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+
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Twins of conic hexagons
|
2024
|
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
|
Pairing powers of pythagorean pairs
|
2024
|
Lorenz Halbeısen
Norbert Hungerbühler
Arman Shamsi Zargar
|
|
+
|
More configurations on elliptic curves
|
2024
|
Marco Bramato
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
|
Implications of Ramsey Choice principles in ZF$\mathsf {ZF}$
|
2024
|
Lorenz Halbeısen
Riccardo Plati
Saharon Shelah
|
|
+
PDF
Chat
|
Pairing Powers of Pythagorean Pairs
|
2024
|
Lorenz Halbeısen
Norbert Hungerbühler
Arman Shamsi Zargar
|
|
+
PDF
Chat
|
Three Conics Determine a Cubic
|
2024
|
Lorenz Halbeısen
Norbert Hungerbühler
Vera Stalder
|
|
+
PDF
Chat
|
The Pentagon Theorem in Miquelian Möbius Planes
|
2023
|
Lorenz Halbeısen
Norbert Hungerbühler
Vanessa Loureiro
|
|
+
PDF
Chat
|
The Hidden Twin of Morley’s Five Circles Theorem
|
2023
|
Lorenz Halbeisen
Norbert Hungerbühler
Vanessa Loureiro
|
|
+
PDF
Chat
|
Halfway new cardinal characteristics
|
2023
|
Jörg Brendle
Lorenz Halbeısen
Lukas Daniel Klausner
Marc Lischka
Saharon Shelah
|
|
+
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Halving formulae for points on elliptic curves
|
2023
|
Lorenz Halbeisen
Norbert Hungerbuehler
|
|
+
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Implications of Ramsey Choice Principles in ZF
|
2023
|
Lorenz Halbeisen
Riccardo Plati
Saharon Shelah
|
|
+
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Properties of Hesse derivatives of cubic curves
|
2023
|
Sayan Deb Dutta
Lorenz Halbeisen
Norbert Hungerbühler
|
|
+
|
Gleichmächtigkeit
|
2023
|
Lorenz Halbeisen
Regula Krapf
|
|
+
|
Irrationalität und Transzendenz
|
2023
|
Lorenz Halbeisen
Regula Krapf
|
|
+
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Kardinalzahlen
|
2023
|
Lorenz Halbeisen
Regula Krapf
|
|
+
|
Unendliche Mengen
|
2023
|
Lorenz Halbeisen
Regula Krapf
|
|
+
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Determiniertheit unendlicher Spiele
|
2023
|
Lorenz Halbeisen
Regula Krapf
|
|
+
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Eine Entdeckungsreise in die Welt des Unendlichen
|
2023
|
Lorenz Halbeisen
Regula Krapf
|
|
+
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Das Banach-Tarski-Paradoxon
|
2023
|
Lorenz Halbeisen
Regula Krapf
|
|
+
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Unendlichkeit in der Antike
|
2023
|
Lorenz Halbeisen
Regula Krapf
|
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+
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Kardinalitäten und Wohlordnungen
|
2023
|
Lorenz Halbeisen
Regula Krapf
|
|
+
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Das Auswahlaxiom
|
2023
|
Lorenz Halbeisen
Regula Krapf
|
|
+
PDF
Chat
|
A geometric approach to elliptic curves with torsion groups Z/10Z, Z/12Z, Z/14Z, and Z/16Z
|
2023
|
Lorenz Halbeisen
Norbert Hungerbühler
Arman Shamsi Zargar
Maksym Voznyy
|
|
+
PDF
Chat
|
Some implications of Ramsey Choice for families of $$\varvec{n}$$-element sets
|
2022
|
Lorenz Halbeısen
Salome Schumacher
|
|
+
PDF
Chat
|
Quadrilaterals as Geometric Loci
|
2022
|
Lorenz Halbeisen
Norbert Hungerbühler
Juan Läuchli
|
|
+
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Four cardinals and their relations in ZF
|
2022
|
Lorenz Halbeısen
Riccardo Plati
Salome Schumacher
Saharon Shelah
|
|
+
|
Configurations on elliptic curves
|
2022
|
Andrin Halbeisen
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
PDF
Chat
|
A family of congruent number elliptic curves of rank three
|
2022
|
Lorenz Halbeısen
Norbert Hungerbühler
Arman Shamsi Zargar
|
|
+
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A geometric approach to elliptic curves with torsion groups $\mathbb{Z}/10\mathbb{Z}$, $\mathbb{Z}/12\mathbb{Z}$, $\mathbb{Z}/14\mathbb{Z}$, and $\mathbb{Z}/16\mathbb{Z}$.
|
2021
|
Lorenz Halbeisen
Norbert Hungerbuehler
Maksym Voznyy
Arman Shamsi Zargar
|
|
+
PDF
Chat
|
Reversion Porisms in Conics
|
2021
|
Lorenz Halbeisen
Norbert Hungerbühler
Marco Schiltknecht
|
|
+
|
Vive la Diff\'erence!
|
2021
|
Lorenz Halbeısen
Riccardo Plati
Salome Schumacher
Saharon Shelah
|
|
+
PDF
Chat
|
Constructing cubic curves with involutions
|
2021
|
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
|
Reversion Porisms in Conics
|
2021
|
Lorenz Halbeisen
Norbert Hungerbühler
Marco Schiltknecht
|
|
+
|
Pairing pythagorean pairs
|
2021
|
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
|
Constructing Cubic Curves with Involutions
|
2021
|
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
|
New Parametrisations of Elliptic Curves with Torsion Groups Z/10Z, Z/12Z, and Z/14Z
|
2021
|
Lorenz Halbeisen
Norbert Hungerbuehler
Arman Shamsi Zargar
|
|
+
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Sets of range uniqueness for multivariate polynomials and linear functions with rank <i>k</i>
|
2021
|
Lorenz Halbeısen
Norbert Hungerbühler
Salome Schumacher
Guo Xian Yau
|
|
+
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Pairing Pythagorean Pairs.
|
2021
|
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
|
A New Weak Choice Principle
|
2021
|
Lorenz Halbeisen
Riccardo Plati
Salome Schumacher
|
|
+
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Some implications of Ramsey Choice for n-element sets
|
2021
|
Lorenz Halbeisen
Salome Schumacher
|
|
+
PDF
Chat
|
On primitive solutions of the Diophantine equation <i>x</i> <sup>2</sup> + <i>y</i> <sup>2</sup> = <i>M</i>
|
2021
|
Chris Busenhart
Lorenz Halbeısen
Norbert Hungerbühler
Oliver Riesen
|
|
+
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Sehnen, Sekanten und Chordalen
|
2021
|
Lorenz Halbeisen
Norbert Hungerbühler
Juan Läuchli
|
|
+
|
Inversion am Kreis
|
2021
|
Lorenz Halbeısen
Norbert Hungerbühler
Juan Läuchli
|
|
+
|
Peripheriewinkelsatz
|
2021
|
Lorenz Halbeısen
Norbert Hungerbühler
Juan Läuchli
|
|
+
|
Reversion Porisms in Conics
|
2021
|
Lorenz Halbeisen
Norbert Hungerbühler
Marco Schiltknecht
|
|
+
|
Constructing Cubic Curves with Involutions
|
2021
|
Lorenz Halbeisen
Norbert Hungerbühler
|
|
+
|
A geometric approach to elliptic curves with torsion groups $\mathbb{Z}/10\mathbb{Z}$, $\mathbb{Z}/12\mathbb{Z}$, $\mathbb{Z}/14\mathbb{Z}$, and $\mathbb{Z}/16\mathbb{Z}$
|
2021
|
Lorenz Halbeisen
Norbert Hungerbuehler
Maksym Voznyy
Arman Shamsi Zargar
|
|
+
|
Pairing Pythagorean Pairs
|
2021
|
Lorenz Halbeisen
Norbert Hungerbühler
|
|
+
|
A New Weak Choice Principle
|
2021
|
Lorenz Halbeisen
Riccardo Plati
Salome Schumacher
|
|
+
|
Magic sets for polynomials of degree n
|
2020
|
Lorenz Halbeısen
Norbert Hungerbühler
Salome Schumacher
|
|
+
|
Generalized pencils of conics derived from cubics
|
2020
|
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
|
Heron triangles and their elliptic curves
|
2020
|
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
|
Models of Peano Arithmetic
|
2020
|
Lorenz Halbeisen
Regula Krapf
|
|
+
|
Countable Models of Peano Arithmetic
|
2020
|
Lorenz Halbeisen
Regula Krapf
|
|
+
|
Arithmetic in Peano Arithmetic
|
2020
|
Lorenz Halbeisen
Regula Krapf
|
|
+
|
The Art of Proof
|
2020
|
Lorenz Halbeisen
Regula Krapf
|
|
+
|
Sets and multisets of range uniqueness for polynomials
|
2019
|
Lorenz Halbeısen
Norbert Hungerbühler
Salome Schumacher
|
|
+
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On Ramsey choice and partial choice for infinite families of n-element sets
|
2019
|
Lorenz Halbeısen
Eleftherios Tachtsis
|
|
+
|
A geometric representation of integral solutions of <i>x</i><sup>2</sup> + <i>xy</i> + <i>y</i><sup>2</sup> = <i>m</i><sup>2</sup>
|
2019
|
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
PDF
Chat
|
A Theorem of Fermat on Congruent Number Curves
|
2019
|
Lorenz Halbeisen
Norbert Hungerbühler
|
|
+
PDF
Chat
|
A Theorem of Fermat on Congruent Number Curves
|
2019
|
Lorenz Halbeisen
Norbert Hungerbühler
|
|
+
|
Congruent Number Elliptic Curves Related to Integral Solutions of m2 = n2 + nl + n2
|
2019
|
Lorenz Halbeisen
Norbert Hungerbühler
|
|
+
PDF
Chat
|
Forms of Choice in Ring Theory
|
2018
|
Lorenz Halbeısen
Norbert Hungerbühler
Nir Lazarovich
Waltraud Lederle
Marc Lischka
Salome Schumacher
|
|
+
PDF
Chat
|
Halfway New Cardinal Characteristics
|
2018
|
Jörg Brendle
Lorenz Halbeisen
Lukas Daniel Klausner
Marc Lischka
Saharon Shelah
|
|
+
|
Combinatorial Set Theory : With a Gentle Introduction to Forcing
|
2018
|
Lorenz Halbeisen
|
|
+
|
Congruent number elliptic curves with rank at least two
|
2018
|
Lorenz Halbeisen
Norbert Hungerbühler
|
|
+
|
A Theorem of Fermat on Congruent Number Curves
|
2018
|
Lorenz Halbeisen
Norbert Hungerbühler
|
|
+
|
Halfway New Cardinal Characteristics
|
2018
|
Jörg Brendle
Lorenz Halbeisen
Lukas Daniel Klausner
Marc Lischka
Saharon Shelah
|
|
+
|
A weird relation between two cardinals
|
2017
|
Lorenz Halbeısen
|
|
+
PDF
Chat
|
Closed chains of conics carrying poncelet triangles
|
2017
|
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
|
Suslin’s Problem
|
2017
|
Lorenz Halbeisen
|
|
+
|
Axioms of Set Theory
|
2017
|
Lorenz Halbeısen
|
|
+
|
How Many Ramsey Ultrafilters Exist?
|
2017
|
Lorenz Halbeisen
|
|
+
|
Thirteen Cardinals and Their Relations
|
2017
|
Lorenz Halbeısen
|
|
+
|
Forms of Choice
|
2017
|
Lorenz Halbeısen
|
|
+
|
First-Order Logic in a Nutshell
|
2017
|
Lorenz Halbeısen
|
|
+
|
Combinatorial Set Theory
|
2017
|
Lorenz Halbeısen
|
|
+
|
Suite
|
2017
|
Lorenz Halbeısen
|
|
+
|
Cohen Forcing Revisited
|
2017
|
Lorenz Halbeısen
|
|
+
|
Combining Forcing Notions
|
2017
|
Lorenz Halbeısen
|
|
+
|
The Notion of Forcing
|
2017
|
Lorenz Halbeısen
|
|
+
|
Mathias Forcing
|
2017
|
Lorenz Halbeısen
|
|
+
|
Properties of Forcing Extensions
|
2017
|
Lorenz Halbeısen
|
|
+
|
The Shattering Number Revisited
|
2017
|
Lorenz Halbeısen
|
|
+
|
Silver-Like Forcing Notions
|
2017
|
Lorenz Halbeısen
|
|
+
|
Happy Families and Their Relatives
|
2017
|
Lorenz Halbeısen
|
|
+
|
Overture: Ramsey’s Theorem
|
2017
|
Lorenz Halbeısen
|
|
+
|
Models of Set Theory with Atoms
|
2017
|
Lorenz Halbeısen
|
|
+
|
Sacks Forcing
|
2017
|
Lorenz Halbeısen
|
|
+
|
How to Make Two Balls from One
|
2017
|
Lorenz Halbeısen
|
|
+
|
Miller Forcing
|
2017
|
Lorenz Halbeısen
|
|
+
|
Models in Which 𝔭 = 𝔠 $$\mathfrak{p} = \mathfrak{c}$$
|
2017
|
Lorenz Halbeısen
|
|
+
|
Cardinal Relations in ZF Only
|
2017
|
Lorenz Halbeısen
|
|
+
|
Coda: A Dual Form of Ramsey’s Theorem
|
2017
|
Lorenz Halbeisen
|
|
+
|
Combinatorial Properties of Sets of Partitions
|
2017
|
Lorenz Halbeısen
|
|
+
|
Martin’s Axiom
|
2017
|
Lorenz Halbeısen
|
|
+
|
Harmonische Punkte am Kreis
|
2016
|
Lorenz Halbeısen
Norbert Hungerbühler
Juan Läuchli
|
|
+
|
Inversion am Kreis
|
2016
|
Lorenz Halbeısen
Norbert Hungerbühler
Juan Läuchli
|
|
+
|
Mit harmonischen Verhältnissen zu Kegelschnitten
|
2016
|
Lorenz Halbeisen
Norbert Hungerbühler
Juan Läuchli
|
|
+
|
Peripheriewinkelsatz
|
2016
|
Lorenz Halbeisen
Norbert Hungerbühler
Juan Läuchli
|
|
+
|
Harmonische Geradenbüschel
|
2016
|
Lorenz Halbeisen
Norbert Hungerbühler
Juan Läuchli
|
|
+
|
A Simple Proof of Poncelet's Theorem (on the Occasion of Its Bicentennial)
|
2015
|
Lorenz Halbeisen
Norbert Hungerbühler
|
|
+
|
An Elementary Proof of Poncelet’s Theorem (on the occasion to its bicentennial)
|
2014
|
Lorenz Halbeisen
Norbert Hungerbühler
|
|
+
|
Combining Forcing Notions
|
2011
|
Lorenz Halbeısen
|
|
+
|
Overture: Ramsey’s Theorem
|
2011
|
Lorenz Halbeısen
|
|
+
|
Cohen Forcing Revisited
|
2011
|
Lorenz Halbeisen
|
|
+
|
Models of Set Theory with Atoms
|
2011
|
Lorenz Halbeısen
|
|
+
|
The Notion of Forcing
|
2011
|
Lorenz Halbeısen
|
|
+
|
Cardinal Relations in ZF Only
|
2011
|
Lorenz Halbeısen
|
|
+
|
How to Make Two Balls from One
|
2011
|
Lorenz Halbeısen
|
|
+
|
Martin’s Axiom
|
2011
|
Lorenz Halbeısen
|
|
+
|
Models in Which $\mathfrak {p}=\mathfrak {c}$
|
2011
|
Lorenz Halbeısen
|
|
+
|
The Shattering Number Revisited
|
2011
|
Lorenz Halbeısen
|
|
+
|
Twelve Cardinals and Their Relations
|
2011
|
Lorenz Halbeısen
|
|
+
|
Models of Finite Fragments of Set Theory
|
2011
|
Lorenz Halbeısen
|
|
+
|
Combinatorial Properties of Sets of Partitions
|
2011
|
Lorenz Halbeısen
|
|
+
|
The Axiom of Choice
|
2011
|
Lorenz Halbeısen
|
|
+
|
Silver-Like Forcing Notions
|
2011
|
Lorenz Halbeısen
|
|
+
|
Miller Forcing
|
2011
|
Lorenz Halbeısen
|
|
+
|
Mathias Forcing
|
2011
|
Lorenz Halbeısen
|
|
+
|
Suite
|
2011
|
Lorenz Halbeısen
|
|
+
|
Combinatorial Set Theory
|
2011
|
Lorenz Halbeısen
|
|
+
|
Coda: A Dual Form of Ramsey’s Theorem
|
2011
|
Lorenz Halbeısen
|
|
+
|
Properties of Forcing Extensions
|
2011
|
Lorenz Halbeisen
|
|
+
|
On the Existence of Ramsey Ultrafilters
|
2011
|
Lorenz Halbeısen
|
|
+
|
The Axioms of Zermelo–Fraenkel Set Theory
|
2011
|
Lorenz Halbeısen
|
|
+
|
Happy Families and Their Relatives
|
2011
|
Lorenz Halbeisen
|
|
+
PDF
Chat
|
Remark on our paper ``On bases in Banach spaces'' (Studia Math. 170 (2005), 147–171)
|
2009
|
Tomek Bartoszyński
Mirna Džamonja
Lorenz Halbeısen
Eva Murtinová
Anatolij Plichko
|
|
+
PDF
Chat
|
Non-separable Banach spaces with non-meager Hamel basis
|
2008
|
Тарас Банах
Mirna Džamonja
Lorenz Halbeısen
|
|
+
|
Minimal generating sets of groups, rings, and fields
|
2007
|
Lorenz Halbeısen
Martin Hamilton
Pavel Růžička
|
|
+
PDF
Chat
|
Avoiding arithmetic progressions in cyclic groups
|
2005
|
Lorenz Halbeısen
Stephanie Halbeisen
|
|
+
|
Silver Measurability and its relation to other regularity properties
|
2005
|
Jörg Brendle
Lorenz Halbeısen
Benedikt Löwe
|
|
+
|
On bases in Banach spaces
|
2005
|
Tomek Bartoszyński
Mirna Džamonja
Lorenz Halbeısen
Eva Murtinová
Anatolij Plichko
|
|
+
|
A NUMBER-THEORETIC CONJECTURE AND ITS IMPLICATION FOR SET THEORY
|
2005
|
Lorenz Halbeisen
|
|
+
|
Families of almost disjoint Hamel bases
|
2005
|
Lorenz Halbeısen
|
|
+
PDF
Chat
|
On asymptotic models in Banach Spaces
|
2004
|
Lorenz Halbeısen
Edward Odell
|
|
+
PDF
Chat
|
Fans and Bundles in the Graph of Pairwise Sums and Products
|
2004
|
Lorenz Halbeısen
|
|
+
PDF
Chat
|
On a Theorem of Banach and Kuratowski and $K$-Lusin Sets
|
2003
|
Tomek Bartoszyński
Lorenz Halbeısen
|
|
+
|
On the Cardinality of Smallest Spanning Sets of Rings
|
2003
|
Nadia Boudi
Lorenz Halbeisen
|
|
+
|
Can Kirkman's Schoolgirls Walk Abreast by Forming Arithmetic Progressions?
|
2003
|
Lorenz Halbeisen
|
|
+
|
A generalization of the Dual Ellentuck Theorem
|
2003
|
Lorenz Halbeısen
Pierre Matet
|
|
+
|
Making doughnuts of Cohen reals
|
2003
|
Lorenz Halbeısen
|
|
+
|
A Result in Dual Ramsey Theory
|
2002
|
Lorenz Halbeısen
Pierre Matet
|
|
+
|
On continuously Urysohn and strongly separating spaces
|
2002
|
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
|
Ultrafilter spaces on the semilattice of partitions
|
2001
|
Lorenz Halbeısen
Benedikt Löwe
|
|
+
PDF
Chat
|
Techniques for approaching the dual Ramsey property in the projective hierarchy
|
2001
|
Lorenz Halbeisen
Benedikt Löwe
|
|
+
PDF
Chat
|
Relations Between Some Cardinals in the Absence of the Axiom of Choice
|
2001
|
Lorenz Halbeısen
Saharon Shelah
|
|
+
PDF
Chat
|
On the complexity of Hamel bases of infinite-dimensional Banach spaces
|
2001
|
Lorenz Halbeısen
|
|
+
|
Ultrafilter spaces on the semilattice of partitions
|
2001
|
Lorenz Halbeisen
Benedikt Loewe
|
|
+
|
On a theorem of Banach and Kuratowski and K-Lusin sets
|
2001
|
Tomek Bartoszyński
Lorenz Halbeısen
|
|
+
|
Symmetries between two Ramsey properties
|
2001
|
Lorenz Halbeisen
|
|
+
|
On asymptotic models in Banach spaces
|
2001
|
Lorenz Halbeısen
Edward Odell
|
|
+
|
Techniques for approaching the dual Ramsey property in the projective hierarchy
|
2001
|
Lorenz Halbeisen
Benedikt Loewe
|
|
+
|
On shattering, splitting and reaping partitions
|
2001
|
Lorenz Halbeısen
|
|
+
|
On the complexity of Hamel bases of infinite dimensional Banach spaces
|
2001
|
Lorenz Halbeısen
|
|
+
PDF
Chat
|
Ramseyan ultrafilters
|
2001
|
Lorenz Halbeısen
|
|
+
|
Ramseyan ultrafilters
|
2001
|
Lorenz Halbeisen
|
|
+
PDF
Chat
|
An Application of van der Waerden's Theorem in Additive Number Theory
|
2000
|
Lorenz Halbeısen
Norbert Hungerbühler
|
|
+
|
Reconstruction of Weighted Graphs by their Spectrum
|
2000
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Lorenz Halbeısen
Norbert Hungerbühler
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On Periodic Billiard Trajectories in Obtuse Triangles
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2000
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Lorenz Halbeisen
Norbert Hungerbühler
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Relations between some cardinals in the absence of the Axiom of Choice
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2000
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Lorenz Halbeısen
Saharon Shelah
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ON GENERALIZED CARMICHAEL NUMBERS
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2000
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Lorenz Halbeisen
Norbert Hungerb
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PDF
Chat
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�ber das Mischen von Spielkarten, ein mathematisches Men�
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1999
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Stephanie Gloor
Lorenz Halbeısen
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PDF
Chat
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Powers and Polynomials in ${\Bbb Z}_m$
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1999
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Lorenz Halbeısen
Norbert Hungerbühler
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Generation of isospectral graphs
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1999
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Lorenz Halbeısen
Norbert Hungerbühler
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Generation of isospectral graphs
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1999
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Lorenz Halbeısen
Norbert Hungerb�hler
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Generation of isospectral graphs
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1999
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Lorenz Halbeısen
Norbert Hungerbühler
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PDF
Chat
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On generalised Carmichael numbers.
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1999
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Lorenz Halbeisen
Norbert Hungerbühler
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PDF
Chat
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Symmetries between two Ramsey properties
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1998
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Lorenz Halbeısen
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Packings in Complete Graphs.
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1998
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Lorenz Halbeisen
Norbert Hungerbühler
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PDF
Chat
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On Shattering, Splitting and Reaping Partitions
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1998
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Lorenz Halbeısen
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PDF
Chat
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Optimal bounds for the length of rational Collatz cycles
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1997
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Lorenz Halbeisen
Norbert Hungerbühler
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PDF
Chat
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Mathias absoluteness and the Ramsey property
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1996
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Lorenz Halbeısen
Haim Judah
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PDF
Chat
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Consequences of arithmetic for set theory
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1994
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Lorenz Halbeisen
Saharon Shelah
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Ramsey properties of reals and partitions
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1994
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Lorenz Halbeisen
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Consequences of arithmetic for set theory
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1993
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Lorenz Halbeisen
Saharon Shelah
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Consequences of arithmetic for set theory
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1993
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Lorenz Halbeisen
Saharon Shelah
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