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 An example of large groups Bull. Korean Math. Soc.Published online July 18, 2019 AHMET SINAN CEVIK King Abdulaziz University Abstract : The fundamental idea of this article is to present an effective way to obtain the large groups in terms of the split extension obtained by a finite cyclic group and a free abelian group rank $2$. The proof of the main result on largeness property of this specific split extension groups will be given by using the connection of large groups with the groups having deficiency one presentations. Keywords : Deficiency, Efficiency, Large Groups, Presentation, Spherical pictures. MSC numbers : 20L05, 20M05, 20M15, 20M50. Full-Text :