| Publication | Date of Publication | Type |
|---|
| On extensions of countable filterbases to ultrafilters and ultrafilter compactness | 2018-05-03 | Paper |
| On the solvability of systems of linear equations over the ring $\mathbb{Z}$ of integers | 2017-09-11 | Paper |
| Unique nearness structures | 2016-10-20 | Paper |
| Finiteness classes and small violations of choice | 2016-09-01 | Paper |
| On preimages of ultrafilters in ZF | 2016-07-19 | Paper |
| On a Certain Notion of Finite and a Finiteness Class in Set Theory without Choice | 2016-01-06 | Paper |
| On the metric reflection of a pseudometric space in ZF | 2015-05-06 | 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 cardinal inequalityα2< 2α | 2013-11-19 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2898337 | 2012-07-10 | 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 |
| The finite and the infinite | 2011-05-11 | Paper |
| Remarks on the space \(\aleph_{1}\) in \(\mathbf {ZF}\) | 2011-01-13 | Paper |
| Odd-sized partitions of Russell-sets | 2010-04-15 | Paper |
| Topological sums and products in \textbf{ZF}-set theory | 2009-07-23 | Paper |
| Canonical subbase-compactness of topological products | 2009-07-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3633272 | 2009-06-18 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3606619 | 2009-02-26 | Paper |
| Binary Partitions in the Absence of Choice or Rearranging Russell's Socks | 2008-04-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5430142 | 2007-12-13 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3417729 | 2007-01-30 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3417826 | 2007-01-30 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3411966 | 2006-11-30 | Paper |
| On the epireflective hull of top in near | 2006-10-20 | Paper |
| Axiom of choice | 2006-07-11 | Paper |
| Graph-Coloring and Choice a Note on a Note by Shelah and Soifer | 2005-11-21 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3024384 | 2005-07-01 | Paper |
| Injective hulls are not natural. | 2005-04-19 | Paper |
| On Closure Operators, the Reals, and Choice | 2005-03-30 | Paper |
| Merotopological spaces | 2004-05-27 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4457311 | 2004-03-21 | Paper |
| Striking differences between ZF and ZF+weak choice in view of metric spaces | 2003-10-14 | Paper |
| The axiom of choice holds iff maximal closed filters exist | 2003-05-22 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4799935 | 2003-03-31 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4799954 | 2003-03-31 | Paper |
| Free factorizations | 2002-12-11 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3146268 | 2002-11-05 | Paper |
| The Baire category theorem and choice | 2002-08-28 | Paper |
| Weak factorization systems and topological functors | 2002-08-19 | Paper |
| IS THE CONSTRUCT OF L-TOPOLOGICAL SPACES A CO-TOWER EXTENSION OF SOME SIMPLER CONSTRUCT? | 2002-06-11 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2764169 | 2002-06-11 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2764177 | 2002-05-29 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2752025 | 2002-04-10 | Paper |
| Free adjunction of morphisms | 2002-01-17 | Paper |
| A Characterization of the Prime Closed Filter Compactification of a Topological Space | 2002-01-01 | Paper |
| ON THE STRICT COMPLETION OF A NEARNESS SPACE | 2001-12-16 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4521127 | 2001-04-24 | Paper |
| Nearness, subfitness and sequential regularity | 2001-02-11 | Paper |
| Generating ordered topological spaces from LOTS | 2000-08-14 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4933939 | 2000-08-03 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4955903 | 2000-05-22 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4955904 | 2000-05-22 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4247155 | 2000-05-17 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4947414 | 2000-04-25 | Paper |
| Countable choice and pseudometric spaces | 1999-10-18 | Paper |
| Categorical properties of probabilistic convergence spaces | 1999-07-28 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4229103 | 1999-03-03 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4394844 | 1999-02-11 | Paper |
| MAXIMAL FILTERS, CONTINUITY AND CHOICE PRINCIPLES | 1999-02-02 | Paper |
| Powers of 2. | 1999-01-01 | Paper |
| Morita-extensions and nearness-completions | 1998-09-07 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4399865 | 1998-07-29 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4373422 | 1998-03-12 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4353276 | 1998-02-17 | Paper |
| Compactness and the axiom of choice | 1998-02-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4372983 | 1998-01-27 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4870552 | 1996-11-26 | Paper |
| FACTORIZATION OF FLOWS AND COMPLETENESS OF CATEGORIES | 1995-04-03 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4281187 | 1994-10-19 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3139896 | 1994-10-17 | Paper |
| Compact \(T_ 0\)-spaces and \(T_ 0\)-compactification | 1994-09-28 | Paper |
| Essential extensions of Hausdorff spaces | 1994-08-10 | Paper |
| Some open categorical problems in Top | 1994-07-18 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4280778 | 1994-06-26 | Paper |
| Almost reflective subcategories of \(\mathbf T \mathbf o \mathbf p\) | 1993-06-29 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4039842 | 1993-06-05 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4693062 | 1993-06-05 | Paper |
| Hyperconvex hulls of metric spaces | 1993-02-18 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4010277 | 1992-09-27 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3994006 | 1992-08-13 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3976460 | 1992-06-26 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3976467 | 1992-06-26 | Paper |
| Convergence | 1992-06-25 | Paper |
| A characterization of concrete quasitopoi by injectivity | 1990-01-01 | Paper |
| Galois connections categorically | 1990-01-01 | Paper |
| REMARKS ON CATEGORIES OF ALGEBRAS DEFINED BY A PROPER CLASS OF OPERATIONS | 1990-01-01 | Paper |
| Monadic decompositions | 1989-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3485576 | 1989-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3808286 | 1988-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3810811 | 1988-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3810812 | 1988-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3825047 | 1988-01-01 | Paper |
| Factorizations, denseness, separation, and relatively compact objects | 1987-01-01 | Paper |
| Topological improvements of categories of structured sets | 1987-01-01 | Paper |
| The category of Cauchy spaces is Cartesian closed | 1987-01-01 | Paper |
| CARTESIAN CLOSED TOPOLOGICAL HULLS AS INJECTIVE HULLS | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4723784 | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3717808 | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3719459 | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3729135 | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3729138 | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3735912 | 1986-01-01 | Paper |
| ESSENTIALLY ALGEBRAIC CATEGORIES | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3764865 | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3764866 | 1986-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3697794 | 1985-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3725157 | 1985-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3220539 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3341028 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3706146 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3968115 | 1983-01-01 | Paper |
| Are there convenient subcategories of Top? | 1983-01-01 | Paper |
| The quasicategory of quasispaces is illegitimate | 1983-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3957107 | 1982-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5186363 | 1982-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3041390 | 1982-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3923246 | 1981-01-01 | Paper |
| Equivalence of Topologically-Algebraic and Semi-Topological Functors | 1980-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4183448 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4189414 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4189415 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4189804 | 1979-01-01 | Paper |
| LIGHT FACTORIZATION STRUCTURES | 1979-01-01 | Paper |
| Semi-universal maps and universal initial completions | 1979-01-01 | Paper |
| Local Compactness and Simple Extensions of Discrete Spaces | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3852809 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3855353 | 1979-01-01 | Paper |
| Dispersed Factorization Structures | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3874378 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3876100 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3877831 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3914053 | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4161829 | 1978-01-01 | Paper |
| The reals and the reals | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4192658 | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4194099 | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3886488 | 1978-01-01 | Paper |
| Cartesian Closed Topological Hulls | 1977-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4147255 | 1977-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4160073 | 1977-01-01 | Paper |
| On the relations P(X×Y)=PX×PY | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4092619 | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4111746 | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4113080 | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4114502 | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4127023 | 1976-01-01 | Paper |
| Initial completions | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4069962 | 1975-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4098337 | 1975-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4069460 | 1974-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4079792 | 1974-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4102459 | 1974-01-01 | Paper |
| Topological functors | 1974-01-01 | Paper |
| A concept of nearness | 1974-01-01 | Paper |
| On the extendibility of continuous functions | 1974-01-01 | Paper |
| Regular Categories and Regular Functors | 1974-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5682456 | 1973-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4095029 | 1972-01-01 | Paper |
| Coreflective subcategories in general topology | 1972-01-01 | Paper |
| Identities in Categories | 1972-01-01 | Paper |
| Categorical topology | 1971-01-01 | Paper |
| Coreflective Subcategories | 1971-01-01 | Paper |
| Algebra ∩ topology = compactness | 1971-01-01 | Paper |
| A characterization of k-ary algebraic categories | 1971-01-01 | Paper |
| Regular-Closed, Urysohn-Closed and Completely Hausdorff-Closed Spaces | 1970-01-01 | Paper |
| An example in category theory | 1970-01-01 | Paper |
| Factorizations of morphisms \(f:B\to FA\) | 1970-01-01 | Paper |
| Separation Axioms and Direct Limits | 1969-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5572088 | 1969-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5580900 | 1969-01-01 | Paper |
| Limit-Operators and Topological Coreflections | 1969-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5602636 | 1969-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5540226 | 1968-01-01 | Paper |
| \(H\)-closed spaces and reflective subcategories | 1968-01-01 | Paper |
| Strengthening Alexander's subbase theorem | 1968-01-01 | Paper |
| On intersections of compact sets | 1968-01-01 | Paper |
| Topologische Reflexionen und Coreflexionen | 1968-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5534000 | 1967-01-01 | Paper |
| Quotienten geordneter Räume und Folgenkonvergenz | 1967-01-01 | Paper |
| Fortsetzbarkeit stetiger Abbildungen und Kompaktheitsgrad topologischer Räume. (Extendability of continuous mappings and compactness degree of topological spaces) | 1967-01-01 | Paper |
| E-kompakte Räume. (E-compact spaces) | 1967-01-01 | Paper |
| Nicht alle \(T_ 2\)-minimalen Räume sind von 2. Kategorie. (Not all \(T_ 2\)-minimal spaces are of second category) | 1966-01-01 | Paper |
| Ordnungsfähigkeit zusammenhängender Räume | 1965-01-01 | Paper |
| Wann sind alle stetigen Abbildungen in \(Y\) konstant? (When are all continuous mappings in \(Y\) constant?) | 1965-01-01 | Paper |
| Ordnungsfähigkeit total-diskontinuierlicher Räume | 1965-01-01 | Paper |
| \(T_\nu\)-Abgeschlossenheit und \(T_\nu\)-Minimalität. (\(T_\nu\)-closedness and \(T_\nu\)-minimality) | 1965-01-01 | Paper |
