Félix Ulmer

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All published works

Action	Title	Year	Authors
+	A Gröbner Approach to Dual-Containing Cyclic Left Module $(θ,δ)$-Codes $Rg/Rf\subset R/Rf$ over Finite Commutative Frobenius Rings	2023	Hedongliang Liu Cornelia Ott Félix Ulmer
+ PDF Chat	Skew Reed-Muller codes	2019	Willi Geiselmann Félix Ulmer
+ PDF Chat	Duality preserving Gray maps for codes over rings	2016	Steve Szabo Félix Ulmer
+	Dualilty Preserving Gray Maps: (Pseudo) Self-dual Bases and Symmetric Bases	2015	Steve Szabo Félix Ulmer
+	Duality Preserving Gray Maps for Codes over Rings	2015	Steve Szabo Félix Ulmer
+	Extended Abstract: Codes as Modules over Skew Polynomial Rings	2015	Félix Ulmer
+	Duality Preserving Gray Maps for Codes over Rings	2015	Steve Szabo Félix Ulmer
+	Self-dual skew codes and factorization of skew polynomials	2013	Delphine Boucher Félix Ulmer
+ PDF Chat	Linear codes using skew polynomials with automorphisms and derivations	2012	Delphine Boucher Félix Ulmer
+	Théorie des groupes : cours et exercices	2012	Félix Ulmer
+ PDF Chat	Codes as Modules over Skew Polynomial Rings	2009	Delphine Boucher Félix Ulmer
+	Some methods to solve linear differential equations in closed form	2009	Félix Ulmer Jacques-Arthur Weil
+ PDF Chat	Codes as modules over skew polynomial rings	2009	Delphine Boucher Félix Ulmer
+ PDF Chat	The Lamé family of connections on the projective line	2008	Frank Loray Marius van der Put Félix Ulmer
+	Coding with skew polynomial rings	2008	Delphine Boucher Félix Ulmer
+ PDF Chat	Skew codes of prescribed distance or rank	2008	Lionel Chaussade Pierre Loidreau Félix Ulmer
+ PDF Chat	Skew constacyclic codes over Galois rings	2008	Delphine Boucher Patrick Solé Félix Ulmer
+ PDF Chat	Skew-cyclic codes	2007	Delphine Boucher Willi Geiselmann Félix Ulmer
+	Skew-cyclic codes	2006	Delphine Boucher Willi Geiselmann Félix Ulmer
+	Skew-cyclic codes	2006	Delphine Boucher Willi Geiselmann Félix Ulmer
+	Note on algebraic solutions of differential equations with known finite Galois group	2005	Félix Ulmer
+	Fourth order linear differential equations with imprimitive group	2003	Delphine Boucher Philippe Gaillard Félix Ulmer
+	Liouvillian solutions of third order differential equations	2003	Félix Ulmer
+	Linear Differential Operators for Polynomial Equations	2002	Olivier Cormier Michael F. Singer Barry Trager Félix Ulmer
+	Computing the Galois group of a polynomial using linear differential equations	2000	Olivier Cormier Michael F. Singer Félix Ulmer
+	Differential Equations and Finite Groups	2000	Marius van der Put Félix Ulmer
+	How to solve linear differential equations: An outline	2000	Félix Ulmer
+	Liouvillian Solutions of Linear Differential Equations of Order Three and Higher	1999	Mark van Hoeij Jean-François Ragot Félix Ulmer Jacques-Arthur Weil
+	Constructing a third-order linear differential equation	1997	Willi Geiselman Félix Ulmer
+	Linear differential equations and products of linear forms	1997	Michael F. Singer Félix Ulmer
+	Irreducible Linear Differential Equations of Prime Order	1994	Félix Ulmer
+	Liouvillian and Algebraic Solutions of Second and Third Order Linear Differential Equations	1993	Michael F. Singer Félix Ulmer
+	On liouvillian solutions of linear differential equations	1992	Félix Ulmer
+	Liouvillian solutions of third order linear differential equations	1992	Michael F. Singer Félix Ulmer
+	On algebraic solutions of linear differential equations with primitive unimodular Galois group	1991	Félix Ulmer

Common Coauthors

Coauthor	Papers Together
Delphine Boucher	10
Michael F. Singer	5
Steve Szabo	4
Willi Geiselmann	4
Olivier Cormier	2
Marius van der Put	2
Jacques-Arthur Weil	2
Cornelia Ott	1
Lionel Chaussade	1
Hedongliang Liu	1
Philippe Gaillard	1
Jean-François Ragot	1
Barry Trager	1
Pierre Loidreau	1
Patrick Solé	1
Willi Geiselman	1
Frank Loray	1
Mark van Hoeij	1

Commonly Cited References

Action	Title	Year	Authors	# of times referenced
+	An algorithm for solving second order linear homogeneous differential equations	1986	J. Kovacic	10
+	Liouvillian and Algebraic Solutions of Second and Third Order Linear Differential Equations	1993	Michael F. Singer Félix Ulmer	9
+	Theory of Non-Commutative Polynomials	1933	Öystein Ore	8
+	The Magma Algebra System I: The User Language	1997	Wieb Bosma John Cannon Catherine Playoust	7
+	Testing reducibility of linear differential operators: A group theoretic perspective	1996	Michael F. Singer	6
+	Finite Rings With Identity	1974	Bernard R. McDonald	6
+	Schur-Cohn Sub-transforms of a Polynomial	1993	M.Ph.Saux Picart	6
+	An algorithm for computing invariants of differential Galois groups	1997	Mark van Hoeij Jacques-Arthur Weil	5
+	Coding with skew polynomial rings	2008	Delphine Boucher Félix Ulmer	5
+	An introduction to differential algebra	1957	Irving Kaplansky	5
+ PDF Chat	Skew-cyclic codes	2007	Delphine Boucher Willi Geiselmann Félix Ulmer	5
+	Liouvillian Solutions of Linear Differential Equations of Order Three and Higher	1999	Mark van Hoeij Jean-François Ragot Félix Ulmer Jacques-Arthur Weil	5
+	On solutions of linear ordinary differential equations in their coefficient field	1992	Manuel Bronstein	5
+	Liouvillian Solutions of n-th Order Homogeneous Linear Differential Equations	1981	Michael F. Singer	5
+	Linear differential equations and products of linear forms	1997	Michael F. Singer Félix Ulmer	4
+	Factorization of Differential Operators with Rational Functions Coefficients	1997	Mark van Hoeij	4
+	Differential Equations and Finite Groups	2000	Marius van der Put Félix Ulmer	4
+	The Theory of Rings	1943	Nathan Jacobson	4
+	On Solutions of Linear Ordinary Difference Equations in their Coefficient Field	2000	Manuel Bronstein	4
+ PDF Chat	Skew constacyclic codes over Galois rings	2008	Delphine Boucher Patrick Solé Félix Ulmer	4
+	Liouvillian Solutions of Linear Differential Equations with Liouvillian Coefficients	1991	Michael F. Singer	3
+	On Second Order Linear Differential Equations with Algebraic Solutions	1979	F. Baldassari Bernard Dwork	3
+ PDF Chat	On Transitive Permutation Groups	1998	John H. Conway Alexander Hulpke John McKay	3
+ PDF Chat	Codes as Modules over Skew Polynomial Rings	2009	Delphine Boucher Félix Ulmer	3
+ PDF Chat	On a special class of polynomials	1933	Öystein Ore	3
+	The structure of linear groups	1971	John D. Dixon	3
+	Irreducible Linear Differential Equations of Prime Order	1994	Félix Ulmer	3
+	An Introduction to Rings and Modules	2000	A. J. Berrick M. E. Keating	3
+	On liouvillian solutions of linear differential equations	1992	Félix Ulmer	3
+	Galois Action on Solutions of a Differential Equation	1995	Petra Hendriks Marius van der Put	3
+	Computer Algebra and Differential Equations	1994	Evelyne Tournier	3
+	An introduction to rings and modules with K-theory in view	2000	A. J. Berrick M. E. Keating	3
+	Solving Homogeneous Linear Differential Equations in Terms of Second Order Linear Differential Equations	1985	Michael F. Singer	2
+	Algebra: 117-118	1900	G. B. M. Zerr Frederic R. Honey	2
+	Encyclopedia of Mathematics and its Applications.	1982	Y. L. L. William B. Jones W. J. Thron	2
+ PDF Chat	Integration of Algebraic Functions	2022	Barry Trager	2
+	On ore rings, linear operators and factorisation	1993	Marko PetkovÅ¡ek Manuel Bronstein	2
+	Linear Differential Operators for Polynomial Equations	2002	Olivier Cormier Michael F. Singer Barry Trager Félix Ulmer	2
+	Algebraic Matric Groups and the Picard-Vessiot Theory of Homogeneous Linear Ordinary Differential Equations	1948	E. R. Kolchin	2
+	Mémoire sur les équations différentielles linéaires à intégrale algébrique	1878	M. Camille Jordan	2
+ PDF Chat	A linear construction for certain Kerdock and Preparata codes	1993	A.R. Calderbank A. Roger Hammons P. Vijay Kumar N. J. A. Sloane Patrick Solé	2
+ PDF Chat	Skew codes of prescribed distance or rank	2008	Lionel Chaussade Pierre Loidreau Félix Ulmer	2
+	Lectures on Differential Galois Theory	1994	Andy R. Magid	2
+	Free Rings and Their Relations.	1973	David J. Fieldhouse P. M. Cohn	2
+ PDF Chat	Ueber einige besondere homogene lineare Differentialgleichungen	1886	Adolf Hurwitz	2
+	Type II codes over F2m+uF2m	2003	Koichi Betsumiya San Ling Fidel R. Nemenzo	2
+ PDF Chat	Duality for modules over finite rings and applications to coding theory	1999	Jay A. Wood	2
+	Cyclic codes over finite rings	1997	Marcus Greferath	2
+	Vandermonde and Wronskian matrices over division rings	1988	T. Y. Lam André Leroy	2
+ PDF Chat	Character theory of finite groups	1999	I. M. Isaacs	2