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نمایش تعداد 1-10 از 35
The topological fundamental groups and their properties
We discuss some properties of topological fundamental groups....
ON THE REGULAR COVERING OF A GRAPH
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 ...
On topological fundamental groups of quotient spaces
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 quotient topology...
On Weakly (Noncommutatively) Slender Groups
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 ...
VAN-KAMPEN TYPE THEOREM FOR TOPOLOGICAL FUNDAMENTAL GROUPS
In this talk we present a Van-Kampen type theorem for topological
fundamental groups. As a consequence we show that the topological
fundamental group of a union space of open subspaces with simply connected...
THE TOPOLOGICAL FUNDAMENTAL GROUPS AND THEIR PROPERTIES
In this talk, we put a topology on the fundamental group of certain spaces....
Influence of the fundamental group on local homeomorphisms
In this talk, after reviewing the concept of local homeomorphisms, covering maps and fundamental
groups, first we mention a result on uniqueness of lifting for local homeomorphism. Second, we
prove some of ...
On the generalized covering of a graph
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.
Topological complexity and fundamental group
In this talk, we study the relation between topological complexity and the structure of fundamental groups of spaces. The topological complexity denoted by TC is the number of rules needed for robotic motions in any space X....
On Semicovering Maps
In this talk, after reviewing the concept of covering and semicovering maps, first we give a
modified definition for semicovering maps which seems simpler than the original one given by
J. Brazas. Second we ...