| Publication | Date of Publication | Type |
|---|
| On \(P\)-spaces and \(G_{\delta}\)-sets in the absence of the axiom of choice | 2024-01-16 | Paper |
| On Hausdorff operators in ZF$\mathsf {ZF}$ | 2023-09-15 | Paper |
| On iso-dense and scattered spaces without \textbf{AC} | 2023-07-10 | Paper |
| Independent families and some notions of finiteness | 2023-06-05 | Paper |
| Countable products and countable direct sums of compact metrizable spaces in the absence of the Axiom of Choice | 2023-05-19 | Paper |
| Stranger things about the cardinality of compact metric spaces without AC | 2023-01-23 | Paper |
| Cuf products and cuf sums of (quasi-) metrizable spaces in ZF | 2023-01-23 | Paper |
| On subcompactness and countable subcompactness of metrizable spaces in ZF | 2022-11-07 | Paper |
| \(k\)-spaces, sequential spaces and related topics in the absence of the axiom of choice | 2022-08-20 | Paper |
| Compact complement topologies and k-spaces | 2022-05-31 | Paper |
| Denumerable cellular families in \(\mathbf{ZF}\) | 2022-02-22 | Paper |
| $P$-spaces in the absence of the Axiom of Choice | 2021-11-27 | Paper |
| Several results on compact metrizable spaces in \(\mathbf{ZF} \) | 2021-08-27 | Paper |
| Second-countable compact Hausdorff spaces as remainders in \textbf{ZF} and two new notions of infiniteness | 2021-06-14 | Paper |
| On subcompactness and countable subcompactness of metrizable spaces in ZF | 2021-02-22 | Paper |
| On densely complete metric spaces and extensions of uniformly continuous functions in $\mathbf{ZF}$ | 2020-11-09 | Paper |
| On Loeb and sequential spaces in \textbf{ZF} | 2020-07-08 | Paper |
| Two new equivalents of Lindelöf metric spaces | 2020-05-11 | Paper |
| Cuf products and cuf sums of (quasi)-metrizable spaces in $\mathbf{ZF}$ | 2020-04-27 | Paper |
| Cellularity of infinite Hausdorff spaces in \textbf{ZF} | 2020-03-24 | Paper |
| Denumerable cellular families in Hausdorff spaces and towers of Boolean algebras in $\mathbf{ZF}$ | 2020-01-02 | Paper |
| On lightly and countably compact spaces in ZF | 2019-07-03 | Paper |
| Hausdorff compactifications in ZF | 2019-04-24 | Paper |
| On pseudocompactness and light compactness of metric spaces in $\mathbf {ZF}$ | 2019-01-30 | Paper |
| On pseudocompactness and related notions in ZF | 2018-09-20 | Paper |
| Some versions of second countability of metric spaces in ZF and their role to compactness | 2018-06-15 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4642660 | 2018-05-25 | Paper |
| On extensions of countable filterbases to ultrafilters and ultrafilter compactness | 2018-05-03 | Paper |
| On metric spaces where continuous real valued functions are uniformly continuous and related notions | 2018-03-16 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4600944 | 2018-01-18 | Paper |
| Uniform continuity and normality of metric spaces in $\mathbf{ZF}$ | 2017-11-30 | Paper |
| Metric spaces on which continuous functions are ``almost uniformly continuous | 2017-11-09 | Paper |
| Some Notions of Separability of Metric Spaces in $\mathbf {ZF}$ and Their Relation to Compactness | 2017-01-25 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2954181 | 2017-01-12 | Paper |
| Non-discrete metrics in and some notions of finiteness | 2016-10-24 | Paper |
| On Sequential Compactness and Related Notions of Compactness of Metric Spaces in $\mathbf {ZF}$ | 2016-09-02 | Paper |
| On metric spaces where continuous real valued functions are uniformly continuous in \(\mathbf{ZF}\) | 2016-08-31 | Paper |
| On preimages of ultrafilters in ZF | 2016-07-19 | Paper |
| On the metric reflection of a pseudometric space in ZF | 2015-05-06 | Paper |
| On sequentially closed subsets of the real line in | 2015-03-19 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5174635 | 2015-02-18 | Paper |
| The Boolean prime ideal theorem and products of cofinite topologies | 2014-02-05 | Paper |
| Separable connected metric spaces need not have continuum size in \(\mathbf{ZF}\) | 2013-12-09 | Paper |
| On Russell and Anti Russell-Cardinals | 2013-11-19 | Paper |
| The existence of free ultrafilters on ω does not imply the extension of filters on ω to ultrafilters | 2013-10-30 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2850623 | 2013-09-27 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2850656 | 2013-09-27 | Paper |
| On BPI Restricted to Boolean Algebras of Size Continuum | 2013-03-18 | Paper |
| On the relative strength of forms of compactness of metric spaces and their countable productivity in \(\mathbf {\text{ZF}}\) | 2012-10-11 | Paper |
| Compact and Loeb Hausdorff spaces in \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$\mathsf {ZF}$\end{document} and the axiom of choice for families of finite sets | 2012-06-01 | Paper |
| Remarks on the Stone Spaces of the Integers and the Reals without AC | 2011-11-22 | Paper |
| Extending compact topologies to compact Hausdorff topologies in \(\mathbf {ZF}\) | 2011-11-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3090766 | 2011-09-01 | Paper |
| Remarks on the space \(\aleph_{1}\) in \(\mathbf {ZF}\) | 2011-01-13 | Paper |
| Tychonoff products of compact spaces in ZF and closed ultrafilters | 2010-11-04 | Paper |
| Products of some special compact spaces and restricted forms of AC | 2010-10-04 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3562041 | 2010-05-20 | Paper |
| Topological sums and products in \textbf{ZF}-set theory | 2009-07-23 | Paper |
| Different versions of a first countable space without choice | 2009-07-23 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3633272 | 2009-06-18 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3606619 | 2009-02-26 | Paper |
| Unions and the axiom of choice | 2008-12-10 | Paper |
| On the Compactness and Countable Compactness of 2Rin ZF | 2008-02-01 | Paper |
| Countable compact Hausdorff spaces need not be metrizable in ZF | 2007-02-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3417729 | 2007-01-30 | Paper |
| Tychonoff Products of Two-Element Sets and Some Weakenings of the Boolean Prime Ideal Theorem | 2007-01-10 | Paper |
| Countable Compact Scattered T2Spaces and Weak Forms of AC | 2007-01-10 | Paper |
| Properties of the real line and weak forms of the Axiom of Choice | 2005-11-15 | Paper |
| Weak axioms of choice for metric spaces | 2005-08-29 | Paper |
| On sequentially compact subspaces of \(\mathbb R\) without the axiom of choice | 2005-07-13 | Paper |
| Countable sums and products of metrizable spaces in ZF | 2005-02-16 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4824889 | 2004-11-01 | Paper |
| Consequences of the failure of the axiom of choice in the theory of Lindelöf metric spaces | 2004-03-29 | Paper |
| Choice principles for special subsets of the real line | 2003-11-10 | Paper |
| Metric spaces and the axiom of choice | 2003-11-10 | Paper |
| Striking differences between ZF and ZF+weak choice in view of metric spaces | 2003-10-14 | Paper |
| Disasters in topology without the axiom of choice | 2003-09-16 | Paper |
| Some weak forms of the Baire category theorem | 2003-07-31 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4787868 | 2003-07-16 | Paper |
| The failure of the axiom of choice implies unrest in the theory of Lindelöf metric spaces | 2003-04-10 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4799954 | 2003-03-31 | Paper |
| Products of compact spaces and the axiom of choice II | 2003-03-19 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4487249 | 2002-09-16 | Paper |
| The Baire category theorem and choice | 2002-08-28 | Paper |
| Nonconstructive properties of well-ordered T\(_2\) topological spaces | 2002-07-16 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2743653 | 2002-06-06 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2731710 | 2002-04-15 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2761034 | 2001-12-17 | Paper |
| Some Weak Forms of the Axiom of Choice Restricted to the Real Line | 2001-09-27 | Paper |
| Compact Metric Spaces and Weak Forms of the Axiom of Choice | 2001-09-14 | Paper |
| The Vector Space Kinna-Wagner Principle is Equivalent to the Axiom of Choice | 2001-06-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4521132 | 2001-06-25 | Paper |
| On Weierstrass compact pseudometric spaces and a weak form of the axiom of choice | 2001-04-24 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4521127 | 2001-04-24 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4939396 | 2000-08-23 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4496324 | 2000-08-13 | Paper |
| On Lindelöf Metric Spaces and Weak Forms of the Axiom of Choice | 2000-06-07 | Paper |
| Some remarks on category of the real line | 2000-03-29 | Paper |
| Some equivalents of AC in algebra. II | 2000-02-27 | Paper |
| Weak Hausdorff Gaps and the 𝔭 ≤ t Problem | 2000-01-25 | Paper |
| Filters, Antichains and Towers in Topological Spaces and the Axiom of Choice | 1999-05-04 | Paper |
| Disjoint Unions of Topological Spaces and Choice | 1999-01-06 | Paper |
| Powers of 2. | 1999-01-01 | Paper |
| Some equivalents of AC in algebra | 1998-11-24 | Paper |
| Versions of Normality and Some Weak Forms of the Axiom of Choice | 1998-09-27 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4376666 | 1998-08-09 | Paper |
| Extending Independent Sets to Bases and the Axiom of Choice | 1998-06-24 | Paper |
| Bases for vector spaces over the two-element field and the axiom of choice | 1997-04-07 | Paper |
| On the Covering and the Additivity Number of the Real Line | 1995-08-21 | Paper |
| Partition reals and the consistency of t > add(R) | 1994-11-24 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4005236 | 1992-09-27 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4005257 | 1992-09-27 | Paper |
| A Note on Shoenfield's Unramified Forcing | 1992-06-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3977685 | 1992-06-25 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3197823 | 1990-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3490604 | 1990-01-01 | Paper |
| On the associativity and commutativity of multiplication of infinite matrices | 1988-01-01 | Paper |
| Unramified forcing preserving the law of double negation | 1987-01-01 | Paper |
