Send mail to me at: jmbo@pq.cnpq.br

           


ACKNOWLEDGEMENT
I would like to seize the oportunity to thank
Instituto do Milênio, AGIMB - Avanco Global e Integrado da Matemática Brasileira,
CAPES,  CNPqUNICAMP and UFPB for the financial support they have given me. 
                        
 
Disclaimer:
The contents of this page reflect solely the opinions of the author who originated it. It has not been reviewed by, nor is it a publications of the Federal University of Paraíba