Golestan University

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20112026

most citedOn Instrumental Variables Estimation of Causal Odds Ratios

117 citations

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Showing 2011 · math.ATShow all

3 papers · 2 filters

math.AT2011★ 16 cited

Spanier spaces and covering theory of non-homotopically path Hausdorff spaces

Ali Pakdaman, Hamid Torabi, Behrooz Mashayekhy

H. Fischer et al. (Topology and its Application, 158 (2011) 397-408.) introduced the Spanier group of a based space $(X, x)$ which is denoted by $\psp$. By a Spanier space we mean a…

math.AT2011★ 1 cited

On topological fundamental groups of quotient spaces

Hamid Torabi, Ali Pakdaman, Behrooz Mashayekhy

Let $p : X \to X / A$ be a quotient map, where $A$ is a subspace of $X$ . We explore conditions under which $p_{*} (π_{1}^{q t o p} (X, x_{0}))$ is dense in $π_{1}^{q t o p} (X / A, *))$ , where the f…

math.AT2011★ 19 cited

Topological fundamental groups and small generated coverings

Hamid Torabi, Ali Pakdaman, Behrooz Mashayekhy

This paper is devoted to study some topological properties of the SG subgroup, $π_{1}^{s g} (X, x)$ , of the quasitopological fundamental group of a based space $(X, x)$ , $\pt$, its topol…