Works (59)

Updated: August 8th, 2024 05:12

2024 journal article

A construction of solutions of an integrable deformation of a commutative Lie algebra of skew hermitian Z×Z-matrices

Indagationes Mathematicae.

Source: ORCID
Added: August 8, 2024

2020 journal article

Classifying the orbits of the generalized symmetric spaces for

Communications in Algebra, 48(4), 1744–1757.

Source: ORCID
Added: August 8, 2024

2020 journal article

Extended symmetric spaces and θ-twisted involution graphs

Communications in Algebra, 48(6), 2293–2306.

By: J. Collins*, R. Haas*, A. Helminck*, J. Lenarz*, K. Pelatt*, S. Saccon*, M. Welz*

Contributors: J. Collins*, R. Haas*, A. Helminck*, J. Lenarz*, K. Pelatt*, S. Saccon*, M. Welz*

Source: ORCID
Added: August 8, 2024

2018 journal article

On the structure of generalized symmetric spaces of SL<inf>2</inf>(F<inf>q</inf>) and GL<inf>2</inf>(F<inf>q</inf>)

Note Di Matematica, 37(2), 1–10.

By: C. Buell, A. Helminck*, V. Klima, J. Schaefer, C. Wright & E. Ziliak

Contributors: C. Buell, A. Helminck*, V. Klima, J. Schaefer, C. Wright & E. Ziliak

Source: ORCID
Added: August 8, 2024

2016 journal article

Erratum of "Isomorphy classes of involutions of SP(2n, k), n &gt; 2"

Journal of Lie Theory, 26(1), 293–295. http://www.scopus.com/inward/record.url?eid=2-s2.0-84955487887&partnerID=MN8TOARS

By: R. Benim, A. Helminck & F. Ward

Contributors: R. Benim, A. Helminck & F. Ward

Source: ORCID
Added: August 8, 2024

2016 journal article

Isomorphy classes of involutions of SO(n, k, beta), n > 2

Isomorphy classes of involutions of SO(n, k, beta), n > 2. Journal of Lie Theory, 26(2), 383–438.

By: R. Benim, C. Dometrius, A. Helminck & L. Wu

Source: NC State University Libraries
Added: August 6, 2018

2016 journal article

Isomorphy classes of involutions of SO(n, κ, β), n &gt; 2

Journal of Lie Theory, 26(2), 383–438. http://www.scopus.com/inward/record.url?eid=2-s2.0-84983329156&partnerID=MN8TOARS

By: R. Benim, C. Dometrius, A. Helminck & L. Wu

Contributors: R. Benim, C. Dometrius, A. Helminck & L. Wu

Source: ORCID
Added: August 8, 2024

2016 article

Isomorphy classes of involutions of SP(2n, k), n > 2 (vol 25, pg 903, 2015)

Isomorphy classes of involutions of SP(2n, k), n > 2 (vol 25, pg 903, 2015). Journal of Lie Theory, Vol. 26, pp. 293–295.

By: R. Benim, A. Helminck & F. Ward

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Isomorphy classes of involutions of SP(2n, k), n &gt; 2

Journal of Lie Theory, 25(4), 903–947. http://www.scopus.com/inward/record.url?eid=2-s2.0-84929886770&partnerID=MN8TOARS

By: R. Benim, A. Helminck & F. Ward

Contributors: R. Benim, A. Helminck & F. Ward

Source: ORCID
Added: August 8, 2024

2014 journal article

Cauchy problems related to integrable deformations of pseudo differential operators

JOURNAL OF GEOMETRY AND PHYSICS, 85, 196–205.

By: G. Helminck*, A. Helminck n & E. Panasenko

Contributors: G. Helminck*, A. Helminck n & E. Panasenko

author keywords: Cauchy problem; Integrable deformation; Pseudo differential operators; (Strict) KP hierarchy; Zero curvature relations
UN Sustainable Development Goal Categories
14. Life Below Water (Web of Science)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2014 journal article

Infinite dimensional symmetric spaces and Lax equations compatible with the infinite Toda chain

JOURNAL OF GEOMETRY AND PHYSICS, 85, 60–74.

By: G. Helminck* & A. Helminck n

Contributors: G. Helminck* & A. Helminck n

author keywords: Lower triangular Z x Z-matrices; Lax equations; Zero curvature form; Linearization; Wave matrices
UN Sustainable Development Goal Categories
14. Life Below Water (Web of Science)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2014 journal article

On the structure of involutions and symmetric spaces of dihedral groups

Note Di Matematica, 34(2), 23–40.

By: K. Cunningham, T. Edgar, A. Helminck, B. Jones, H. Oh, R. Schwell, J. Vasquez

Contributors: K. Cunningham, T. Edgar, A. Helminck, B. Jones, H. Oh, R. Schwell, J. Vasquez

Source: ORCID
Added: August 8, 2024

2013 journal article

Integrable deformations in the algebra of pseudodifferential operators from a Lie algebraic perspective

THEORETICAL AND MATHEMATICAL PHYSICS, 174(1), 134–153.

By: G. Helminck*, A. Helminck n & E. Panasenko

Contributors: G. Helminck*, A. Helminck n & E. Panasenko

author keywords: integrable deformation; pseudodifferential operator; Lax equation; Kadomtsev-Petviashvili hierarchy; zero-curvature relation; linearization
UN Sustainable Development Goal Categories
14. Life Below Water (Web of Science)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2012 article

Algorithms for Twisted Involutions in Weyl Groups

Haas, R., & Helminck, A. G. (2012, June). ALGEBRA COLLOQUIUM, Vol. 19, pp. 263–282.

By: R. Haas* & A. Helminck n

Contributors: R. Haas* & A. Helminck n

author keywords: symmetric spaces; symbolic computation
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2012 journal article

Permutation notations for the exceptional Weyl groupF4

Involve, a Journal of Mathematics, 5(1), 81–89.

By: P. Cahn*, R. Haas*, A. Helminck n, J. Li* & J. Schwartz*

Source: ORCID
Added: August 8, 2024

2011 journal article

Admissible Sequences for Twisted Involutions in Weyl Groups

CANADIAN MATHEMATICAL BULLETIN-BULLETIN CANADIEN DE MATHEMATIQUES, 54(4), 663–675.

By: R. Haas* & A. Helminck n

Contributors: R. Haas* & A. Helminck n

Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2011 journal article

Dedication to Gerardus F. Helminck

Journal of Geometry and Physics, 61(9), 1631.

By: A. Helminck*, J. Krasil’shchik & V. Rubtsov

Contributors: A. Helminck*, J. Krasil'shchik & V. Rubtsov

Source: ORCID
Added: August 8, 2024

2011 journal article

Editors' preface for the topical issue on "The interface between integrability and quantization"

Journal of Geometry and Physics, 61(9), 1632.

By: A. Helminck*, J. Krasil’shchik & V. Rubtsov*

Contributors: A. Helminck*, J. Krasil'shchik & V. Rubtsov*

Source: ORCID
Added: August 8, 2024

2011 journal article

Equivalent forms of multi component Toda hierarchies

JOURNAL OF GEOMETRY AND PHYSICS, 61(4), 847–873.

By: G. Helminck*, A. Helminck n & A. Opimakh

Contributors: G. Helminck*, A. Helminck n & A. Opimakh

author keywords: Lower and upper triangular Z x Z-matrices; Infinite dimensional Cauchy problem; Lax equations; Zero curvature form; Bilinear form
UN Sustainable Development Goal Categories
14. Life Below Water (Web of Science)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2011 article

Equivalent forms of multi component Toda hierarchies (Reprinted from JOURNAL OF GEOMETRY AND PHYSICS, vol 61, pg 847, 2011)

Helminck, G. F., Helminck, A. G., & Opimakh, A. V. (2011, September). JOURNAL OF GEOMETRY AND PHYSICS, Vol. 61, pp. 1755–1781.

By: G. Helminck*, A. Helminck n & A. Opimakh

Contributors: G. Helminck*, A. Helminck n & A. Opimakh

author keywords: Lower and upper triangular Z x Z-matrices; Infinite dimensional Cauchy problem; Lax equations; Zero curvature form; Bilinear form
UN Sustainable Development Goal Categories
14. Life Below Water (Web of Science)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2011 journal article

On generalized Cartan subspaces

TRANSFORMATION GROUPS, 16(3), 783–805.

By: A. Helminck n & G. Schwarz*

Contributors: A. Helminck n & G. Schwarz*

Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2010 journal article

THE RELATIVE FRAME BUNDLE OF AN INFINITE-DIMENSIONAL FLAG VARIETY AND SOLUTIONS OF INTEGRABLE HIERARCHIES

THEORETICAL AND MATHEMATICAL PHYSICS, 165(3), 1610–1636.

By: G. Helminck*, A. Helminck n & A. Opimakh*

Contributors: G. Helminck*, A. Helminck n & A. Opimakh*

author keywords: upper-triangular Z x Z matrices; Lax equations; zero curvature form
UN Sustainable Development Goal Categories
14. Life Below Water (Web of Science)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2009 article

On Orbit Decompositions for Symmetric k-Varieties

SYMMETRY AND SPACES, Vol. 278, pp. 83–127.

By: A. Helminck n

Contributors: A. Helminck n

author keywords: Symmetric spaces; symmetric varieties; involutions of algebraic groups
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2009 journal article

On the Classification of Orbits of Symmetric Subgroups Acting on Flag Varieties of SL(2, k)

COMMUNICATIONS IN ALGEBRA, 37(4), 1334–1352.

By: S. Beun n & A. Helminck n

Contributors: S. Beun n & A. Helminck n

author keywords: k-split tori; Minimal parabolic subgroups; p-adic numbers; Symmetric k-varieties; Symmetric spaces
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2009 journal article

Real double coset spaces and their invariants

JOURNAL OF ALGEBRA, 322(1), 219–236.

By: A. Helminck n & G. Schwarz*

Contributors: A. Helminck n & G. Schwarz*

author keywords: Symmetric spaces; Symmetric varieties; Cartan subspaces
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2008 journal article

Algorithms for computations in local symmetric spaces

COMMUNICATIONS IN ALGEBRA, 36(5), 1758–1788.

By: J. Daniel* & A. Helminck n

Contributors: J. Daniel* & A. Helminck n

author keywords: Lie algebras of linear algebraic groups; symmetric spaces
TL;DR: This article lays the groundwork for computing the fine structure of symmetric spaces over the real numbers and other base fields, gives a complete set of algorithms for computing this structure and uses this to compute nice bases for the local symmetric varieties. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2007 article

Algorithms for computing characters for symmetric spaces

Gagliardi, D., & Helminck, A. G. (2007, December). ACTA APPLICANDAE MATHEMATICAE, Vol. 99, pp. 339–365.

By: D. Gagliardi* & A. Helminck n

Contributors: D. Gagliardi* & A. Helminck n

author keywords: symmetric spaces; Lie algebras of linear algebraic groups
TL;DR: This paper considers the case that k is algebraically closed and gives explicit algorithmic formulas for expressing the characters of the weight lattice $\Lambda_{\mathfrak{a}}$ of the symmetric space in terms of the Characters of the Weight lattice of the group. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2007 journal article

Computing the fine structure of real reductive symmetric spaces

JOURNAL OF SYMBOLIC COMPUTATION, 42(5), 497–510.

By: J. Daniel* & A. Helminck n

Contributors: J. Daniel* & A. Helminck n

author keywords: symmetric spaces; Lie algebras of linear algebraic groups; computational Lie theory
TL;DR: It is shown that this fine structure can be obtained from the setting of a complex reductive Lie group with a pair of commuting involutions, and a number of algorithms for computing the fine structure of the latter are given. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2007 journal article

Properties of twisted involutions in signed permutation notation

Journal of Combinatorial Mathematics and Combinatorial Computing, 62, 121–128. http://www.scopus.com/inward/record.url?eid=2-s2.0-78651544802&partnerID=MN8TOARS

By: R. Haas, A. Helminck & N. Rizki

Contributors: R. Haas, A. Helminck & N. Rizki

Source: ORCID
Added: August 8, 2024

2006 conference paper

Implementation of algorithms for computing characters for symmetric spaces

Congr. Numer., 180, 5–20.

By: D. Gagliardi & A. Helminck

Source: ORCID
Added: August 8, 2024

2006 conference paper

Implementing an algorithm for the twisted involution poset for Weyl groups

Congr. Numer., 182, 137–144.

By: K. Brenneman, R. Haas & A. Helminck

Source: ORCID
Added: August 8, 2024

2006 article

Involutions of SL(n,k), (n < 2)

Helminck, A. G., Wu, L., & Dometrius, C. E. (2006, January). Involutions of SL(n,k), (n < 2). ACTA APPLICANDAE MATHEMATICAE, Vol. 90, pp. 91–119.

By: A. Helminck n, L. Wu n & C. Dometrius*

Contributors: A. Helminck n, L. Wu n & C. Dometrius*

author keywords: flag variety; symmetric subgroup
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2005 article

Multiplicity one for representations corresponding to spherical distribution vectors of class rho

Helminck, A. G., & Helminck, G. F. (2005, March). ACTA APPLICANDAE MATHEMATICAE, Vol. 86, pp. 21–48.

By: A. Helminck n & G. Helminck*

Contributors: A. Helminck n & G. Helminck*

author keywords: Hilbert subspace; distribution vector; spherical distribution; Plancherel formula
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2004 journal article

Smoothness of quotients associated with a pair of commuting involutions

CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES, 56(5), 945–962.

By: A. Helminck* & G. Schwarz

Contributors: A. Helminck* & G. Schwarz

Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2002 journal article

Classification of involutions of SL(2, k)

COMMUNICATIONS IN ALGEBRA, 30(1), 193–203.

By: A. Helminck n & L. Wu n

Contributors: A. Helminck n & L. Wu n

Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2002 article

Hilbert flag varieties and their Kahler structure

Helminck, G. F., & Helminck, A. G. (2002, October 11). JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, Vol. 35, pp. 8531–8550.

By: G. Helminck* & A. Helminck n

Contributors: G. Helminck* & A. Helminck n

UN Sustainable Development Goal Categories
14. Life Below Water (Web of Science)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2002 article

Orbits and invariants associated with a pair of spherical varieties: Some examples

Helminck, A. G., & Schwarz, G. W. (2002, August). ACTA APPLICANDAE MATHEMATICAE, Vol. 73, pp. 103–113.

By: A. Helminck n & G. Schwarz*

Contributors: A. Helminck n & G. Schwarz*

author keywords: symmetric variety; symmetric subgroup; spherical subgroup
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2002 article

Spherical distribution vectors

Helminck, A. G., & Helminck, G. F. (2002, August). ACTA APPLICANDAE MATHEMATICAE, Vol. 73, pp. 39–57.

By: A. Helminck n & G. Helminck*

Contributors: A. Helminck n & G. Helminck*

author keywords: Hilbert subspace; distribution vector; spherical distribution; Plancherel formula
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2001 journal article

Orbits and invariants associated with a pair of commuting involutions

DUKE MATHEMATICAL JOURNAL, 106(2), 237–279.

By: A. Helminck* & G. Schwarz

Contributors: A. Helminck* & G. Schwarz

Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2000 journal article

Computing orbits of minimal parabolic k-subgroups acting on symmetric k-varieties

JOURNAL OF SYMBOLIC COMPUTATION, 30(5), 521–553.

By: A. Helminck n

Contributors: A. Helminck n

TL;DR: This paper presents an algorithm to compute the orbits of a minimal parabolic k -subgroup acting on a symmetric k -variety and most of the combinatorial structure of the orbit decomposition and shows how the algorithm in Helminck (1996) can be adjusted and extended to compute these twisted involutions. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2000 journal article

On orbit closures of symmetric subgroups in flag varieties

CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES, 52(2), 265–292.

By: M. Brion & A. Helminck*

Contributors: M. Brion & A. Helminck*

Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2000 journal article

On the classification of k-involutions

ADVANCES IN MATHEMATICS, 153(1), 1–117.

By: A. Helminck n

Contributors: A. Helminck n

author keywords: symmetric spaces; symmetric varieties; k-involutions
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

1999 journal article

A conjugacy theorem for symmetric spaces

MATHEMATISCHE ANNALEN, 313(4), 785–791.

By: A. Helminck n, J. Hilgert*, A. Neumam & G. Olafsson*

Contributors: A. Helminck n, J. Hilgert*, A. Neumann* & G. Ólafsson*

Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

1998 journal article

A class of parabolic k-subgroups associated with symmetric k-varieties

TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 350(11), 4669–4691.

By: A. Helminck n & G. Helminck*

Contributors: A. Helminck n & G. Helminck*

Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

1997 journal article

Tori invariant under an involutorial automorphism .2.

ADVANCES IN MATHEMATICS, 131(1), 1–92.

By: A. Helminck n

Contributors: A. Helminck n

Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

1996 journal article

Computing B-orbits on G/H

Journal of Symbolic Computation, 21(2), 169–209.

By: A. Helminck n

Contributors: A. Helminck n

UN Sustainable Development Goal Categories
4. Quality Education (OpenAlex)
Source: ORCID
Added: August 8, 2024

1995 journal article

Infinite-dimensional flag manifolds in integrable systems

Acta Applicandae Mathematicae, 41(1-3), 99–121.

By: G. Helminck* & A. Helminck n

Contributors: G. Helminck* & A. Helminck n

Source: ORCID
Added: August 8, 2024

1994 chapter

Holomorphic line bundles over Hilbert flag varieties

In Algebraic groups and their generalizations: quantum and infinite-dimensional methods (University Park, PA, 1991) (Vol. 56, pp. 349–375). Amer. Math. Soc., Providence, RI.

By: A. Helminck & G. Helminck

Source: ORCID
Added: August 8, 2024

1994 chapter

Symmetric $k$-varieties

In Algebraic groups and their generalizations: classical methods (University Park, PA, 1991) (Vol. 56, pp. 233–279). Amer. Math. Soc., Providence, RI.

By: A. Helminck

Source: ORCID
Added: August 8, 2024

1994 journal article

The Structure of Hilbert Flag Varieties Dedicated to the memory of our father

Publications of the Research Institute for Mathematical Sciences, 30(3), 401–441.

By: G. Helminck n & A. Helminck n

Contributors: G. Helminck n & A. Helminck n

Source: ORCID
Added: August 8, 2024

1993 journal article

On rationality properties of involutions of reductive groups

Advances in Mathematics, 99(1), 26–96.

By: A. Helminck n & S. Wang n

Contributors: A. Helminck n & S. Wang n

Source: ORCID
Added: August 8, 2024

1991 conference paper

On groups with a Cartan involution

Proceedings of the Hyderabad Conference on Algebraic Groups (Hyderabad, 1989), 151–192. Manoj Prakashan, Madras.

By: A. Helminck

Source: ORCID
Added: August 8, 2024

1991 journal article

Tori invariant under an involutorial automorphism, I

Advances in Mathematics, 85(1), 1–38.

By: A. Helminck n

Contributors: A. Helminck n

Source: ORCID
Added: August 8, 2024

1989 conference paper

On the orbits of symmetric spaces under the action of parabolic subgroups

Invariant Theory, 435–447.

By: A. Helminck*

Source: ORCID
Added: August 8, 2024

1988 journal article

Algebraic groups with a commuting pair of involutions and semisimple symmetric spaces

Advances in Mathematics, 71(1), 21–91.

By: A. Helminck*

Contributors: A. Helminck*

Source: ORCID
Added: August 8, 2024

1988 journal article

Trilinear alternating forms on a vector space of dimension 7

Communications in Algebra, 16(1), 1–25.

By: A. Cohen & A. Helminck*

Contributors: A. Cohen & A. Helminck*

Source: ORCID
Added: August 8, 2024

1986 chapter

A classification of semisimple symmetric pairs and their restricted root system

In Lie algebras and related topics (Windsor, Ont., 1984) (Vol. 5, pp. 333–340). Amer. Math. Soc., Providence, RI.

By: A. Helminck

Source: ORCID
Added: August 8, 2024

1982 book

The structure of real semisimple Lie groups

(Vol. 49, p. v+141). Mathematisch Centrum, Amsterdam.

By: T. Koornwinder, B. Hoogenboom, A. Cohen, J. Vries & A. Helminck

Source: ORCID
Added: August 8, 2024

journal article

On the structure of generalized symmetric spaces of SL<inf>n</inf>F<inf>q</inf>)

Communications in Algebra, 45(12), 5123–5136.

By: C. Buell, A. Helminck, V. Klima, J. Schaefer, C. Wright & E. Ziliak

Contributors: C. Buell, A. Helminck, V. Klima, J. Schaefer, C. Wright & E. Ziliak

Source: ORCID
Added: August 8, 2024

Employment

Updated: October 18th, 2020 22:00

2016 - present

University of Hawaii at Manoa Honolulu, Hawaii, US
Dean of Natural Sciences College of Natural Sciences

1987 - 2016

North Carolina State University Raleigh, NC, US
Mathematics

1985 - 1987

University of Michigan Ann Arbor, MI, US
Mathematics

Education

Updated: October 18th, 2020 22:02

Universiteit Utrecht Utrecht, Utrecht, NL
PhD Mathematics

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