New York Journal of Mathematics
Volume 21 (2015) 601-613

  

Tanushree Biswas, Dibyendu De, and Ram Krishna Paul

Matrices centrally image partition regular near 0

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Published: July 20, 2015
Keywords: Central sets near 0, algebra in the Stone-Čech compactification, image partition regularity of matrices.
Subject: Primary 05D10, Secondary 22A15, 54H13

Abstract
Hindman and Leader first investigated Ramsey theoretic properties near 0 for dense subsemigroups of (R, +). Following them, the notion of image partition regularity near zero for matrices was introduced by De and Hindman. It was also shown there that like image partition regularity over N, the main source of infinite image partition regular matrices near zero are Milliken-Taylor matrices. But except for constant multiples of the Finite Sum matrix, no other Milliken-Taylor matrices have images in central sets. In this regard the notion of centrally image partition regular matrices were introduced. In the present paper we propose the notion of matrices that are centrally image partition regular matrices near zero for dense subsemigroups of (R, +) and show that for infinite matrices these may be different from centrally image partition regular matrices, unlike the situation for finite matrices.

Author information

Tanushree Biswas:
Department of Mathematics, University of Kalyani, Kalyani-741235, West Bengal, India
tanushreebiswas87@gmail.com

Dibyendu De:
Department of Mathematics, University of Kalyani, Kalyani-741235, West Bengal, India
dibyendude@klyuniv.ac.in

Ram Krishna Paul:
Department of Mathematics, Nagaland University, Lumami-798627, Nagaland, India
rmkpaul@gmail.com