Abstract
It is known that semigroups are Ramsey algebras. This paper is an attempt to understand the role associativity plays in a binary system being a Ramsey algebra. Specifically, we show that the nonassociative Moufang loop of octonions is not a Ramsey algebra.
Similar content being viewed by others
References
Baez J C, The octonions, Bull. Am. Math. Soc. 39 (2002) 145–205
Carlson T J, Some unifying principles in Ramsey theory, Discrete Math. 68(2) (1988) 117–169
Ellentuck E, A new proof that analytic sets are Ramsey, J. Symb. Log. 39(01) (1974) 163–165
Galvin F and Prikry K, Borel sets and Ramsey’s theorem, J. Symb. Log. 38(02) (1973) 193–198
Hindman N, Finite sums from sequences within cells of a partition of N, J. Comb. Theory Ser. A, 17 (1974) 1–11
Milliken K R, Ramsey’s theorem with sums or unions, J. Comb. Theory Ser. A, 18(3) (1975) 276–290
Preparata F P, On the representation of integers in nonadjacent form, SIAM J. Appl. Math., 21(4) (1971) 630–635
Schafer R D, An introduction to nonassociative algebras, vol. 22 (1966) (North Chelmsford: Courier Corporation)
Silver J, Every analytic set is Ramsey, J. Symb. Log. 35(01) (1970) 60–64
Teh W C, Ramsey algebras, J. Math. Log. 16(2) (2016) 16 pp.
Teh W C, Ramsey algebras, Ph.D. Thesis (2013) (The Ohio State University)
Teh W C, Ramsey algebras and formal orderly terms, Notre Dame J. Form. Log. 58(1) (2017) 115–125
Teh W C, Ramsey algebras and strongly reductible ultrafilters, Bull. Malays. Math. Sci. Soc. 37(4) (2014) 931–938
Teh W C, Ramsey algebras and the existence of idempotent ultrafilters, Arch. Math. Log. 55(3) (2016) 475–491
Teh W C, Ramsey orderly algebra, arXiv:1511.06048 [math.LO]
Teoh Z Y and Teh W C, Heterogeneous Ramsey algebras and classification of Ramsey vector spaces, http://arXiv.org/abs/1603.09489v2
Acknowledgements
This work grows out of Zu Yao Teoh’s research in the doctoral program at Universiti Sains Malaysia. The second and third authors gratefully acknowledge the support of the Fundamental Research Grant Scheme No. 203/PMATHS/6711464 of the Ministry of Education, Malaysia, and Universiti Sains Malaysia. Special thanks also go to the School of Mathematical Sciences’ postgraduate allocation fund of Universiti Sains Malaysia as well as the Centre International de Mathématiques Pures et Appliquées (CIMPA) for their financial supports in making attending the AMC 2016 possible for Zu Yao Teoh.
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicating Editor: B Sury
Rights and permissions
About this article
Cite this article
Rajah, A., Teh, W.C. & Teoh, Z.Y. Role of associativity in Ramsey algebras. Proc Math Sci 127, 769–778 (2017). https://doi.org/10.1007/s12044-017-0359-y
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12044-017-0359-y
Keywords
- Binary systems
- Ramsey algebras
- octonions
- semigroups
- associativity
- nonassociative Moufang loops
- alternative algebras