3,026 reputation
31138
bio website cs.elte.hu/~batka
location Budapest
age 43
visits member for 4 years, 1 month
seen 3 hours ago
I work in functional analysis, my research areas are evolution equations, operator semigroups and delay differential equations.

4h
reviewed Close how can i calculate the 2x2x2 (doublet tensorproduct)
4h
reviewed Leave Open Existence of a projection operator onto subspace of Hilbert space
1d
reviewed Reviewed Find $U \in H^1(\Omega \times (0,\infty))$ such that $\nabla E(u-\bar u)\nabla U \geq 0?$ (PDE harmonic extension)
1d
reviewed Close Laplace equation in polar coordinates
1d
reviewed Close Reformulation of a theorem for special case
Mar
29
reviewed Close What is the most efficient algorithmic implementation of maximum overlap discrete wavelet transform?
Mar
29
reviewed Close Are numbers fundamental mathematical entities?
Mar
24
reviewed Close Clarification on notation of “left invariant fields” (Lie groups)
Mar
24
reviewed Close Which way for reading the proofs?
Mar
23
reviewed Close On ranks of matrix products
Mar
23
reviewed Close A hypergeometric identity
Mar
23
reviewed Close Solving a tough a PDE shifting data
Mar
23
reviewed Close Theorems about matrices with entries from $0,1,-1$?
Mar
21
reviewed Leave Closed Is there a natural bijection from $\mathbb{N}$ to $\mathbb{Q}$?
Mar
21
reviewed Leave Open Obtain any 3-manifold from repeating surgeries on knots in $S^3$
Mar
21
reviewed Approve When does the sequence of iterates of a rational function converge?
Mar
21
reviewed Approve Finding monochromatic rectangles in a countable coloring of $R^{2}$
Mar
21
comment Can you help me find a fractal drawing program?
Try to ask this at math.stackexchange.com, this here is probably not the right place for your question.
Mar
20
comment Da Prato's notion of Symmetric Operator
Would you ask for more specific places? Cite a place where you cannot decide?
Mar
11
reviewed Reviewed Completion of a vector space inside a given Banach space