Douglas Ulrich

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All published works

Action	Title	Year	Authors
+ PDF Chat	Characterizing the existence of a Borel complete expansion	2023	M. Laskowski Douglas Ulrich
+	A proof of the Borel completeness of torsion free abelian groups	2022	M. Laskowski Douglas Ulrich
+ PDF Chat	MOST(?) THEORIES HAVE BOREL COMPLETE REDUCTS	2021	M. Laskowski Douglas Ulrich
+	Most(?) theories have Borel complete reducts.	2021	M. Laskowski Douglas Ulrich
+	Most(?) theories have Borel complete reducts	2021	M. Laskowski Douglas Ulrich
+	Characterizing the existence of a Borel complete expansion	2021	M. Laskowski Douglas Ulrich
+	Torsion-free abelian groups are consistently $ {\rm a}\Delta ^1_2$-complete	2019	Saharon Shelah Douglas Ulrich
+	Pseudosaturation and the Interpretability Orders.	2018	Douglas Ulrich
+	Cardinal Characteristics of Models of Set Theory	2018	Douglas Ulrich
+	Keisler's Order and Full Boolean-Valued Models	2018	Douglas Ulrich
+ PDF Chat	Distinct volume subsets via indiscernibles	2018	William Gasarch Douglas Ulrich
+	Distinct Volume Subsets via Indiscernibles	2018	William Gasarch Douglas Ulrich
+ PDF Chat	KEISLER’S ORDER IS NOT LINEAR, ASSUMING A SUPERCOMPACT	2018	Douglas Ulrich
+	Torsion-Free Abelian Groups are Consistently $a \Delta^1_2$-complete	2018	Saharon Shelah Douglas Ulrich
+ PDF Chat	THE NUMBER OF ATOMIC MODELS OF UNCOUNTABLE THEORIES	2018	Douglas Ulrich
+	$\leq_{SP}$ Can Have Infinitely Many Classes	2018	Saharon Shelah Douglas Ulrich
+	A Streamlined Proof of $\mathfrak{p}=\mathfrak{t}$	2018	Douglas Ulrich
+	Pseudosaturation and the Interpretability Orders	2018	Douglas Ulrich
+	Cardinal Characteristics of Models of Set Theory	2018	Douglas Ulrich
+	Keisler's Order and Full Boolean-Valued Models	2018	Douglas Ulrich
+	Distinct Volume Subsets via Indiscernibles	2018	William Gasarch Douglas Ulrich
+	Torsion-Free Abelian Groups are Consistently $a Δ^1_2$-complete	2018	Saharon Shelah Douglas Ulrich
+	Keisler's Order is Not Linear, Assuming a Supercompact	2017	Douglas Ulrich
+	Low is a Dividing Line in Keisler's Order	2017	Douglas Ulrich
+ PDF Chat	Borel complexity and potential canonical Scott sentences	2017	Douglas Ulrich Richard Rast M. Laskowski
+	Keisler's Order is Not Linear, Assuming a Supercompact	2017	Douglas Ulrich
+	The Number of Atomic Models of Uncountable Theories	2016	Douglas Ulrich
+	The Number of Atomic Models of Uncountable Theories	2016	Douglas Ulrich
+	A New Notion of Cardinality for Countable First Order Theories	2015	Douglas Ulrich Richard Rast M. Laskowski
+	Borel Complexity and Potential Canonical Scott Sentences	2015	Douglas Ulrich Richard Rast M. Laskowski
+	Distinct Volume Subsets	2015	David Conlon Jacob Fox William Gasarch David G. Harris Douglas Ulrich Samuel Zbarsky
+ PDF Chat	Distinct Volume Subsets	2015	David Conlon Jacob Fox William Gasarch David G. Harris Douglas Ulrich Samuel Zbarsky
+	Borel Complexity and Potential Canonical Scott Sentences	2015	Douglas Ulrich Richard Rast M. Laskowski
+	NIM with Cash	2015	William Gasarch John Purtilo Douglas Ulrich
+	Distinct volume subsets	2014	David Conlon Jacob Fox William Gasarch David G. Harris Douglas Ulrich Samuel Zbarsky
+	Distinct volume subsets	2014	David Conlon Jacob Fox William Gasarch David G. Harris Douglas Ulrich Samuel Zbarsky

Common Coauthors

Coauthor	Papers Together
M. Laskowski	10
William Gasarch	8
David Conlon	4
Jacob Fox	4
David G. Harris	4
Samuel Zbarsky	4
Saharon Shelah	4
Richard Rast	3
Richard Rast	1
John Purtilo	1

Commonly Cited References

Action	Title	Year	Authors	# of times referenced
+ PDF Chat	A dividing line within simple unstable theories	2013	M. Malliaris Saharon Shelah	6
+	The number of types in simple theories	1999	Enrique Casanovas	5
+	Lascar strong types in some simple theories	1999	Steven Buechler	5
+	A Borel reductibility theory for classes of countable structures	1989	Harvey M. Friedman Lee Stanley	5
+	Ultraproducts which are not saturated	1967	H. Jerome Keisler	5
+	Existence of optimal ultrafilters and the fundamental complexity of simple theories	2016	M. Malliaris Saharon Shelah	5
+	Invariant Descriptive Set Theory	2008	Su Gao	4
+ PDF Chat	What is the theory without power set?	2016	Victoria Gitman Joel David Hamkins Thomas A. Johnstone	3
+ PDF Chat	Borel complexity and potential canonical Scott sentences	2017	Douglas Ulrich Richard Rast M. Laskowski	3
+ PDF Chat	Keisler’s order has infinitely many classes	2018	M. Malliaris Saharon Shelah	3
+ PDF Chat	Some remarks on set theory	1950	Péter L. Erdős	3
+	Constructing regular ultrafilters from a model-theoretic point of view	2015	M. Malliaris Saharon Shelah	3
+ PDF Chat	Mutually algebraic structures and expansions by predicates	2013	M. Laskowski	3
+	Realization of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" display="inline" overflow="scroll"><mml:mi>φ</mml:mi></mml:math>-types and Keisler’s order	2008	M. Malliaris	3
+	A weak version of ◊ which follows from 2ℵ 0<2ℵ 1	1978	Keith Devlin Saharon Shelah	2
+ PDF Chat	On the Number of Tetrahedra with Minimum, Unit, and Distinct Volumes in Three-Space	2007	Adrian Dumitrescu Csaba D. Tóth	2
+	The complexity of isomorphism for complete theories of linear orders with unary predicates	2017	Richard Rast	2
+	The Minimum Number of Distinct Areas of Triangles Determined by a Set of <i>n</i> Points in the Plane	2008	Rom Pinchasi	2
+	Distinct Triangle Areas in a Planar Point Set	2007	Adrian Dumitrescu Csaba D. Tóth	2
+	Linear problems in combinatorial number theory	1975	János Komlós M. Sulyok Endre Szemerédi	2
+ PDF Chat	MODEL-THEORETIC PROPERTIES OF ULTRAFILTERS BUILT BY INDEPENDENT FAMILIES OF FUNCTIONS	2014	M. Malliaris Saharon Shelah	2
+	Keisler's Order and Full Boolean-Valued Models	2018	Douglas Ulrich	2
+	Pseudosaturation and the Interpretability Orders.	2018	Douglas Ulrich	2
+	Persistence and Regularity in Unstable Model Theory	2009	M. Malliaris	2
+	On a problem in combinatorial geometry	1982	Paul Erdős George Purdy E. G. Straus	2
+	Near optimal bounds for the Erdős distinct distances problem in high dimensions	2008	József Solymosi Van H. Vu	2
+	On Sets of Distances of <i>n</i> Points	1970	P. Erdős	2
+	Keisler's order has infinitely many classes	2015	M. Malliaris Saharon Shelah	2
+	A new look at interpretability and saturation	2017	M. Malliaris Saharon Shelah	2
+	Toward classifying unstable theories	1996	Saharon Shelah	2
+	On the existence of atomic models	1993	M. Laskowski Saharon Shelah	2
+ PDF Chat	A note on distinct distance subsets	2013	Marcos Charalambides	2
+	Prime and atomic models	1978	Julia F. Knight	2
+	Well-founded Boolean ultrapowers as large cardinal embeddings	2012	Joel David Hamkins Daniel Evan Seabold	2
+ PDF Chat	Some theorems of set theory and their topological consequences	1965	R. Engelking M. Karłowicz	2
+	Classification theory for non-elementary classes I: The number of uncountable models ofψ ∈L ω_1, ω. Part A	1983	Saharon Shelah	2
+ PDF Chat	Some extremal problems in geometry	1971	P. Erdős George Purdy	2
+ PDF Chat	Borel completeness of some ℵ<sub>0</sub>-stable theories	2015	M. Laskowski Saharon Shelah	2
+	The Directions Determined by <i>n</i> Points in the Plane	1979	G. R. Burton George Purdy	2
+	Notions around tree property 1	2011	Byunghan Kim Hyeung-Joon Kim	2
+	Proper and Improper Forcing	1998	Saharon Shelah	2
+ PDF Chat	Hypergraph sequences as a tool for saturation of ultrapowers	2012	M. Malliaris	2
+ PDF Chat	Extremal problems on triangle areas in two and three dimensions	2009	Adrian Dumitrescu Micha Sharir Csaba D. Tóth	2
+	Whitehead groups may not be free even assuming ch, II	1980	Saharon Shelah	2
+ PDF Chat	Ultrafilters and independent sets	1972	Kenneth Kunen	1
+ PDF Chat	A Supersimple Nonlow Theory	1998	Enrique Casanovas Byunghan Kim	1
+	On the Erdos distinct distance problem in the plane	2010	Larry Guth Nets Hawk Katz	1
+	The Schroder-Bernstein property for theories of abelian groups	2007	John Goodrick	1
+	Every two elementarily equivalent models have isomorphic ultrapowers	1971	Saharon Shelah	1
+	A complicated <i>ω</i>-stable depth 2 theory	2011	Martin Koerwien	1