Different definitions for Lebesgue points
typo + clarification
Jan
19
comment Different definitions for Lebesgue points
Well, both definitions exist (cf. "Lebesgue Differentiation theorem" and "Lebesgue point" in Wikipedia). But it would set me somehow aghast if the difference between both definitions would really be swept under the rug.
Jan
19
asked Different definitions for Lebesgue points
Jan
16
comment How to define the derivative of Radon measures
Of course, the for all quantifier in that case is to be regarded as "for all $r$ sufficiently small$. As the measure is positive, there is either a $\mu$-negligible ball or not.
Jan
14
comment How to define the derivative of Radon measures
$\bar{B_r(x)}$ denotes just the closure \bar{B_r(x)}. Corrected, didn't know how to do until now.
Jan
14
revised How to define the derivative of Radon measures
corrected tex
Jan
14
comment How to define the derivative of Radon measures
Compare the Frechet-derivative or Gateaux-derivative. Of course, the question of convergence of the difference quotient is more subtle in the infinite-dimensional case.
Jan
14
revised How to define the derivative of Radon measures
added 16 characters in body
Jan
14
awarded  Critic
Jan
14
comment Arbitrary non-integer power of a matrix
Does the square root of a matrix defined with this approach coincide with the canoical square root $\sqrt(A^\ast A )$?