Saak Gabriyelyan

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All published works

Action	Title	Year	Authors
+	Gelfand–Phillips Type Properties of Locally Convex Spaces	2024	Saak Gabriyelyan
+ PDF Chat	Locally Convex Spaces with Sequential Dunford–Pettis Type Properties	2024	Saak Gabriyelyan
+ PDF Chat	Gelfand--Phillips type properties of locally convex spaces	2024	Saak Gabriyelyan
+	Dunford–Pettis type properties of locally convex spaces	2024	Saak Gabriyelyan
+ PDF Chat	Limited type subsets of locally convex spaces	2024	Saak Gabriyelyan
+ PDF Chat	Dunford--Pettis type properties of locally convex spaces	2024	Saak Gabriyelyan
+ PDF Chat	Pe{\l}czy\'{n}ski's type sets and Pe{\l}czy\'{n}ski's geometrical properties of locally convex spaces	2024	Saak Gabriyelyan
+	Limited type subsets of locally convex spaces	2024	Saak Gabriyelyan
+	A simple Efimov space with sequentially-nice space of probability measures	2023	Тарас Банах Saak Gabriyelyan
+	Normed and Banach groups	2023	Saak Gabriyelyan
+ PDF Chat	A Banach space characterization of (sequentially) Ascoli spaces	2023	Saak Gabriyelyan
+	Local completeness of $$C_{k}(X)$$	2023	Saak Gabriyelyan
+	The b-Gelfand–Phillips property for locally convex spaces	2023	Тарас Банах Saak Gabriyelyan
+ PDF Chat	Compatible group topologies on a locally quasi-convex abelian group and the Mackey group problem	2023	Saak Gabriyelyan
+ PDF Chat	Locally convex spaces with the strong Gelfand–Phillips property	2023	Тарас Банах Saak Gabriyelyan
+ PDF Chat	The Josefson-Nissenzweig property for locally convex spaces	2023	Тарас Банах Saak Gabriyelyan
+	Topological Properties of the Weak and Weak$$^*$$ Topologies of Function Spaces	2023	Saak Gabriyelyan
+	A Banach space characterization of (sequentially) Ascoli spaces	2023	Saak Gabriyelyan
+	Properties of the weak and weak$$^*$$ topologies of function spaces	2022	J. C. Ferrando Saak Gabriyelyan
+ PDF Chat	Banach spaces with the (strong) Gelfand–Phillips property	2022	Тарас Банах Saak Gabriyelyan
+	Compatible group topologies on a locally quasi-convex abelian group and the Mackey group problem	2022	Saak Gabriyelyan
+ PDF Chat	On free locally convex spaces	2022	Тарас Банах Saak Gabriyelyan
+	The Gelfand-Phillips property for locally convex spaces.	2021	Тарас Банах Saak Gabriyelyan
+ PDF Chat	The Gelfand-Phillips property for locally convex spaces	2021	Тарас Банах Saak Gabriyelyan
+	Topological properties of inductive limits of closed towers of metrizable groups	2021	Saak Gabriyelyan
+	Banach spaces with the (strong) Gelfand--Phillips property	2021	Тарас Банах Saak Gabriyelyan
+ PDF Chat	Normed Spaces Which Are Not Mackey Groups	2021	Saak Gabriyelyan
+	Locally convex spaces with the strong Gelfand-Phillips property	2021	Тарас Банах Saak Gabriyelyan
+	Banach spaces with the (strong) Gelfand--Phillips property	2021	Тарас Банах Saak Gabriyelyan
+	The Gelfand-Phillips property for locally convex spaces	2021	Тарас Банах Saak Gabriyelyan
+	A simple Efimov space with sequentially-nice space of probability measures	2021	Тарас Банах Saak Gabriyelyan
+	Ascoli and sequentially Ascoli spaces	2020	Saak Gabriyelyan
+ PDF Chat	Ascoli’s theorem for pseudocompact spaces	2020	Saak Gabriyelyan
+	Topological properties of some function spaces	2020	Saak Gabriyelyan Alexander V. Osipov
+ PDF Chat	On reflexivity and the Ascoli property for free locally convex spaces	2020	Saak Gabriyelyan
+	Topological properties of some function spaces	2020	Saak Gabriyelyan Alexander V. Osipov
+	Ascoli's theorem for pseudocompact spaces	2020	Saak Gabriyelyan
+	Ascoli and sequentially Ascoli spaces	2020	Saak Gabriyelyan
+	Baire category properties of some Baire type function spaces	2020	Тарас Банах Saak Gabriyelyan
+	Ascoli's theorem for pseudocompact spaces	2020	Saak Gabriyelyan
+	Ascoli and sequentially Ascoli spaces	2020	Saak Gabriyelyan
+	The Josefson--Nissenzweig property for locally convex spaces	2020	Тарас Банах Saak Gabriyelyan
+	Topological properties of some function spaces	2020	Saak Gabriyelyan Alexander V. Osipov
+ PDF Chat	Dunford–Pettis type properties and the Grothendieck property for function spaces	2019	Saak Gabriyelyan Jerzy Ka̧kol
+	Bounded sets structure of CpX and quasi‐(DF)‐spaces	2019	J. C. Ferrando Saak Gabriyelyan Jerzy Ka̧kol
+	Locally convex properties of free locally convex spaces	2019	Saak Gabriyelyan
+	Topological properties of spaces of Baire functions	2019	Saak Gabriyelyan
+	Topological properties of spaces of Baire functions	2019	Saak Gabriyelyan
+	A topological group observation on the Banach–Mazur separable quotient problem	2019	Saak Gabriyelyan Sidney A. Morris
+	Locally convex spaces and Schur type properties	2019	Saak Gabriyelyan
+ PDF Chat	Maximally Almost Periodic Groups and Respecting Properties	2019	Saak Gabriyelyan
+	Topological properties of spaces of Baire functions	2019	Saak Gabriyelyan
+	The $\kappa$-Fréchet--Urysohn property for locally convex spaces	2018	Saak Gabriyelyan
+ PDF Chat	The Mackey problem for free abelian topological groups	2018	Saak Gabriyelyan
+	Locally convex properties of free locally convex spaces	2018	Saak Gabriyelyan
+ PDF Chat	Topological properties of strict (LF)-spaces and strong duals of Montel strict (LF)-spaces	2018	Saak Gabriyelyan
+	Dunford--Pettis type properties and the Grothendieck property for function spaces	2018	Saak Gabriyelyan Jerzy Kcakol
+ PDF Chat	The Mackey problem for free locally convex spaces	2018	Saak Gabriyelyan
+	Free locally convex spaces and the Ascoli property	2018	Saak Gabriyelyan
+	On reflexivity and the Ascoli property for free locally convex spaces	2018	Saak Gabriyelyan
+	A description of the topology of free topological vector spaces	2018	Saak Gabriyelyan
+	A topological group observation on the Banach--Mazur separable quotient problem	2018	Saak Gabriyelyan Sidney A. Morris
+	On the Mackey problem for free abelian topological groups	2018	Saak Gabriyelyan
+	On the Mackey problem for free locally convex spaces	2018	Saak Gabriyelyan
+	Locally convex spaces and Schur type properties	2018	Saak Gabriyelyan
+ PDF Chat	Free Subspaces of Free Locally Convex Spaces	2018	Saak Gabriyelyan Sidney A. Morris
+	Positive definite functions and dual pairs of locally convex spaces	2018	Daniel Alpay Saak Gabriyelyan
+	Topological properties of inductive limits of closed towers of mertrizable groups	2018	Saak Gabriyelyan
+	Locally convex properties of free locally convex spaces	2018	Saak Gabriyelyan
+	On reflexivity and the Ascoli property for free locally convex spaces	2018	Saak Gabriyelyan
+	A description of the topology of free topological vector spaces	2018	Saak Gabriyelyan
+	Dunford--Pettis type properties and the Grothendieck property for function spaces	2018	Saak Gabriyelyan Jerzy Kcakol
+	Locally convex spaces and Schur type properties	2018	Saak Gabriyelyan
+	On the Mackey problem for free locally convex spaces	2018	Saak Gabriyelyan
+	A topological group observation on the Banach--Mazur separable quotient problem	2018	Saak Gabriyelyan Sidney A. Morris
+	On the Mackey problem for free abelian topological groups	2018	Saak Gabriyelyan
+	The $κ$-Fréchet--Urysohn property for locally convex spaces	2018	Saak Gabriyelyan
+	Maximally almost periodic groups and respecting properties	2017	Saak Gabriyelyan
+ PDF Chat	A locally quasi-convex abelian group without a Mackey group topology	2017	Saak Gabriyelyan
+	The free locally convex space $L(\mathbf{s})$ over a convergent sequence $\mathbf{s}$ is not a Mackey space	2017	Saak Gabriyelyan
+	Embedding into free topological vector spaces on compact metrizable spaces	2017	Saak Gabriyelyan Sidney A. Morris
+	A locally quasi-convex abelian group without Mackey topology	2017	Saak Gabriyelyan
+	SUBSPACES OF THE FREE TOPOLOGICAL VECTOR SPACE ON THE UNIT INTERVAL	2017	Saak Gabriyelyan Sidney A. Morris
+	Metrizable-like locally convex topologies on C(X)	2017	J. C. Ferrando Saak Gabriyelyan Jerzy Ka̧kol
+	On the Ascoli property for locally convex spaces	2017	Saak Gabriyelyan
+	Free topological vector spaces	2017	Saak Gabriyelyan Sidney A. Morris
+	Topological properties of strict $(LF)$-spaces and strong duals of Montel strict $(LF)$-spaces	2017	Saak Gabriyelyan
+	Fundamental bounded resolutions and quasi-$(DF)$-spaces	2017	J. C. Ferrando Saak Gabriyelyan Jerzy Kcakol
+	The free locally convex space $L(\mathbf{s})$ over a convergent sequence $\mathbf{s}$ is not a Mackey space	2017	Saak Gabriyelyan
+	A locally quasi-convex abelian group without Mackey topology	2017	Saak Gabriyelyan
+	Topological properties of strict $(LF)$-spaces and strong duals of Montel strict $(LF)$-spaces	2017	Saak Gabriyelyan
+	Maximally almost periodic groups and respecting properties	2017	Saak Gabriyelyan
+ PDF Chat	Topological properties of function spaces over ordinals	2016	Saak Gabriyelyan Jan Grebík Jerzy Ka̧kol Lyubomyr Zdomskyy
+ PDF Chat	The $C_p$-stable closure of the class of separable metrizable spaces	2016	Тарас Банах Saak Gabriyelyan
+	ON VARIETIES OF ABELIAN TOPOLOGICAL GROUPS WITH COPRODUCTS	2016	Saak Gabriyelyan Sidney A. Morris
+ PDF Chat	The Ascoli property for function spaces	2016	Saak Gabriyelyan Jan Grebík Jerzy Ka̧kol Lyubomyr Zdomskyy
+	On the Mackey topology for abelian topological groups and locally convex spaces	2016	Saak Gabriyelyan
+	On uniformly discrete subsets in uniform spaces and topological groups	2016	Тарас Банах Saak Gabriyelyan Ігор Протасов
+ PDF Chat	Free locally convex spaces with a small base	2016	Saak Gabriyelyan Jerzy Ka̧kol
+	Topological properties of function spaces over ordinals	2016	Saak Gabriyelyan Jan Grebík Jerzy Ka̧kol Lyubomyr Zdomskyy
+	The Ascoli property for function spaces	2016	Saak Gabriyelyan Jan Grebík Jerzy Ka̧kol Lyubomyr Zdomskyy
+	Topological properties of function spaces C(X,2) over zero-dimensional metric spaces X	2016	Saak Gabriyelyan
+	Topological properties of the group of the null sequences valued in an Abelian topological group	2016	Saak Gabriyelyan
+	Free topological vector spaces	2016	Saak Gabriyelyan Sidney A. Morris
+	Free locally convex spaces with a small base	2016	Saak Gabriyelyan Jerzy Ka̧kol
+	A characterization of barrelledness of C(X)	2016	Saak Gabriyelyan
+	On reflexive abelian groups with a Mackey topology	2016	Saak Gabriyelyan
+ PDF Chat	AN OPEN MAPPING THEOREM	2016	Saak Gabriyelyan Sidney A. Morris
+	On reflexive groups and function spaces with a Mackey group topology	2016	Saak Gabriyelyan
+	On the Ascoli property for locally convex spaces and topological groups	2016	Saak Gabriyelyan
+ PDF Chat	The Ascoli property for function spaces and the weak topology of Banach and Fréchet spaces	2016	Saak Gabriyelyan Jerzy Ka̧kol Grzegorz Plebanek
+	The Ascoli property for function spaces	2016	Saak Gabriyelyan Jan Grebík Jerzy Ka̧kol Lyubomyr Zdomskyy
+	Free locally convex spaces with a small base	2016	Saak Gabriyelyan Jerzy Ka̧kol
+	Topological properties of function spaces over ordinals	2016	Saak Gabriyelyan Jan Grebík Jerzy Ka̧kol Lyubomyr Zdomskyy
+	Free topological vector spaces	2016	Saak Gabriyelyan Sidney A. Morris
+ PDF Chat	On the $$C_k$$ C k -stable closure of the class of (separable) metrizable spaces	2015	Тарас Банах Saak Gabriyelyan
+	Varieties of abelian topological groups with coproducts	2015	Saak Gabriyelyan Arkady Leiderman Sidney A. Morris
+ PDF Chat	Networks for the weak topology of Banach and Fréchet spaces	2015	Saak Gabriyelyan J. Kcakol Wiesław Kubiś Witold Marciszewski
+	On <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi mathvariant="fraktur">P</mml:mi></mml:math>-spaces and related concepts	2015	Saak Gabriyelyan Jerzy Ka̧kol
+ PDF Chat	On T-Characterized Subgroups of Compact Abelian Groups	2015	Saak Gabriyelyan
+	On topological properties of Fréchet locally convex spaces with the weak topology	2015	Saak Gabriyelyan Jerzy Ka̧kol Albert Kubzdela Manuel López‐Pellicer
+	On topological spaces and topological groups with certain local countable networks	2015	Saak Gabriyelyan Jerzy Ka̧kol
+	Topological properties of function spaces $C_k(X,2)$ over zero-dimensional metric spaces $X$	2015	Saak Gabriyelyan
+	On topological properties of the weak topology of a Banach space	2015	Saak Gabriyelyan Jerzy Ka̧kol Lyubomyr Zdomskyy
+	The Ascoli property for function spaces and the weak topology of Banach and Fréchet spaces	2015	Saak Gabriyelyan Jerzy Ka̧kol Grzegorz Plebanek
+	A characterization of barrelledness of $C_p(X)$	2015	Saak Gabriyelyan
+	On topological groups with a small base and metrizability	2015	Saak Gabriyelyan Jerzy Ka̧kol Arkady Leiderman
+	On $T$-characterized subgroups of compact Abelian groups	2015	Saak Gabriyelyan
+ PDF Chat	Minimally almost periodic group topologies on countably infinite Abelian groups	2014	Saak Gabriyelyan
+	On reflexivity of the group of the null sequences valued in an Abelian topological group	2014	Saak Gabriyelyan
+	Bounded subgroups as a von Neumann radical of an Abelian group	2014	Saak Gabriyelyan
+	Metrization conditions for topological vector spaces with Baire type properties	2014	Saak Gabriyelyan Jerzy Ka̧kol
+	The strong Pytkeev property for topological groups and topological vector spaces	2014	Saak Gabriyelyan Jerzy Ka̧kol Arkady Leiderman
+ PDF Chat	Free Locally Convex Spaces and the<i>k</i>-space Property	2014	Saak Gabriyelyan
+	On $\mathfrak{P}$-spaces and related concepts	2014	Saak Gabriyelyan Jerzy Ka̧kol
+	On extensions of bounded subgroups in Abelian groups	2014	Saak Gabriyelyan
+	A characterization of free locally convex spaces over metrizable spaces which have countable tightness	2014	Saak Gabriyelyan
+	On characterized subgroups of Abelian topological groups $X$ and the group of all $X$-valued null sequences	2014	Saak Gabriyelyan
+	On topological spaces and topological groups with certain local countable networks	2014	Saak Gabriyelyan Jerzy Ka̧kol
+	Characterizing sequences for precompact group topologies	2013	Dikran Dikranjan Saak Gabriyelyan V. Tarieladze
+	On characterized subgroups of compact abelian groups	2013	Dikran Dikranjan Saak Gabriyelyan
+	On topological properties of the group of the null sequences valued in an Abelian topological group	2013	Saak Gabriyelyan
+ PDF Chat	On a generalization of Abelian sequential groups	2013	Saak Gabriyelyan
+	On reflexive group topologies on abelian groups of finite exponent	2012	Lydia Außenhofer Saak Gabriyelyan
+ PDF Chat	Topologies on groups determined by sets of convergent sequences	2012	Saak Gabriyelyan
+	Characterizable groups: Some results and open questions	2012	Saak Gabriyelyan
+	Characterizing sequences for precompact group topologies	2012	Dikran Dikranjan Saak Gabriyelyan V. Tarieladze
+	Finitely generated subgroups as von Neumann radicals of an Abelian group	2012	Saak Gabriyelyan
+ PDF Chat	Absolute Continuity and Singularity of Two Probability Measures on a Filtered Space	2011	Saak Gabriyelyan
+	Topologies on groups determined by sets of convergent sequences	2011	Saak Gabriyelyan
+	Pontryagin duality for Abelian $s$- and $sb$-groups	2011	Saak Gabriyelyan
+	On T-sequences and characterized subgroups	2010	Saak Gabriyelyan
+	Groups of quasi-invariance and the Pontryagin duality	2010	Saak Gabriyelyan
+	Minimally almost periodic group topology on countable torsion Abelian groups	2010	Saak Gabriyelyan
+	Minimally almost periodic group topology on infinite countable Abelian groups: A solution to Comfort's question	2010	Saak Gabriyelyan
+ PDF Chat	Reflexive group topologies on Abelian groups	2010	Saak Gabriyelyan
+ PDF Chat	Characterization of almost maximally almost-periodic groups	2009	Saak Gabriyelyan
+	Reflexive group topologies on Abelian groups	2009	Saak Gabriyelyan
+	Characterization of almost maximally almost-periodic groups	2009	Saak Gabriyelyan
+	On $T$-sequences and characterized subgroups	2009	Saak Gabriyelyan
+	Absolute continuity and singularity of two probability measures on a filtered space	2008	Saak Gabriyelyan
+	Groups of quasi-invariance and the Pontryagin duality	2008	Saak Gabriyelyan
+	On the Automorphically Stable Distributions on Abelian Groups	2001	Saak Gabriyelyan

Common Coauthors

Coauthor	Papers Together
Jerzy Ka̧kol	23
Тарас Банах	18
Sidney A. Morris	12
Lyubomyr Zdomskyy	7
Jan Grebík	6
J. C. Ferrando	4
Alexander V. Osipov	3
Dikran Dikranjan	3
Arkady Leiderman	3
Jerzy Kcakol	3
V. Tarieladze	2
Grzegorz Plebanek	2
Witold Marciszewski	1
Lydia Außenhofer	1
Manuel López Pellicer	1
Wiesław Kubiś	1
Daniel Alpay	1
Albert Kubzdela	1
J. Kcakol	1
Ігор Протасов	1

Commonly Cited References

Action	Title	Year	Authors	# of times referenced
+ PDF Chat	Locally Convex Spaces	1981	Hans Jarchow	31
+	On T-sequences and characterized subgroups	2010	Saak Gabriyelyan	22
+	Topologies on groups determined by sequences	1999	Ihor Protasov Evghen Zelenyuk	22
+	On the Ascoli property for locally convex spaces	2017	Saak Gabriyelyan	21
+	Groups of quasi-invariance and the Pontryagin duality	2010	Saak Gabriyelyan	20
+	FREE TOPOLOGICAL GROUPS OF METRIZABLE SPACES	1991	В. В. Успенский	20
+ PDF Chat	$k$-groups and duality	1970	N. Noble	20
+ PDF Chat	Topological Properties of Spaces of Continuous Functions	1988	R. A. McCoy Ibula Ntantu	19
+	Contributions to the duality theory of abelian topological groups and to the theory of nuclear groups	1999	Lydia Außenhofer	19
+ PDF Chat	On the $$C_k$$ C k -stable closure of the class of (separable) metrizable spaces	2015	Тарас Банах Saak Gabriyelyan	19
+	Topological Properties of Spaces of Continuous Functions	1988	Robert A. McCoy Ibula Ntantu	19
+	TOPOLOGIES ON ABELIAN GROUPS	1991	E. G. Zelenyuk Ігор Протасов	18
+	Rings of Continuous Functions	1960	Leonard Gillman Meyer Jerison	18
+ PDF Chat	The Ascoli property for function spaces and the weak topology of Banach and Fréchet spaces	2016	Saak Gabriyelyan Jerzy Ka̧kol Grzegorz Plebanek	17
+	Free topological groups	1974	B. V. S. Thomas	17
+	A characterization of the maximally almost periodic abelian groups	2004	Dikran Dikranjan Chiara Milan Alberto Tonolo	17
+ PDF Chat	On Mackey topology for groups	1999	M.J. Chasco Elena Martín-Peinador V. Tarieladze	16
+ PDF Chat	Free Topological Groups	1961	B. R. Gelbaum	16
+	Locally convex properties of free locally convex spaces	2019	Saak Gabriyelyan	15
+	Pontryagin duality for metrizable groups	1998	M.J. Chasco	15
+ PDF Chat	Additive Subgroups of Topological Vector Spaces	1991	Wojciech Banaszczyk	15
+	The Pontrjagin Duality Theorem in Linear Spaces	1952	Marianne Freundlich Smith	15
+ PDF Chat	The topological structure of (homogeneous) spaces and groups with countable cs∗-character	2004	Taras Banak Lubomyr Zdomskyi	14
+ PDF Chat	Normality in function spaces	1974	Roman Pol	14
+	Answer to Raczkowski's questions on convergent sequences of integers	2003	Giuseppina Barbieri Dikran Dikranjan Chiara Milan Hans Weber	14
+	Free topological vector spaces	2017	Saak Gabriyelyan Sidney A. Morris	14
+	Locally convex spaces and Schur type properties	2019	Saak Gabriyelyan	13
+	On the Mackey topology for abelian topological groups and locally convex spaces	2016	Saak Gabriyelyan	13
+	The strong Pytkeev property for topological groups and topological vector spaces	2014	Saak Gabriyelyan Jerzy Ka̧kol Arkady Leiderman	13
+	Fans and their applications in General Topology, Functional Analysis and Topological Algebra	2016	Тарас Банах	13
+ PDF Chat	Rings of Continuous Functions.	1961	E. R. Lorch Leonard Gillman Meyer Jerison	13
+ PDF Chat	On a generalization of Abelian sequential groups	2013	Saak Gabriyelyan	12
+	On uniformly discrete subsets in uniform spaces and topological groups	2016	Тарас Банах Saak Gabriyelyan Ігор Протасов	12
+	The structure of locally compact abelian groups	1981	D. L. Armacost	12
+	Generalized Metric Spaces	1984	Gary Gruenhage	12
+	Topological Vector Spaces	2010	Lawrence Narici Edward Beckenstein	12
+ PDF Chat	Topologies induced by groups of characters	1964	W. W. Comfort Keith W. Ross	11
+ PDF Chat	The Ascoli property for function spaces	2016	Saak Gabriyelyan Jan Grebík Jerzy Ka̧kol Lyubomyr Zdomskyy	11
+ PDF Chat	Making group topologies with, and without, convergent sequences	2006	W. W. Comfort S. U. Raczkowski F. Javier Trigos-Arrieta	11
+	Characterizing subgroups of compact abelian groups	2006	Dikran Dikranjan Kenneth Kunen	11
+	Handbook of Set-Theoretic Topology	1984	Stewart Baldwin	11
+ PDF Chat	Construction of group topologies on abelian groups	1972	J.W. Nienhuys	11
+ PDF Chat	Banach space theory: the basis for linear and nonlinear analysis	2011	Marián Fabian Petr Habala Petr Hájek Vicente Montesinos Václav Zizler	11
+ PDF Chat	Topologies on groups determined by sets of convergent sequences	2012	Saak Gabriyelyan	11
+	Sequences and Series in Banach Spaces	1984	Joseph Diestel	11
+ PDF Chat	Ascoli theorems and the exponential map	1969	N. Noble	11
+	On topological groups with a small base and metrizability	2015	Saak Gabriyelyan Jerzy Ka̧kol Arkady Leiderman	11
+	A characterization of barrelledness of C(X)	2016	Saak Gabriyelyan	11
+	Topological torsion related to some recursive sequences of integers	2008	Giuseppina Barbieri Dikran Dikranjan Chiara Milan Hans Weber	10
+	Totally bounded topological group topologies on the integers	2002	S. U. Raczkowski	10