Willem A. de Graaf - researchr alias

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2025

Computing component groups of stabilizers of nilpotent orbit representativesEmanuele Di Bella, Willem A. de Graaf. JSC, 129:102404, 2025. [doi]

SL (2,ℝ) -Actions on Homogeneous SpacesMaciej Bochenski, Willem A. de Graaf, Piotr Jastrzebski, Aleksy Tralle. em, 34(2):307-315, April 2025. [doi]

2024

A computational approach to almost-inner derivationsHeiko Dietrich, Willem A. de Graaf. JSC, 125:102312, 2024. [doi]

2021

A constructive method for decomposing real representationsSajid Ali, Hassan Azad, Indranil Biswas, Willem A. de Graaf. JSC, 104:328-342, 2021. [doi]

Computing the real Weyl groupHeiko Dietrich, Willem A. de Graaf. JSC, 104:1-14, 2021. [doi]

2018

Classification of nilpotent associative algebras of small dimensionWillem A. de Graaf. ijac, 28(1):133-162, 2018. [doi]

2015

Orbit Closures of Linear Algebraic GroupsWillem A. de Graaf. In Jaime Gutierrez, Josef Schicho, Martin Weimann, editors, Computer Algebra and Polynomials - Applications of Algebra and Number Theory. Volume 8942 of Lecture Notes in Computer Science, pages 76-93, Springer, 2015. [doi]

2014

Classifying semisimple orbits of η-groupsWillem A. de Graaf, Francesco Oriente. moc, 83(289):2509-2526, 2014. [doi]

A GAP Package for Computing with Real Semisimple Lie AlgebrasHeiko Dietrich, Paolo Faccin, Willem A. de Graaf. icms 2014: 59-66 [doi]

2013

Classification of Novikov algebrasDietrich Burde, Willem A. de Graaf. aaecc, 24(1):1-15, 2013. [doi]

Computing with real Lie algebras: Real forms, Cartan decompositions, and Cartan subalgebrasHeiko Dietrich, Paolo Faccin, Willem A. de Graaf. JSC, 56:27-45, 2013. [doi]

2011

Computing representatives of nilpotent orbits of θ-groupsWillem A. de Graaf. JSC, 46(4):438-458, 2011. [doi]

2009

Non-associative Gröbner bases, finitely-presented Lie rings and the Engel condition, IISerena Cicalò, Willem A. de Graaf. JSC, 44(7):786-800, 2009. [doi]

Constructing algebraic groups from their Lie algebrasWillem A. de Graaf. JSC, 44(9):1223-1233, 2009. [doi]

Parametrizing Del Pezzo surfaces of degree 8 using Lie algebrasWillem A. de Graaf, Jana Pílniková, Josef Schicho. JSC, 44(1):1-14, 2009. [doi]

2008

Computing with Nilpotent Orbits in Simple Lie Algebras of Exceptional TypeWillem A. de Graaf. lmsjcm, 11:280-297, 2008. [doi]

2007

Secant Dimensions of Minimal Orbits: Computations and ConjecturesKarin Baur, Jan Draisma, Willem A. de Graaf. em, 16(2):239-250, 2007. [doi]

Non-associative gröbner bases, finitely-presented lie rings and the engel conditionSerena Cicalò, Willem A. de Graaf. issac 2007: 100-107 [doi]

Finding Integral Linear Dependencies of Algebraic Numbers and Algebraic Lie AlgebrasClaus Fieker, Willem A. de Graaf. lmsjcm, 10:271-287, 2007. [doi]

2005

Classification of Solvable Lie AlgebrasWillem A. de Graaf. em, 14(1):15-25, 2005. [doi]

2003

An Algorithm to Compute the Canonical Basis of an Irreducible Module Over a Quantized Enveloping AlgebraWillem A. de Graaf. lmsjcm, 6:105-118, 2003. [doi]

2002

Constructing Canonical Bases of Quantized Enveloping AlgebrasWillem A. de Graaf. em, 11(2):161-170, 2002. [doi]

Constructing Faithful Representations of Finitely-generated Torsion-free Nilpotent GroupsWillem A. de Graaf, Werner Nickel. JSC, 33(1):31-41, 2002. [doi]

2001

Computing with Quantized Enveloping Algebras: PBW-Type Bases, Highest-Weight Modules and R-MatricesWillem A. de Graaf. JSC, 32(5):475-490, 2001.

1999

Constructing Bases of Finitely Presented Lie Algebras Using Gröbner Bases in Free AlgebrasWillem A. de Graaf, J. Wisliceny. issac 1999: 37-43 [doi]

1997

Computations in finite-dimensional Lie algebrasArjeh M. Cohen, Willem A. de Graaf, Lajos Rónyai. dmtcs, 1(2):129-138, 1997. [doi]

Constructing Faithful Matrix Representations of Lie AlgebrasWillem A. de Graaf. issac 1997: 54-59

Computing Levi Decompositions in Lie algebrasWillem A. de Graaf, Gábor Ivanyos, A. Küronya, Lajos Rónyai. aaecc, 8(4):291-303, 1997. [doi]

An Algorithm for the Decomposition of Semisimple Lie AlgebrasWillem A. de Graaf. TCS, 187(1-2):117-122, 1997. [doi]

1996

Computing Cartan Subalgebras of Lie AlgebrasWillem A. de Graaf, Gábor Ivanyos, Lajos Rónyai. aaecc, 7(5):339-349, 1996. [doi]

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