Cong Van

activity

20152017

collaborators

4 papers

math.NA2017

Numerical results of solving 3D inverse scattering problem with non-over-determined data

C. Van

We consider the 3D inverse scattering problem with non-over-determined scattering data. The data are the scattering amplitude $A (β, α_{0}, k)$ for all $β \in S_{β}^{2}$ , where $S_{β}^{2}$ is…

cs.IT2017

Representation of big data by dimension reduction

A. G. Ramm, C. Van

Suppose the data consist of a set $S$ of points $x_{j}, 1 \leq j \leq J$ , distributed in a bounded domain $D \subset R^{N}$ , where $N$ and $J$ are large numbers. In this paper an algor…

math.GR2016

Bounds on the number of conjugacy classes of the symmetric and alternating groups

Bret Benesh, Cong Tuan Son Van

Let $G$ be a finite group with Sylow subgroups $P_{1}, \dots, P_{n}$ , and let $k (G)$ denote the number of conjugacy classes of $G$ . Pyber asked if $k (G) \leq \prod_{i = 1}^{n} k (P_{i})$ for a…

math.NA2015

Creating materials in which heat propagates along a line: theory and numerical results

Alexander G. Ramm, C. Van

In this paper the theory is developed for creating a material in which the heat is transmitted along a given line. This gives a possibility to transfer information using heat signa…