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Mar
25
asked borel measurable functions and measurable functions
Feb
7
asked boundary of the support of a continuous function
Nov
7
asked minimize p norm of f+c
Sep
21
asked determinant in terms of quadratic form evaluated at a point
Aug
30
asked Does symmetric decreasing rearrangement of a smooth function preserves smoothness?
Aug
7
answered How to prove: “Every subspace of $V$ invariant under $T$ is also invariant under $T^*$ if and only if $T$ is normal.”?
Jun
10
asked surface area of the graph of a convex function
May
10
asked Min-Max Principle and Harnack's inequality
May
3
asked Upper semi-continuity of log-concave functions
Apr
17
asked reducibility of an operator
Apr
6
asked proof on Poincare's inequality.
Apr
3
asked Minimizing sequence that has certain property
Mar
29
asked Limiting argument when proving inequality in Sobolev space
Mar
21
asked What does it mean for a distribution to be in $L_2$?
Feb
10
asked What is the characteristics for the wave equation with space dimension more than 1?
Oct
12
asked how to prove this function is harmonic (Fritz John 4.1 #5)
Apr
7
asked Approximating measurable function by continuous ones
Feb
9
asked Approximate continuous mapping by smooth mappings on manifold(Bott, Tu book)
Nov
14
asked Confused at the definition for integration of differential form over manifold
Nov
12
asked How to prove this formula for Lie derivative for differential forms