MAXIMAL GRAPHICAL REALIZATION OF A TOPOLOGY

Authors

  • Ullas Thomas S. B. College Changanassery
  • Sunil C Mathew Deva Matha College Kuravilangad

DOI:

https://doi.org/10.22199/issn.0717-6279-5696

Keywords:

Set-indexer; topology; t-set-graceful; optimal space.

Abstract

Given a topological space, the graphical realizations of it with as many edges as possible, called maximal graphical realizations, are studied here. Every finite topological space admits a maximal graphical realization. However, there are graphs which are not maximal graphical realizations of any topology. A tree of odd order is never a maximal graphical realization of a topological space. Maximal graphical realization of a topology is a cycle if and only if it is C_3. It is shown that chain topologies admit unique maximal graphical realizations. A lower bound for the size of a maximal graphical realization is also obtained.

Author Biography

Ullas Thomas, S. B. College Changanassery

Assistant Professor in Mathematics

References

Acharya B D, Set valuations of a graph and their applications. MRI Lecture Notes in

Applied Mathematics No.2, Mehta Research Institute, Allahabad, (1983).

Acharya B D, Set valuations of graphs and their applications. Proc. Sympos. on Op-

timization, Design of Experiments and Graph Theory I.I.T. Bombay (1986) 231-238.

Hegde S M, On set valuations of graphs, Nat. Acad. Sci. Letters 14(4) (1991) 181-182.

Hegde S M, On set colourings of graphs, Eur. J. Comb. 30(4) (2009) 986-995.

E. Cech, Topological Spaces (1966) Wiley.

Mathew S C and Thomas U, Strongly t-set graceful graphs, Graph Theory Notes N.

Y. LXII (2012) 17-28.

Mollard M and Payan C, On two conjectures about set-graceful graphs, European J.

Combin. 10 (1989) 185-187.

Princy K L, Some Studies on Set Valuation of Graphs-Embedding and NP Complete-

ness, (2007) Ph. D. Thesis, Kannur University.

Shiu W C and Lam P C B, Super-edge-graceful labelings of multi-level wheel graphs,

fan graphs and actinia graphs, Congr. Numer. 174 (2005) 49-63.

Thomas U and Mathew S C, On set-indexers of paths, cycles and certain related

graphs, Discrete Math. Algorithms Appl. 4(3) (2012) 1250025 (12 pages).

Thomas U and Mathew S C, On topological set indexers of graphs, Adv. Appl. Discrete

Math. 5(2) (2010) 115-130.

Thomas U and Mathew S C, Topologically set-graceful stars, paths and related graphs,

South Asian J. Math. 2(4) (2012) 392-408.

Thomas U and Mathew S C, Graphical realization of a topology, J. Adv. Res. Pure

Math. 5(3) (2013) 73-87.

Thomas U and Mathew S C, On Set-Indexers of Graphs, Palestine Journal of Mathe-

matics 3(2)(2014) 273-280.

Thomas U and Mathew S C, On topological numbers of graphs, Novi Sad J. Math. 45

(2) (2015) 85-95.

Stong R E, Finite topological spaces, Trans. Amer. Math. Soc. 123(2) (1966) 325-340.

Willard S, General Topology (1970) Addison-Wesley.

Published

2024-04-03

How to Cite

[1]
U. Thomas and S. C Mathew, “MAXIMAL GRAPHICAL REALIZATION OF A TOPOLOGY”, Proyecciones (Antofagasta, On line), vol. 43, no. 2, pp. 365-382, Apr. 2024.

Issue

Section

Artículos