Submitted on: 06 May 2023.
Revised on: 18 June 2023.
Accepted on: 14 July 2023.
PROCEEDINGS OF THE ROYAL SOCIETY OF EDINBURGH SECTION A-MATHEMATICS
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Submitted on: 05 January 2016.
Revised on: 19 January 2016.
Accepted on: 15 February 2016.
PROCEEDINGS OF THE ROYAL SOCIETY OF EDINBURGH SECTION A-MATHEMATICS
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Submitted on: 04 December 2004.
Revised on: 11 December 2004.
Accepted on: 30 December 2004.
PROCEEDINGS OF THE ROYAL SOCIETY OF EDINBURGH SECTION A-MATHEMATICS