Fachbereich Mathematik

Prof. Dr. Dr. h.c. Gert-Martin Greuel - Publications

Books

  1. G.-M. Greuel, G. Trautmann (Eds.) : Singularities, Representation of Algebras, and Vectorbundles. In: Lambrecht Proceedings 1985. Lecture Notes in Math. 1273. Springer Verlag, Berlin, Heidelberg, New York (1987).
  2. G.-M. Greuel, B.H. Matzat, G. Hiss (Eds.) : Algorithmic Algebra and Number Theory. Springer Verlag, Berlin, Heidelberg, New York (1998), 442 pages.
  3. V.I. Arnold, G.-M. Greuel, J.H.M. Steenbrink (Eds.) : Singularities. The Brieskorn Anniversary Volume. Springer Verlag, Berlin, Heidelberg, New York. Series: Progress in Mathematics , Vol. 162 (1998).
  4. G.-M. Greuel, G. Pfister: A SINGULAR Introduction to Commutative Algebra. Springer Verlag, Berlin, Heidelberg, New York (2002), 605 pages.
  5. G.-M. Greuel, C. Lossen, E. Shustin: Introduction to Singularities and Deformations. Springer Verlag, Berlin, Heidelberg, New York (2006), 476 pages.
  6. G.-M. Greuel, G. Pfister: A SINGULAR Introduction to Commutative Algebra, 2nd Edition. Springer Verlag, Berlin, Heidelberg, New York (2008), 705 pages.
  7. G.-M. Greuel, R. Remmert, G. Rupprecht (Hrsg.): Mathematik - Motor der Wirtschaft. Springer Verlag, Berlin, Heidelberg, New York (2008), 125 pages.
  8. G.-M. Greuel, A.D. Matt (Hrsg.): Imaginary: Mit den Augen der Mathematik. Mathematisches Forschungsinstitut Oberwolfach (2008), 125 pages, many illustrations.
  9. Gert-Martin Greuel, Thorsten Koch, Peter Paule, Andrew Sommese (Eds.): Mathematical software - ICMS 2016. 5th international conference, Berlin, Germany, July 2016. Proceedings. Lecture Notes in Computer Science 9725, Springer (2016), 532 pages.

Articles

  1. E. Brieskorn, G.-M. Greuel: Singularities of complete intersections. In: A. Hattori: Manifolds, Tokyo 1973. Univ. of Tokyo Press (1975), 123-129.
  2. G.-M. Greuel: Der Gauß-Manin-Zusammenhang isolierter Singularitäten von vollständigen Durchschnitten. Math. Ann. 214 (1975), 235-266.
  3. G.-M. Greuel, Lê Dung Tráng: Spitzen, Doppelpunkte und vertikale Tangenten in der Diskriminante verseller Deformationen von vollständigen Durchschnitten. Math. Ann. 222 (1976), 71-88.
  4. G.-M. Greuel: Cohomologie des singularités non isolées. C.R. Acad. Sci. Paris Sér. A Math. 284 (1977), 321-322.
  5. G.-M. Greuel: Die Zahl der Spitzen und die Jacobi-Algebra einer isolierten Hyperflächensingularität. Manuscr. Math. 21 (1977), 227-241, Ergänzung und Berichtigung: ibid. 25, 205-208 (1978).
  6. G.-M. Greuel, H.A. Hamm: Invarianten quasihomogener vollständiger Durchschnitte. Invent. Math. 49 (1978), 67-86.
  7. R.-O. Buchweitz, G.-M. Greuel: Le nombre de Milnor, équisingularité et déformations de singularités des courbes réduites. C.R. Acad. Sci. Paris Sér. A Math. 288 (1979), 35-38.
  8. G.-M. Greuel: Kohomologische Methoden in der Theorie isolierter Singularitäten. Habilitationsschrift, Bonn (1979).
  9. R.-O. Buchweitz, G.-M. Greuel: The Milnor number and deformations of complex curve singularities. Invent. Math. 58 (1980), 241-281.
  10. R.-O. Buchweitz, G.-M. Greuel: Le nombre de Milnor équisingularité et déformations des courbes réduites. In: Sém. sur les Singularités. Publ. Math. Univ. Paris 7 (1980), 13-30.
  11. G.-M. Greuel: Dualität in der lokalen Kohomologie isolierter Singularitäten. Math. Ann. 250 (1980), 157-173.
  12. G.-M. Greuel: On deformation of curves and a formula of Deligne. In: J.M. Aroca, R.-O. Buchweitz, M. Giusti, M. Merle: Algebraic Geometry, La Rábida 1981. Lecture Notes in Math. 961, Springer 1983, 141-168.
  13. G.-M. Greuel, J.H.M. Steenbrink: On the topology of smoothable singularities. In: P. Orlik: Singularities, Arcata 1981. Proc. Sympos. Pure Math. 40,1 (1983), 535-545.
  14. G.-M. Greuel: A remark on the paper of A. Tannenbaum. Compos. Math. 51 (1984), 185-187.
  15. G.-M. Greuel, H. Knörrer: Einfache Kurvensingularitäten und torsionsfreie Moduln. Math. Ann. 270 (1985), 417-425.
  16. G.-M. Greuel, E. Looijenga: The dimension of smoothing components. Duke Math. Journ. 52 (1985), 263-272.
  17. Greuel G.-M., B. Martin, G. Pfister: Numerische Charakterisierung quasihomogener Gorenstein-Kurvensingularitäten. Math. Nachr. 124 (1985), 123-131.
  18. G.-M. Greuel: Constant Milnor number implies constant multiplicity for quasihomogeneous singularities. Manuscr. Math. 56 (1986), 159-166.
  19. G.-M. Greuel: Torsion free modules and simple curve singularities. Canad. Math. Soc. Conf. Proceedings 6 (1986), 91-94.
  20. R.-O. Buchweitz, G.-M. Greuel, F.-O.Schreyer: Cohen-Macaulay modules on hypersurface singularities, II. Invent. Math. 88 (1987), 165-182.
  21. G.-M. Greuel, G. Trautmann (Eds.): Singularities, Representation of Algebras, and Vectorbundles. In: Lambrecht Proceedings 1985. Lecture Notes in Math. 1273, Springer (1987).
  22. G.-M. Greuel, U. Karras: Families of varieties with prescribed singularities. Compos. Math. 69 (1989), 83-110.
  23. Brücker, C., G.-M. Greuel: Deformationen isolierter Kurvensingularitäten mit eingebetteten Komponenten. Manuscr. Math. 70 (1990), 93-114.
  24. G.-M. Greuel, H. Kröning: Simple Singularities in Positive Characteristic. Math. Z. 203 (1990), 339-354.
  25. G.-M. Greuel: Deformation und Klassifikation von Singularitäten und Moduln. Jahresber. Deutsch. Math.-Verein. Jubiläumstagung 1990 (1992), 177-238.
  26. Y.A. Drozd, G.-M. Greuel: Tame-wild dichotomy for Cohen-Macaulay modules. Math. Ann. 95 (1992), 387-394.
  27. G.-M. Greuel, G. Pfister: On moduli spaces of semiquasihomogeneous singularities..
  28. Y.A. Drozd, G.-M. Greuel: Cohen-Macaulay module type. Comp. Math. 89 (1993), 315-338.
  29. G.-M. Greuel, G. Pfister: Geometric quotients of unipotent group actions. Proc. London Math. Soc. 67 (1993), 75-105.
  30. G.-M. Greuel, G. Pfister: Moduli spaces for torsion free modules on curve singularities I. Journ. Alg. Geom. 2 (1993), 81-135.
  31. G.-M. Greuel, G. Pfister: Moduli for Singularities. In: J.-P. Brasselet: Singularities. London Math. Soc. Lect. Notes 201, Cambridge Univ. Press, Cambridge (1994), 119-146.
  32. H. Grassmann, G.-M. Greuel, B. Martin, W. Neumann, G. Pfister, W. Pohl, H. Schönemann, T. Siebert: Standard bases, syzygies and their implementation in SINGULAR. In: Beiträge zur angewandten Analysis und Informatik. Shaker, Aachen (1994), 69-96.
  33. Y. Drozd, G.-M. Greuel: Semicontinuity for representations of Cohen-Macaulay rings. Math. Ann. 306 (1996), 371-389.
  34. H. Grassmann, G.-M. Greuel, B. Martin, W. Neumann, G. Pfister, W. Pohl, H. Schönemann, T. Siebert: On an implementation of standard bases and syzygies in SINGULAR. AAECC 7 (1996), 235-149.
  35. G.-M. Greuel, C. Lossen: Equianalytic and equisingular families of curves on surfaces. Manuscr. Math 91 (1996), 323-342.
  36. G.-M. Greuel, G. Pfister: Advances and improvements in the theory of standard bases and syzygies. Arch. Math. 66 (1996), 163-176.
  37. G.-M. Greuel, G. Pfister: On moduli spaces of semiquasihomogeneous singularities. In: Algebraic geometry and singularities (La Rábida, 1991). Birkhäuser Progress in Mathematics 134 (1996), 171-185.
  38. G.-M. Greuel: Description of SINGULAR : A Computer Algebra System for Singularity Theory, Algebraic Geometry and Commutative Algebra. Euromath Bulletin 2 (1996), 161-172.
  39. G.-M. Greuel, C. Hertling, G. Pfister: Moduli Spaces of Semiquasihomogeneous Singularities with fixed Principal Part. Journ. Alg. Geom. 6 (1997), 169-199.
  40. G.-M. Greuel, Ch. Lossen, E. Shustin: New asymptotics in the geometry of equisingular families of curves. IMRN 13 (1997), 595-611.
  41. W. Decker, G.-M. Greuel, G. Pfister, T. De Jong: The normalisation: a new algorithm, implementation and comparisons. In: Proc. EUROCONFERENCE Computational Methods for Representations of Groups and Algebras (1.4.-5.4.1997). Birkhäuser (1998).
  42. Y.A. Drozd, G.-M. Greuel: On Schappert's characterization of strictly unimodal plane curve singularities. In: V.I. Arnold, G.-M. Greuel, J.H.M. Steenbrink: Singularities, The Brieskorn Anniversary Volume. Birkhäuser (1998), 3-26.
  43. G.-M. Greuel, G. Pfister, H. Schönemann: SINGULAR, A System for Polynomial Computations, version 1.2, User Manual. In: Reports On Computer Algebra. Centre for Computer Algebra, University of Kaiserslautern (1998).
  44. G.-M. Greuel, G. Pfister: Geometric quotients of unipotent group actions II. In: V.I. Arnold, G.-M. Greuel, J.H.M. Steenbrink: Singularities, The Brieskorn Anniversary Volume. Birkhäuser (1998), 27-36.
  45. G.-M. Greuel, Ch. Lossen, E. Shustin: Geometry of families of nodal curves on the blown-up projective plane. Trans. AMS 350 (1998), 251-274.
  46. G.-M. Greuel, Ch. Lossen, E. Shustin: Plane curves of minimal degree with prescribed singularities. Invent. Math. 133 (1998), 539-580.
  47. W. Decker, G.-M. Greuel, G. Pfister: Primary decomposition: algorithms and comparisons. In: G.-M. Greuel, B.H. Matzat, G. Hiss: Algorithmic Algebra and Number Theory. Springer Verlag, Heidelberg (1998), 187-220.
  48. G.-M. Greuel, G. Pfister: Gröbner bases and algebraic geometry. In: B. Buchberger and F. Winkler: Gröbner Bases and Applications. LNS 251 , CUP (1998), 109-143.
  49. G.-M. Greuel: Some Aspects of Brieskorn's Mathematical Work. In: V.I. Arnold, G.-M. Greuel, J.H.M. Steenbrink: Singularities, The Brieskorn Anniversary Volume. Birkhäuser (1998), xv-xxii.
  50. G.-M. Greuel, E. Shustin: Geometry of Equisingular Families of Curves. In: B. Bruce, D. Mond: Singularity Theory. London Math. Soc. LNS 263, Cambridge University Press (1999), 79-108.
  51. G.-M. Greuel, Ch. Lossen, E. Shustin: Castelnuovo Function, Zero-dimensional Schemes and Singular Plane Curves. Journ. Alg. Geom. 9 (2000), 663-710.
  52. G.-M. Greuel: Applications of Computer Algebra to Algebraic Geometry, Singularity Theory and Symbolic-Numerical Solving. In: European Congeress of Mathematicians, Barcelona, July 10-14, 2000, Vol. II. (2000), 169-188.
  53. G.-M. Greuel: Computer Algebra and Algebraic Geometry - Achievements and Perspectives. Journ. Symb. Comp. 30,3 (2000), 253-290.
  54. G.-M. Greuel, C. Lossen, E. Shustin: The Variety of Plane Curves with Ordinary Singularities is not Irreducible. IMRN (2000).
  55. Y.A. Drozd, G.-M. Greuel, I. Kashuba: On Cohen-Macaulay Modules on Surface Singularities. Moscow Math. Journ. 3,2 (2003), 397-418.
  56. Y.A. Drozd, G.-M. Greuel: Tame and Wild Projective Curves and Classification of Vector Bundles. Journ. Alg. (2001).
  57. G.-M. Greuel, G. Pfister, H. Schönemann: SINGULAR - A Computer Algebra System for Polynomial Computations. In: M. Kerber and M. Kohlhase: Symbolic Computation and Automated Reasoning, The Calculemus-2000 Symposium. (2001), 227-233.
  58. G.-M. Greuel, C. Lossen: The Geometry of Families of Singular Curves. In: D. Siersma, C.T.C. Wall, V. Zakalyukin: New developments in Singularity Theory. NATO Science Series , Kluwer (2001), 159-192.
  59. I. Burban, Y.A. Drozd, G.-M. Greuel: Vector Bundles on Singular Projective Curves. In: C. Ciliberto et al: Application of Algebraic Geometry to Coding Theory, Physics and Computation, Proceedings. Kluwer (2001), 1-15.
  60. G.-M. Greuel, C. Lossen, M. Schulze: Three Algorithms in Algebraic Geometry, Coding Theory, and Singularity Theory. In: C. Ciliberto et al: Application of Algebraic Geometry to Coding Theory, Physics and Computation, Proceedings. Kluwer (2001), 161-194.
  61. G.-M. Greuel: A Computer Algebra Solution to a Problem in Finite groups. Revista Matematica Iberoamericana 19, no. 2 (2003), 413-424.
  62. G.-M. Greuel, G. Pfister: Computer Algebra and Finite Groups. In: A. Cohen, X.-S. Gao, N. Takayama: Proceedings of the First International Congress of Mathematical Software, Beijing 2002. World Scientific (2002), 4-14.
  63. T. Bandman, G.-M. Greuel, F. Grunewald, B. Kunyavskii, G. Pfister, E. Plotkin: Two-variable identities for finite solvable groups. C.R. Acad. Sci. Paris, Ser. I 337 (2003), 581-586.
  64. T. Bandman, G.-M. Greuel, F. Grunewald, B. Kunyavskii, G. Pfister, E. Plotkin: Engel-Like Identities Characterizing Finite Solvable Groups. Compositio Math. 142, no.3 (2006), 734-764.
  65. G.-M. Greuel, Vik.S. Kulikov: On Symplectic Coverings of the Projective Plane. Izv. Math., 69 (4) (2005), 667-701.
  66. G.-M. Greuel, C. Lossen, E. Shustin: Equisingular Families of Projective Curves. In: Catanese et al. eds.: Global Aspects of Complex Geometry, Springer Verlag (2006), 171-210.
  67. L. Bodnarchuk, I. Burban. Y. Drozd, G.-M. Greuel: Vector Bundles and Torsion Free Sheaves on Degenerations of Elliptic Curves. In: Catanese et al. eds.: Global Aspects of Complex Geometry, Springer Verlag (2006), 83-128.
  68. P. Chrusciel, G.-M. Greuel, R. Meinel, S. Szybka: The Ernst equation and ergosurfaces. Class. Quantum Grav. 23 No 13 (2006), 4399-4414.
  69. G.-M. Greuel, G. Pfister: SINGULAR and Applications. Jahresbericht der DMV 108 (2006), 167-196.
  70. A. Campillo, G.-M. Greuel, C. Lossen: Equisingular Calculations for Plane Curve Singularities. J. Symb. Comput. 42 (2007), 89-114.
  71. A. Campillo, G.-M. Greuel, C. Lossen: Equisingular deformations of plane curves in arbitrary characteristic. Compositio Mathematica (2007), 829-882.
  72. G.-M. Greuel, C.-T. Le: On deformations of maps and curve singularities. manuscripta math. 127 (2008), 1-21.
  73. G.-M. Greuel, J. E. Hopcroft, M. H. Wright: The Mathematical Work of Jon Kleinberg. Notices of the AMS, 54 No 6 (2007), 740 - 743.
  74. M. Brickenstein, A. Dreyer, G.-M. Greuel, M. Wedler, O. Wienand: New developments in the theory of Groebner bases and applications to formal verification. Journal of Pure and Applied Algebra, Vol. 213 (2009), 1612-1635.
  75. D. Ilsen, E. J. Roebbers, G.-M. Greuel: Algebraic and Combinatorial Algorithms for Translinear Network Synthesis. IEEE Transactions on Circuits and Systems - I:Regular Papers, VOL. 55 (2008), 3131 - 3144.
  76. O. Wienand, M. Wedler, D. Stoffel, W. Kunz, G.-M. Greuel: An algebraic approach for proving data correctness in arithmetic data paths. Proc. International Conference Computer Aided Verification (CAV), July 2008, Princeton, NJ, USA (2008), 473-486.
  77. G.-M. Greuel, F. Seelisch, O. Wienand: The Groebner Basis of the Ideal of Vanishing Polynomials. J. Symb. Comput. 46, doi:10.1016/j.jsc.2010.10.006 (2011), 561-570.
  78. G.-M. Greuel, S. Laplagne, F. Seelisch: Normalization of Rings. J. Symb. Comput. 45, doi:10.1016/j.jsc.2010.04.002 (2010), 887-901.
  79. L. Bodnarchuk, Y. Drozd, G.-M. Greuel: Simple Vector Bundles on Plane Degenerations of an Elliptic Curve. Trans. Amer. Math. Soc. 364 (2012), 137-174.
  80. Y. Boubakri, G.-M. Greuel, T. Markwig: Invariants of Hypersurface Singularities in Positive Characteristic. Rev. Mat. Complut. 25, doi:10.1007/s13163-010-0056-1 (2012), 61-85.
  81. Y. Boubakri, G.-M. Greuel, T. Markwig: Normal Forms of Hypersurface Singularities in Positive Characteristic. Moscow Math. Journal, Volume 11, Number 4 (2011), 26 pages.
  82. G.-M. Greuel, Nguyen H. D.: Some Remarks on the Planar Kouchnirenko's Theorem. Rev. Mat. Complut., Online First, DOI 10.1007/s13163-011-0082-7 (2011), 17 pages.
  83. Sanz-Sole, Marta; Atiyah, Michael; Bär, Christian; Greuel, Gert-Martin; Manin, Yuri I.; Bourguignon, Jean-Pierre: Friedrich Hirzebruch memorial session at the 6th European congress of mathematics. Krakow, July 5th, 201 . Eur. Math. Soc. Newsl. 85 (2012), 12-20.
  84. S. Bönisch, M. Brickenstein, H. Chrapary, G.-M. Greuel, W. Sperber: swMATH - a new information service for mathematical software. Intelligent Computer Mathematics, Lecture Notes in Computer Science 7961, Springer Verlag (2013), 369-373.
  85. G.-M. Greuel, Nguyen H. D.: Right simple singularities in positive characteristic. Journal für die reine und angewandte Mathematik (Crelles Journal). DOI: 10.1515/crelle-2013-0118, January 2014 Online (2014), 26 pages.
  86. Gert-Martin Greuel: IMAGINARY - Mathematical creations and experiences. In: Math communication for the future - A Vision Slam, Proceedings of the ICM Seoul, Vol. I (2014), 5 pages.
  87. Gert-Martin Greuel, Wolfram Sperber: swMATH -- an information service for mathematical software. In: Hong, Hoon (ed.) et al., Mathematical software -- ICMS 2014. 4th International Congress, Seoul, South Korea, August 5--9, 2014. Proceedings. Springer. Lecture Notes in Computer Science 8592 (2014) (2014), 691-701.
  88. Gert-Martin Greuel, Thuy H. Pham: Mather-Yau Theorem in Positive Characteristic. J. Algebr. Geom. 26, No. 2, 347-355 (ArXiv) (Zbl 1357.14010, 2017), 9 pages.
  89. Gert-Martin Greuel, Walter Purkert: Leben und Werk von Egbert Brieskorn (1936-2013). Jahresber. Dtsch. Math.- Ver. 118, No. 3, 143-178 (ArXiv) (Zbl 1352.01039, 2016), 35 pages.

Articles of General Type

  1. Gert-Martin Greuel, Andreas Daniel Matt: Das Reale hinter IMAGINARY. Mitteilungen der DMV Nr. 17 (2009), 41 - 43.
  2. Gert-Martin Greuel: Mathematics between Research, Application and Communication. E. Behrends et al. (eds.), Raising Public Awareness of Mathematics, Springer-Verlag Berlin Heidelberg (2012), 359-386.
  3. Gert-Martin Greuel: Mathematik zwischen Forschung, Anwendung und Vermittlung. Vortrag auf der 7. Tagung der Deutschen Gesellschaft für Geometrie und Grafik, Dresden 2011. Erscheint in Daniel Lordick (Hrsg.): Präsentation Mathematischer Modelle, Vieweg Verlag (2014), 27 Seiten.
  4. Sebastian Bönisch, Michael Brickenstein, Gert-Martin Greuel, Wolfram Sperber: swMATH - citations for your mathematical software. Computeralgebra-Rundbrief Nr. 51, Oktober 2012, Fachgruppe Computeralgebra (2012), 10 - 11.
  5. S. Bönisch, G.-M. Greuel, W. Sperber: Building an Information Service for Mathematical Software - the SMATH Project. Newsletter of the EMS, issue 83, March 2012 (2012), 51-52.
  6. G.-M. Greuel: Zentralblatt MATH. Newsletter of the EMS, issue 83, March 2012, Editorial (2012), 3-4.
  7. G.-M. Greuel: Zentralblatt MATH - Herausforderungen und Perspektiven. Mitteilungen der DMV, Band 20, Heft 1. Seiten 38-40, De Gruyter Verlag (2012), 38 - 40.
  8. Gert-Martin W. Greuel: Changes and Enhancements of the Publication Structure in Mathematics. In K. Kaiser, S. Krantz, B. Wegner (Eds.): Topics and Issues in Electronic Publishing. JMM/AMS Special Session, San Diego 2013, Proceedings, (2013), 41 - 56.
  9. Gert-Martin Greuel, Helena Mihaljevic-Brandt, Olaf Teschke: Neues vom Zentralblatt MATH - mehr als neue Kleider. Mitteilungen der DMV, Band 21, Heft 3, De Gruyter Verlag (2013), 136.
  10. Gert-Martin Greuel, Helena Mihaljevic-Brandt, Olaf Teschke: NEWS FROM ZBMATH, More than new clothes. The London Mathematical Society Newsletter, Issue 429, (2013), 20-21.
  11. Allouche, Jean-Paul; Dales, H.Garth; Greuel, Gert-Martin; Odlyzko, Andrew; Peters, Klaus; Werner, Dirk: Open access -- four opinions. In:Eur. Math. Soc. Newsl. 91 (2014), 39-43.
  12. Greuel, Gert-Martin; Matt, Andreas Daniel; Mey, Antonia S.J.S.: Editorial: IMAGINARY -- mathematics communication for the 21st century. In:Eur. Math. Soc. Newsl. 92 (2014), 3-6.
  13. Gert-Martin Greuel: Kristalle und Mathematik. Mitt. Dtsch. Math.-Ver. 22, No. 4 (2014), 212-217.
  14. Gert-Martin Greuel: Crystals and Mathematics. In: A Focus on Crystallography, FIZ Karlsruhe (2014), 37-43.
  15. Sanz-Sole, Marta; Brezzi, Franco; Raussen, Martin; Huggett, Stephen; Väänänen, Jouko; Fialowski, Alice; Greuel, Gert-Martin; Halpern, Laurence; Mehrmann, Volker; Sergeev, Armen: EMS Paper on Open Access. Eur. Math. Soc. Newsl. 95, 7-8 (2015), 4 pages.
  16. Gert-Martin Greuel: Mathematics between research, application, and communication. Eur. Math. Soc. Newsl. 97, 44-51 (2015), 7 pages.

Software, Data bases, Platforms

  1. G.-M. Greuel, G. Pfister, H. Schönemann, W. Decker: SINGULAR - A Computer Algebra System for Polynomial Computations. Free software under the GNU General Public License (1990 - to date).
  2. G.-M. Greuel, M. Brickenstein: Oberwolfach References on Mathematical Software (ORMS). A Web-interfaced Collection of Information and Links on Mathematical Software (2005 - to date).
  3. Gert-Martin Greuel, Andreas Daniel Matt, Christian Stussak: IMAGINARY - open mathematics. An open, interactive platform and organization for communicating mathematics (2008 - to date).
  4. G.-M. Greuel, W. Sperber; M. Brickenstein, C. Knoth; S. Bönisch, H. Chrapary: swMATH - an information service for mathematical software. An Open Access Database about Mathematical Software (2011 - to date).
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