Submitted on: 18 December 2019.
Revised on: 25 February 2020.
Accepted on: 12 April 2020.
___________________Journal of Mathematical Physics Analysis Geometry
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Submitted on: 23 December 2011.
Revised on: 13 April 2012.
Accepted on: 22 May 2012.
___________________Journal of Mathematical Physics Analysis Geometry
Submitted on: 10 December 1999.
Revised on: 02 February 2000.
Accepted on: 27 February 2000.
___________________Journal of Mathematical Physics Analysis Geometry
Submitted on: 30 June 2010.
Revised on: 06 September 2010.
Accepted on: 05 October 2010.
___________________Journal of Mathematical Physics Analysis Geometry
Submitted on: 08 February 2012.
Revised on: 07 April 2012.
Accepted on: 09 May 2012.
___________________Journal of Mathematical Physics Analysis Geometry