Abstract
In discrete geometry, the contact number of a given finite number of non-overlapping spheres was introduced as a generalization of Newton’s kissing number. This notion has not only led to interesting mathematics, but has also found applications in the science of self-assembling materials, such as colloidal matter. With geometers, chemists, physicists and materials scientists researching the topic, there is a need to inform on the state of the art of the contact number problem. In this paper, we investigate the problem in general and emphasize important special cases including contact numbers of minimally rigid and totally separable sphere packings. We also discuss the complexity of recognizing contact graphs in a fixed dimension. Moreover, we list some conjectures and open problems.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsNotes
- 1.
- 2.
According to [3], for \(n\le 7\), it is possible to solve the system (3) using standard algebraic geometry methods for all \(A\in \mathcal {A}\) without filtering by geometric rules. Arkus et al. [3] attempted this using the package SINGULAR. Therefore, most likely for \(n=6,7\), the maximal contact graphs as obtained in [3] are optimal for minimally rigid sphere packings.
- 3.
It is worth-noting that Koebe’s paper was written in German and titled ‘Kontaktprobleme der konformen Abbildung’ (Contact problems of conformal mapping). Andreev’s paper appeared in Russian. Probably, the first instance of this result appearing in English was in Thurston’s lecture notes that were distributed by the Princeton University in 1980. However, the lectures were delivered in 1978–1979 [42].
References
L. Alonso, R. Cerf, The three dimensional polyominoes of minimal area. Electr. J. Combin. 3 (1996). #R27
E.M. Andreev, Convex polyhedra of finite volume in Lobačevskiĭ space. Mat. Sb. (N.S.) 83(125), 256–260 (1970). (Russian)
N. Arkus, V.N. Manoharan, M.P. Brenner, Deriving finite sphere packings. SIAM J. Discret. Math. 25(4), 1860–1901 (2011), arXiv:1011.5412v2 [cond-mat.soft]
K. Ball, An elementary introduction to modern convex geometry, in Flavors of Geometry, vol. 31, Mathematical Sciences Research Institute Publications, ed. by S. Levy (Cambridge University Press, Cambridge, 1997), pp. 1–58
U. Betke, M. Henk, J.M. Wills, Finite and infinite packings. J. reine angew. Math. 53, 165–191 (1994)
A. Bezdek, Locally separable circle packings. Studia Sci. Math. Hungar. 18(2–4), 371–375 (1983)
K. Bezdek, On the maximum number of touching pairs in a finite packing of translates of a convex body. J. Combin. Theory Ser. A 98, 192–200 (2002)
K. Bezdek, Contact numbers for congruent sphere packings in Euclidean 3-space. Discret. Comput. Geom. 48(2), 298–309 (2012)
K. Bezdek, Lectures on Sphere Arrangements - the Discrete Geometric Side, vol. 32, Fields Institute Monographs (Springer, New York, 2013)
K. Bezdek, P. Brass, On \(k^+\)-neighbour packings and one-sided Hadwiger configurations. Beitr. Algebr. Geom. 44, 493–498 (2003)
K. Bezdek, S. Reid, Contact graphs of unit sphere packings revisited. J. Geom. 104(1), 57–83 (2013)
K. Bezdek, Zs. Lángi, Density bounds for outer parallel domains of unit ball packings. Proc. Steklov Inst. Math. 288/1, 209–225 (2015)
K. Bezdek, R. Connelly, G. Kertész, On the average number of neighbours in spherical packing of congruent circles, Intuitive Geometry, vol. 48, Colloquia Mathematica Societatis János Bolyai (North Holland, Amsterdam, 1987), pp. 37–52
K. Bezdek, B. Szalkai, I. Szalkai, On contact numbers of totally separable unit sphere packings. Discret. Math. 339(2), 668–676 (2015)
L. Bowen, Circle packing in the hyperbolic plane. Math. Phys. Electr. J. 6, 1–10 (2000)
P. Boyvalenkov, S. Dodunekov, O. Musin, A survey on the kissing numbers. Serdica Math. J. 38(4), 507–522 (2012)
P. Brass, Erdős distance problems in normed spaces. Comput. Geom. 6, 195–214 (1996)
H. Breu, D.G. Kirkpatrick, On the complexity of recognizing intersection and touching graphs of discs, in Graph Drawing ed. by F.J. Brandenburg, Proceedings of Graph Drawing 95, Passau, September 1995. Lecture Notes in Computer Science, vol. 1027, Springer, Berlin, (1996), pp. 88–98
P. Erdős, On sets of distances of \(n\) points. Am. Math. Mon. 53, 248–250 (1946)
P. Erdős, Problems and results in combinatorial geometry, in Discrete Geometry and Convexity, vol. 440, Annals of the New York Academy of Sciences, ed. by J.E. Goodman, et al. (vvv, bbb, 1985), pp. 1–11
G. Fejes Tóth, L. Fejes Tóth, On totally separable domains. Acta Math. Acad. Sci. Hungar. 24, 229–232 (1973)
H. Hadwiger, Über Treffenzahlen bei translations gleichen Eikörpern. Arch. Math. 8, 212–213 (1957)
T.C. Hales, A proof of the Kepler conjecture. Ann. Math. 162(2–3), 1065–1185 (2005)
F. Harary, H. Harborth, Extremal animals. J. Comb. Inf. Syst. Sci. 1(1), 1–8 (1976)
H. Harborth, Lösung zu problem 664A. Elem. Math. 29, 14–15 (1974)
H. Harborth, L. Szabó, Z. Ujvári-Menyhárt, Regular sphere packings. Arch. Math. (Basel) 78/1, 81–89 (2002)
B. Hayes, The science of sticky spheres. Am. Sci. 100, 442–449 (2012)
B. Hayes, Sphere packings and hamiltonian paths (blog post posted on 13 March 2013), http://bit-player.org/2013/sphere-packings-and-hamiltonian-paths
P. Hliněný, Touching graphs of unit balls, in Graph Drawing ed. by G. DiBattista, Proceedings of Graph Drawing 97, Rome, September. Lecture Notes in Computer Science, vol. 1353 (Springer, Berlin, 1997), pp. 350–358
P. Hliněný, J. Kratochvíl, Representing graphs by disks and balls (a survey of recognition-complexity results). Discret. Math. 229, 101–124 (2001)
M. Holmes-Cerfon, Enumerating nonlinearly rigid sphere packings. SIAM Rev. 58(2), 229–244 (2016), arXiv:1407.3285v2 [cond-mat.soft]
R.S. Hoy, J. Harwayne-Gidansky, C.S. O’Hern, Structure of finite sphere packings via exact enumeration: implications for colloidal crystal nucleation. Phys. Rev. E 85, 051403 (2012)
G.A. Kabatiansky, V.I. Levenshtein, Bounds for packings on a sphere and in space. Probl. Pereda. Inf. 14, 3–25 (1978)
G. Kertész, On totally separable packings of equal balls. Acta Math. Hungar. 51(3-4), 363–364 (1988)
P. Koebe, Kontaktprobleme der konformen Abbildung. Ber. Verh. Sächs. Akad. Leipzig 88, 141–164 (1936). (German)
G. Kuberberg, O. Schramm, Average kissing numbers for non-congruent sphere packings. Math. Res. Lett. 1, 339–344 (1994)
V.N. Manoharan, Colloidal matter: packing, geometry, and entropy. Science 349, 1253751 (2015)
J.C. Maxwell, On the calculation of the equilibrium and stiffness of frames. Philos. Mag. 27, 294–299 (1864)
O.R. Musin, The kissing number in four dimensions. Ann. Math. (2) 168/1, 1–32 (2008)
A.M. Odlyzko, N.J.A. Sloane, New bounds on the number of unit spheres that can touch a unit sphere in \(n\)-dimensions. J. Comb. Theory, Ser. A 26, 210–214 (1979)
K. Schütte, B.L. Van Der Waerden, Das Problem der dreizehn Kugeln. Math. Ann. 125, 325–334 (1953)
W. Thurston, The geometry and topology of 3-manifolds, Princeton Lecture Notes (1980)
Acknowledgements
The first author is partially supported by a Natural Sciences and Engineering Research Council of Canada Discovery Grant. The second author is supported by a Vanier Canada Graduate Scholarship (NSERC), an Izaak Walton Killam Memorial Scholarship and Alberta Innovates Technology Futures (AITF). The authors would like to thank the anonymous referee for careful reading and an interesting reference.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 János Bolyai Mathematical Society and Springer-Verlag GmbH Germany, part of Springer Nature
About this chapter
Cite this chapter
Bezdek, K., Khan, M.A. (2018). Contact Numbers for Sphere Packings. In: Ambrus, G., Bárány, I., Böröczky, K., Fejes Tóth, G., Pach, J. (eds) New Trends in Intuitive Geometry. Bolyai Society Mathematical Studies, vol 27. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-57413-3_2
Download citation
DOI: https://doi.org/10.1007/978-3-662-57413-3_2
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-57412-6
Online ISBN: 978-3-662-57413-3
eBook Packages: Mathematics and StatisticsMathematics and Statistics (R0)