Abstract
In this survey article, we discuss the theory of Koszul algebras and Koszul duality. Koszul property plays an important role in various topics such as commutative and noncommutative algebra, geometry, topology, Lie algebras, representation theory, combinatorics and semigroup rings. Most of the results in this survey article are already known or are easy corollaries of known results. We collect these results and we discuss some proofs. Several survey articles, notably [22, 13,14,15, 31], and a book on quadratic algebras [36] contain valuable material to the theory of Koszul algebras or Koszul duality. Keeping these survey articles in mind, the focus has been to collect new results on Koszulness of diagonal subalgebras, its interaction with Pólya frequency sequence, and monomial projective curves.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
H. Ananthnarayan, N. Kumar, V. Mukundan, Diagonal subalgebras of residual intersections. Proc. Am. Math. Soc. 148(1), 41–52 (2020)
D.J. Anick, A counterexample to a conjecture of Serre. Ann. Math. (2). 115(1), 1–33 (1982)
M. Artin, M. Nagata, Residual intersections in Cohen-Macaulay rings. J. Math. Kyoto Univ. 12, 307–323 (1972)
J. Backelin, On the rates of growth of the homologies of Veronese subrings. in Algebra, Algebraic Topology and Their Interactions (Stockholm, 1983). Lecture Notes in Mathematics, vol. 1183 (Springer, Berlin, 1986), pp. 79–100
I. Bermejo, G. García-Llorente, I. García-Marco, Algebraic invariants of projective monomial curves associated to generalized arithmetic sequences. J. Symbol. Comput. 81, 1–19 (2017)
S. Blum, Subalgebras of bigraded Koszul algebras. J. Algebra 242(2), 795–809 (2001)
F. Brenti, Unimodal, log-concave and Pólya frequency sequences in combinatorics. Mem. Am. Math. Soc. 81(413), viii+106 (1989)
W. Bruns, J. Herzog, Cohen–Macaulay Rings. Cambridge Studies in Advanced Mathematics, vol. 39 (Cambridge University Press, Cambridge, 1993), pp. xii+403
W. Bruns, J. Herzog, U. Vetter, Syzygies and walks, in Commutative Algebra (Trieste, 1992) (World Scientific Publishing, River Edge, NJ, 1994), pp. 36–57
W. Bruns, A.R. Kustin, M. Miller, The resolution of the generic residual intersection of a complete intersection. J. Algebra 128(1), 214–239 (1990)
G. Caviglia, The pinched Veronese is Koszul. J. Algebr. Combin. 30(4), 539–548 (2009)
G. Caviglia, A. Conca, Koszul property of projections of the Veronese cubic surface. Adv. Math. 234, 404–413 (2013)
A. Conca, Koszul algebras and their syzygies, in Combinatorial Algebraic Geometry. Lecture Notes in Mathematics, vol. 2108, (Springer, Cham, 2014), pp. 1–31
A. Conca, Koszul algebras. Boll. Unione Mat. Ital. (9). 1(2), 429–437 (2008)
A. Conca, E. De Negri, M.E. Rossi, Koszul Algebras and Regularity, Commutative Algebra, vol. 1 (Springer, New York, 2013), pp. 285–315
A. Conca, Maria Evelina Rossi and Giuseppe Valla, Gröbner flags and Gorenstein algebras. Compos. Math. 129(1), 95–121 (2001)
A. Conca, Ngô Viêt Trung and Giuseppe Valla, Koszul property for points in projective spaces. Math. Scand. 89(2), 201–216 (2001)
A. Conca, J. Herzog, Ngô Viêt Trung and Giuseppe Valla, diagonal subalgebras of bigraded algebras and embeddings of blow-ups of projective spaces. Am. J. Math. 119(4), 859–901 (1997)
C. David, Butler, normal generation of vector bundles over a curve. J. Differ. Geom. 39(1), 1–34 (1994)
D. Eisenbud, Commutative Algebra. Graduate Texts in Mathematics, With a View Toward Algebraic Geometry, vol. 150 (Springer, New York, 1995), pp. xvi+785
D. Eisenbud, A. Reeves, B. Totaro, Initial ideals, Veronese subrings, and rates of algebras. Adv. Math. 109(2), 168–187 (1994)
R. Fröberg, Koszul algebras, in Advances in Commutative Ring Theory (Fez, 1997), vol. 205 (Taylor & Francis Limited, London, 1999), pp. 337–350
R. Fröberg, J.-E. Roos, An affine monomial curve with irrational Poincaré-Betti series. J. Pure Appl. Algebra 152(1–3), 89–92 (2000)
R. Fröberg, Determination of a class of Poincaré series. Math. Scand. 37(1), 29–39 (1975)
R. George, Kempf, Some wonderful rings in algebraic geometry. J. Algebra 134(1), 222–224 (1990)
R. George, Kempf, Syzygies for points in projective space. J. Algebra 145(1), 219–223 (1992)
J. Herzog, V. Reiner, V. Welker, The Koszul property in affine semigroup rings. Pac. J. Math. 186(1), 39–65 (1998)
D. Hilbert, Ueber die Theorie der algebraischen Formen. Math. Ann. 36(4), 473–534 (1890)
N. Kumar, Koszul property of diagonal subalgebras. J. Commut. Algebra 6(3), 385–406 (2014)
C. Löfwall, On the subalgebra generated by the one-dimensional elements in the Yoneda Ext-algebra, in Algebra, Algebraic Topology and Their Interactions (Stockholm, 1983), vol. 1183 (Springer, Berlin)291–338
R. Martínez-Villa, Introduction to Koszul algebras. Rev. Un. Mat. Argent. 48, 67–95 (2008)
D. Mumford, Varieties defined by quadratic equations, in Questions on Algebraic Varieties (C.I.M.E., III Ciclo, Varenna, 1969) (Edizioni Cremonese, Rome, 1970), pp. 29–100
G. Pareschi, B.P. Purnaprajna, Canonical ring of a curve is Koszul: a simple proof. Ill. J. Math. 41(2), 266–271 (1997)
I. Peeva, V. Reiner, B. Sturmfels, How to shell a monoid. Math. Ann. 310(2), 379–393 (1998)
K. Petri, Über die invariante Darstellung algebraischer Funktioneneiner Veränderlichen. Math. Ann. 88(3–4), 242–289 (1923)
A. Polishchuk, L. Positselski, Quadratic algebras. University Lecture Series, vol. 37 (American Mathematical Society, Providence, RI, 2005), pp. xii+159
A. Polishchuk, On the Koszul property of the homogeneous coordinate ring of a curve. J. Algebra 178(1), 122–135 (1995)
V. Reiner, V. Welker, On the Charney-Davis and Neggers-Stanley conjectures. J. Combin. Theory Ser. A 109(2), 247–280 (2005)
J.-E. Roos, B. Sturmfels, A toric ring with irrational Poincaré-Betti series, C. R. Acad. Sci. Paris Sér. I Math. 326(2), pp. 141–146 (1998)
A. Simis, N.V. Trung, G. Valla, The diagonal subalgebra of a blow-up algebra. J. Pure Appl. Algebra 125(1–3), 305–328 (1998)
B. Stewart, Priddy, Koszul resolutions. Trans. Am. Math. Soc. 152, 39–60 (1970)
B. Sturmfels, Gröbner bases and convex polytopes. University Lecture Series, vol. 8 (American Mathematical Society, Providence, RI, 1996), pp. xii+162
J. Tate, Homology of Noetherian rings and local rings. Ill. J. Math. 1, 14–27 (1957)
A. Vishik, M. Finkelberg, The coordinate ring of general curve of genus \(g\ge 5\) is Koszul. J. Algebra 162(2), 535–539 (1993)
S. Yuzvinskiĭ, Orlik-Solomon algebras in algebra and topology. Uspekhi Mat. Nauk 56(338), 87–166 (2001)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Kumar, N. (2020). A Survey on Koszul Algebras and Koszul Duality. In: Ambily, A., Hazrat, R., Sury, B. (eds) Leavitt Path Algebras and Classical K-Theory. Indian Statistical Institute Series. Springer, Singapore. https://doi.org/10.1007/978-981-15-1611-5_7
Download citation
DOI: https://doi.org/10.1007/978-981-15-1611-5_7
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-15-1610-8
Online ISBN: 978-981-15-1611-5
eBook Packages: Mathematics and StatisticsMathematics and Statistics (R0)