Norbert Sauer

Norbert Sauer

Contact information

Background

Educational Background

PhD University of Vienna, 1966

Research

Areas of Research

Set theory, Universal algebra, Graph theory, Theory of homogeneous structures, Partially ordered sets, Relational structures, Ramsey theory

More Information

Books

  • Sauer, Norbert. Coloring finite substructures of countable structures 11. J\'anos Bolyai Math. Soc., 2002. 525-553. Print.
  • Wang, Hong and Sauer, Norbert. The chromatic number of the two-packing of a forest 14. Springer, 1997. 99-120. Print.
  • Imrich, Wilfried, Sauer, Norbert and Woess, Wolfgang. The average size of nonsingular sets in a graph 411. Kluwer Acad. Publ., 1993. 199-205. Print.
  • Sauer, Norbert. Vertex partition problems , J\'anos Bolyai Math. Soc., 1993. 361-377. Print.
  • Sauer, Norbert and Zhu, X.. Graphs which do not embed a given graph and the {R}amsey property 60. North-Holland, 1992. 631-636. Print.
  • Sauer, Norbert and El-Zahar, M.. Partition theorems for graphs respecting the chromatic number 301. Kluwer Acad. Publ., 1990. 237-242. Print.
  • Sauer, Norbert and Stone, Mike. Preemptive scheduling Kluwer Acad. Publ., 1989. 307-323. Print.
  • Sauer, Norbert and Stone, Mike. A characterization of extendible lattices H\"older-Pichler-Tempsky, 1988. 243-246. Print.
  • Sauer, Norbert and Stone, Mike. Indigenous relations in categories of sets H\"older-Pichler-Tempsky, 1987. 313-320. Print.
  • Sauer, Norbert and Stone, Mike. Monoids and their local closures 43. North-Holland, 1986. 455-467. Print.
  • Sauer, Norbert and Stone, Mike. Extendible lattices H\"older-Pichler-Tempsky, 1985. 331-334. Print.
  • Koh, K. M. and Sauer, Norbert. Concentric subgraphs, closed subsets and dense graphs 1073. Springer, 1984. 100-118. Print.
  • Sauer, Norbert, Stone, Mike and Weedmark, R. H.. Every finite algebra with congruence lattice {$M\sb{7}$} has principal congruences 1004. Springer, 1983. 273-292. Print.
  • Sauer, Norbert and Stone, Mike. A {G}alois correspondence between algebras and endomorphisms 29. North-Holland, 1982. 691-695. Print.
  • Sauer, Norbert. The largest number of edges of a graph such that not more than {$g$}\ intersect in a point or more than {$n$} are independent Academic Press, 1971. 253-257. Print.
  • Sauer, Norbert. On the factorization of {$n$}-graphs North-Holland, 1970. 981-995. Print.
  • Kuich, W. and Sauer, Norbert. On the existence of certain minimal regular {$n$}-systems with given girth Academic Press, 1969. 93-101. Print.

Conference proceedings

  • Sauer, Norbert. Age and weak indivisibility 2008.

Forthcoming

  • Nguyen Van Thé, Lionel and Sauer, Norbert. The Urysohn sphere is oscillation stable (updated version). 2007.

Journal article

  • Laflamme, Claude, Pouzet, Maurice and Sauer, Norbert. "Invariant subsets of scattered trees and the tree alternative property of Bonato and Tardif". Abhandlungen Math. Sem. Univ. Hamburg Volume in memory of Rudolf Halin. (2017): 1-40. Print.
  • Laflamme, Claude, Sauer, Norbert and Dobrinen, Natasha. "Rainbow Ramsey simple structures". Discrete Mathematics 339.11 (2016): 2848-2855. Print.
  • Laflamme, Claude, Sauer, Norbert, Pouzet, Maurice and Zaguia, Imed. "Pairs of orthogonal countable ordinals". Discrete Mathematics 335. (2015): 35-44. Print.
  • Sauer, Norbert. "Age and weak indivisibility". European Journal of Combinatorics, (2015). Print.
  • Sauer, Norbert, P. Komjath and J. Larson. "The Quasiorder of Graphs on an Ordinal". Discrete Mathematics 311. (2015): 151-146. Print.
  • Sauer, Norbert. "Distance sets of Urysohn metric spaces". Canadian Journal of Mathematics 65.1 (2013): 220-240. Print.
  • Sauer, Norbert. "Oscillation of Urysohn Type Spaces". Asymptotic Geometric Analyis, Fields Institute Communications 68. (2013): 247-270. Print.
  • Sauer, Norbert. "Vertex partitions of metric spaces with finite distance sets". Discrete Mathematics 312.1 (2012): 119-128. Print.
  • Sauer, Norbert. "On the General Coloring Problem". Lecture Notes in Computer Science 6570. (2011): 116-126. Print.
  • Sauer, Norbert and I. Zaguia. "The order of the rationals has an Orthogonal Order with the Same Order Type". Order 28. (2011): 377-385. Print.
  • Laflamme, Claude, Nguyen Van Thé, Lionel and Sauer, Norbert. "Distinguishing Number of Countable Homogeneous Relational Structures". Electronic Journal of Combinatorics 16(1). (2010). Print.
  • Laflamme, Claude, Nguyen Van Thé, Lionel and Sauer, Norbert. "Partition properties of the dense local order and a colored version of Milliken's theorem.". Combinatorica 30.1 (2010): 83-104. Print.
  • Delhommé, Christian, Pouzet, Maurice, Sagi, Gabor and Sauer, Norbert. "Representation of ideals of relational structures". Discrete Mathematics 309.6 (2009): 1374-1384. Print.
  • Laflamme, Claude, Nguyen Van Thé, Lionel, Pouzet, Maurice and Sauer, Norbert. "Partitions and Indivisibility Properties of Countable Dimensional Vector Spaces". Jour. Comb. Theory, Series A 118.1 (2009): 67-77. Print.
  • Delhomme, Christian, Laflamme, Claude, Pouzet, Maurice and Sauer, Norbert. "Indivisible ultrametric spaces.". Topology Appl. 155.14 (2008): 1462–1478. Print.
  • Nguyen Van Thé, Lionel and Sauer, Norbert. "The Urysohn sphere is oscillation stable". GAFA (Geometric and Functional Analysis) (to appear), Print.
  • Nguyen Van Thé, Lionel and Sauer, Norbert. "Some weak indivisibility results in ultrahomogeneous metric spaces". submitted, (2008). Print.
  • Delhomme, Christian, Laflamme, Claude, Pouzet, Maurice and Sauer, Norbert. "Divisibility of countable metric spaces". European Journal of Combinatorics 28. (2007): 1746-1749. Print.
  • Sauer, Norbert. "Coloring subgraphs of the Rado graph". Combinatorica. An International Journal on Combinatorics and the Theory of Computing 26.2 (2006): 231-253. Print.
  • Sauer, Norbert. "Coloring subgraphs of the Rado graph". Combinatorica. An International Journal on Combinatorics and the Theory of Computing 26.2 (2006): 231-253. Print.
  • Sauer, Norbert. "Coloring subgraphs of the Rado graph". Combinatorica. An International Journal of the J\'anos Bolyai Mathematical Society 26.2 (2006). Print.
  • Sauer, Norbert, Sands, Bill, Duffus, Dwight and V. Rodl. "Chromatic numbers and homomorphisms of large girth hypergraphs". Algorithms and Combinatorics, Topics in Discrete Mathematics 26. (2006): 455-471. Print.
  • Pouzet, Maurice and Sauer, Norbert. "From well quasi-ordered sets to better quasi-ordered sets". The Electronic Journal of Combinatorics 13.1-3 (2006): 27. Print.
  • Sauer, Norbert and El-Zahar. "Indivisible homogeneous directed graphs and a game for vertex partitions". Discrete Math. 291.1-3 (2005): 99-113. Print.
  • Sauer, Norbert and M. El-Zahar. "Indivisible homogeneous directed graphs and a game for vertex partitions". Discrete Math. 291.1-3 (2005): 99-113. Print.
  • Duffus, Dwight and Sauer, Norbert. "Chromatic numbers and products". Discrete Math. 300.1-3 (2005): 91-99. Print.
  • Laflamme, Claude and Sauer, Norbert. "Canonical partitions of universal structures". Combinatorica. An International Journal on Combinatorics and the Theory of Computing 26.2 (2004): 183-205. Print.
  • Sauer, Norbert. "Canonical vertex partitions". Combinatorics, Probability and Computing 12.5-6 (2003): 671-704. Print.
  • Sauer, Norbert. "A {R}amsey theorem for countable homogeneous directed graphs". Discrete Math. 253.1-3 (2002): 45-61. Print.
  • Laviolette, Fran, Sauer, Norbert and Woodrow, Robert. "On cop-win graphs". Discrete Math. 258.1-3 (2002): 27-41. Print.
  • Delhomm{\'e}, Christian and Sauer, Norbert. "Homomorphisms of products of graphs into graphs without four cycles". Combinatorica. An International Journal of the J\'anos Bolyai Mathematical Society 22.1 (2002): 35-46. Print.
  • Kuich, Werner, Sauer, Norbert and Urbanek, Friedrich. "Heyting algebras and formal languages". J.UCS. The Journal of Universal Computer Science 8.7 (2002): 722-736 (electronic). Print.
  • Sauer, Norbert. "Hedetniemi's Conjecture-a survey". Discrete Math. 229.1-3 (2001): 261-292. Print.
  • Sauer, Norbert. "Hedetniemi's conjecture-a survey". Discrete Math. 229.1-3 (2001): 261-292. Print.
  • Sauer, Norbert. "Another look at the {E}rd{\H o}s-{H}ajnal-{P}\'osa results on partitioning edges and the {R}ado graph". Combinatorica. An International Journal of the J\'anos Bolyai Mathematical Society 21.2 (2001): 293-308. Print.
  • Kuich, Werner and Sauer, Norbert. "Atoms and partial orders of infinite languages". Theoretical Informatics and Applications. Informatique Th\'eorique et Applications 35.4 (2001): 389-401. Print.
  • Delhomm{\'e}, Christian, Pouzet, Maurice and Sauer, Norbert. "Jump-number of means on graphs". European Journal of Combinatorics 21.6 (2000): 767-775. Print.
  • Sauer, Norbert. "Edge partitions of the countable triangle free homogeneous graph". Discrete Math. 185.1-3 (1998): 137-181. Print.
  • Sauer, Norbert, Woodrow, Robert and R{\"o}dl, Vojtech. "Chromatic {R}amsey theory". European Journal of Combinatorics 18.1 (1997): 93-102. Print.
  • Duffus, Dwight and Sauer, Norbert. "Lattices arising in categorial investigations of {H}edetniemi's conjecture". Discrete Math. 152.1-3 (1996): 125-139. Print.
  • Pouzet, Maurice and Sauer, Norbert. "Edge partitions of the {R}ado graph". Combinatorica. An International Journal of the J\'anos Bolyai Mathematical Society 16.4 (1996): 505-520. Print.
  • Sauer, Norbert and {\v{S}}ir{\'a}{\v{n}}, Jozef. "The chromatic number of the union of two forests". Ars Combinatoria 42. (1996): 161-174. Print.
  • Wang, Hong and Sauer, Norbert. "Packing of three copies of a graph". Journal of Graph Theory 21.1 (1996): 71-80. Print.
  • Sauer, Norbert. "On the {R}amsey property of families of graphs". Transactions of the American Mathematical Society 347.3 (1995): 785-833. Print.
  • R{\"o}dl, V., Sauer, Norbert and Zhu, X.. "Ramsey families which exclude a graph". Combinatorica. An International Journal of the J\'anos Bolyai Mathematical Society 15.4 (1995): 589-596. Print.
  • El-Zahar, M. and Sauer, Norbert. "On the divisibility of homogeneous hypergraphs". Combinatorica. An International Journal of the J\'anos Bolyai Mathematical Society 14.2 (1994): 159-165. Print.
  • P{\"o}schel, R., Sapir, M. V., Sauer, Norbert, Stone, Mike and Volkov, M. V.. "Identities in full transformation semigroups". Algebra Universalis 31.4 (1994): 580-588. Print.
  • Droste, Manfred, Giraudet, Mich, Macpherson, Dugald and Sauer, Norbert. "Set-homogeneous graphs". Journal of Combinatorial Theory. Series B 62.1 (1994): 63-95. Print.
  • Wang, Hong and Sauer, Norbert. "Packing three copies of a tree into a complete graph". European Journal of Combinatorics 14.2 (1993): 137-142. Print.
  • Hajnal, A. and Sauer, Norbert. "Cut-sets in infinite graphs and partial orders". Discrete Math. 117.1-3 (1993): 113-125. Print.
  • Boroczky, K., Sauer, Norbert and Zhu, X.. "Inexhaustible homogeneous structures". Discrete Math. 115.1-3 (1993): 57-63. Print.
  • El-Zahar, M. and Sauer, Norbert. "On the divisibility of homogeneous directed graphs". Canadian Journal of Mathematics. Journal Canadien de Math\'ematiques 45.2 (1993): 284-294. Print.
  • Kaiser, H. K. and Sauer, Norbert. "On order polynomially complete lattices". Algebra Universalis 30.2 (1993): 171-176. Print.
  • Gunderson, David, R{\"o}dl, Vojt and Sauer, Norbert. "Finite induced graph {R}amsey theory: on partitions of subgraphs". Journal of Combinatorial Theory. Series B 59.2 (1993): 199-209. Print.
  • Duffus, Dwight, R{\"o}dl, V., Sauer, Norbert and Woodrow, Robert. "Coloring ordered sets to avoid monochromatic maximal chains". Canadian Journal of Mathematics. Journal Canadien de Math\'ematiques 44.1 (1992): 91-103. Print.
  • R{\"o}dl, V. and Sauer, Norbert. "The {R}amsey property for families of graphs which exclude a given graph". Canadian Journal of Mathematics. Journal Canadien de Math\'ematiques 44.5 (1992): 1050-1060. Print.
  • Hor{\'a}k, Peter and Sauer, Norbert. "Covering complete graphs by cliques". Ars Combinatoria 33. (1992): 279-288. Print.
  • Sauer, Norbert and Zhu, X.. "An approach to {H}edetniemi's conjecture". Journal of Graph Theory 16.5 (1992): 423-436. Print.
  • Sauer, Norbert and Zhu, Xu. "Multiplicative posets". Order 8.4 (1991/92): 349-358. Print.
  • Pach, J. and Sauer, Norbert. "On the average volume of subsets in {E}uclidean {$d$}-space". European Journal of Combinatorics 12.5 (1991): 417-421. Print.
  • El-Zahar, M. and Sauer, Norbert. "Ramsey-type properties of relational structures". Discrete Math. 94.1 (1991): 1-10. Print.
  • Duffus, Dwight, Sands, Bill, Sauer, Norbert and Woodrow, Robert. "Two-colouring all two-element maximal antichains". Journal of Combinatorial Theory. Series A 57.1 (1991): 109-116. Print.
  • Sauer, Norbert and Stone, Mike. "Composing functions to reduce image size". Ars Combinatoria 31. (1991): 171-176. Print.
  • Sauer, Norbert and Stone, Mike. "Endomorphism monoids of algebras whose subalgebra lattices are chains". Algebra Universalis 28.2 (1991): 214-229. Print.
  • Sauer, Norbert and Stone, Mike. "On a problem of {B}. {J}\'onsson concerning subalgebras and endomorphisms". Algebra Universalis 27.3 (1990): 385-386. Print.
  • Gunderson, David, R{\"o}dl, Vojt and Sauer, Norbert. "Some results in finite graph {R}amsey theory". Congressus Numerantium. A Conference Journal on Numerical Themes 79. (1990): 232-243. Print.
  • Sauer, Norbert and Stone, Mike. "Foliations and applications to structure problems". Acta Mathematica Hungarica 53.1-2 (1989): 43-54. Print.
  • Sauer, Norbert and Stone, Mike. "Preemptive scheduling of interval orders is polynomial". Order 5.4 (1989): 345-348. Print.
  • El-Zahar, M. and Sauer, Norbert. "The indivisibility of the homogeneous {$K\sb n$}-free graphs". Journal of Combinatorial Theory. Series B 47.2 (1989): 162-170. Print.
  • El-Zahar, M. and Sauer, Norbert. "Asymptotic enumeration of two-dimensional posets". Order 5.3 (1988): 239-244. Print.
  • Duffus, Dwight and Sauer, Norbert. "Fixed points of products and the strong fixed point property". Order 4.3 (1987): 221-231. Print.
  • Sauer, Norbert and Stone, Mike. "Rational preemptive scheduling". Order 4.2 (1987): 195-206. Print.
  • Bialostocki, A. and Sauer, Norbert. "On {R}amsey-{T}ur\'an type problems in tournaments". Discrete Math. 59.3 (1986): 221-228. Print.
  • Hajnal, A. and Sauer, Norbert. "Complete subgraphs of infinite multipartite graphs and antichains in partially ordered sets". Discrete Math. 59.1-2 (1986): 61-67. Print.
  • El-Zahar, M. and Sauer, Norbert. "The chromatic number of the product of two {$4$}-chromatic graphs is {$4$}". Combinatorica. An International Journal of the J\'anos Bolyai Mathematical Society 5.2 (1985): 121-126. Print.
  • El-Zahar, Mohamed and Sauer, Norbert. "The length, the width and the cutset-number of finite ordered sets". Order 2.3 (1985): 243-248. Print.
  • Sauer, Norbert and Woodrow, Robert. "Finite cutsets and finite antichains". Order 1.1 (1984): 35-46. Print.
  • Sands, Bill, Sauer, Norbert and Woodrow, Robert. "On monochromatic paths in edge-coloured digraphs". Journal of Combinatorial Theory. Series B 33.3 (1982): 271-275. Print.
  • Milner, E. C. and Sauer, Norbert. "Remarks on the cofinality of a partially ordered set, and a generalization of {K}\"onig's lemma". Discrete Math. 35. (1981): 165-171. Print.
  • Milner, E. C. and Sauer, Norbert. "On chains and antichains in well-founded partially ordered sets". Journal of the London Mathematical Society. Second Series 24.1 (1981): 15-33. Print.
  • Birkenhead, R., Sauer, Norbert and Stone, Mike. "The algebraic representation of semigroups and lattices;\ representing lattice extensions". Acta Universitatis Szegediensis. Acta Scientiarum Mathematicarum 43.3-4 (1981): 255-261. Print.
  • Sauer, Norbert and Stone, Mike. "The algebraic representation of semigroups and lattices;\ representing subsemigroups". Acta Universitatis Szegediensis. Acta Scientiarum Mathematicarum 42.3-4 (1980): 313-323. Print.
  • Sauer, Norbert and Spencer, Joel. "Edge disjoint placement of graphs". Journal of Combinatorial Theory. Series B 25.3 (1978): 295-302. Print.
  • T{\'o}th, L. and Sauer, Norbert. "Thinnest packing of cubes with a given number of neighbours". Canadian Mathematical Bulletin. Bulletin Canadien de Math\'ematiques 20.4 (1977): 501-507. Print.
  • Sauer, Norbert and Stone, Mike. "Endomorphism and subalgebra structure; a concrete characterization". Acta Universitatis Szegediensis. Acta Scientiarum Mathematicarum 39.3-4 (1977): 397-402. Print.
  • Sauer, Norbert and Stone, Mike. "The algebraic closure of a function". Algebra Universalis 7.3 (1977): 295-306. Print.
  • Sauer, Norbert and Stone, Mike. "The algebraic closure of a semigroup of functions". Algebra Universalis 7.2 (1977): 219-233. Print.
  • Bollob{\'a}s, B and Sauer, Norbert. "Uniquely colourable graphs with large girth". Canadian Journal of Mathematics. Journal Canadien de Math\'ematiques 28.6 (1976): 1340-1344. Print.
  • Erd{\H{o}}s, Paul, Sauer, Norbert, Schaer, Jonathan and Spencer, Joel. "Factorizing the complete graph into factors with large star number". J. Combinatorial Theory Ser. B 18. (1975): 180-183. Print.
  • Sauer, Norbert and Schaer, Jonathan. "On the factorization of the complete graph". J. Combinatorial Theory Ser. B 14. (1973): 1-6. Print.
  • Sauer, Norbert. "On the density of families of sets". J. Combinatorial Theory Ser. A 13. (1972): 145-147. Print.
  • Abbott, H. L., Hanson, D. and Sauer, Norbert. "Intersection theorems for systems of sets". J. Combinatorial Theory Ser. A 12. (1972): 381-389. Print.
  • Sauer, Norbert. "On the maximal number of edges in graphs with a given number of edge-disjoint triangles". Journal of the London Mathematical Society. Second Series 4. (1971): 153-156. Print.
  • Sauer, Norbert. "A generalization of a theorem of {T}ur\'an". J. Combinatorial Theory Ser. B 10. (1971): 109-112. Print.
  • Sauer, Norbert. "On the factorisation of the complete graph into factors of diameter {$2$}". J. Combinatorial Theory 9. (1970): 423-426. Print.
  • Sauer, Norbert. "On the existence of regular {$n$}-graphs with given girth". J. Combinatorial Theory 9. (1970): 144-147. Print.
  • Milner, E. C. and Sauer, Norbert. "Generalizations of a lemma of {F}olkman". Ann. New York Acad. Sci. 175. (1970): 295-307. Print.
  • Sauer, Norbert and Sch{\"o}nheim, J.. "Maximal subsets of a given set having no triple in common with a {S}teiner triple system on the set". Canadian Mathematical Bulletin. Bulletin Canadien de Math\'ematiques 12. (1969): 777-778. Print.
  • Sauer, Norbert. "Extremal point and edge sets in {$n$}-graphs". Canadian Journal of Mathematics. Journal Canadien de Math\'ematiques 21. (1969): 1069-1075. Print.
  • Sauer, Norbert. "Extremaleigenschaften regul\"arer {G}raphen gegebener {T}aillenweite. {I}, {II}". \"Osterreich. Akad. Wiss. Math.-Natur. Kl. S.-B. II 176 (1967), 9-25; ibid. 176. (1967): 27-43. Print.

Preprint

  • Nguyen Van Thé, Lionel and Sauer, Norbert. "The Urysohn sphere is oscillation stable". , (2007). Print.