In this talk, we discuss on the covering and immersion

of graphs. Based on some properties, we establish some results

about relation between immersion and covering. In particular, we

give some condition ...

In this talk, we discuss on the top ological prop erties of a

quotient of top ological fundamental groups via a new sub-groups of fundamental group, namely small generated sub-group, constructed by small lo ops which ...

In this talk, we discuss on the covering and immersion of graph. Based on some properties, we generalize the concept of covering graph and establish some results about relation between immersion and generalized covering.

In this paper we compute the topological complexity of configuration space of some robots with obstacle by using the methods of algebraic topology.

Monotonic optimization is one of specially structured nonconvex problems that is frequently used in

application. Many nonconvex optimization problems in engineering could be directly converted to a

monotonic ...

Let $p:X\\rightarrow X/A$ be a quotient map, where $A$ is a subspace of $X$. We explore conditions under which $p_*(\\pi_1^{qtop}(X,x_0))$ is dense in $\\pi_1^{qtop}(X/A,*))$, where the fundamental groups enjoy the natural ...

This paper is devoted to study some topological properties of the SG subgroup, πsg1 (X, x), of the quasitopological fundamental group of a based space (X, x), πqtop1 (X, x), its topological properties as a subgroup of the ...

In this paper, by reviewing the concept of semicovering maps, we present some conditions under which a local homeomorphism becomes a semicovering map. We also obtain some conditions under which a local homeomorphism is a ...

The class of slender groups is closed under direct sums, but it is not closed under
direct product. Also, the class of noncommutatively slender groups is closed under
weak direct products, but i t i s not closed under ...