



\author{A. C. Gurgel\thanks{The ANP supports the work of the author through the prh22 project.}\inst{1}, V. G. Medeiros Jr.\inst{2}, M. V. M. Oliveira\inst{1} and D. B. P. D\'{e}harbe\inst{1}}

\institute{Departamento de Inform\'{a}tica e Matem\'{a}tica Aplicada, UFRN,
Brazil\\%
\and
Instituto Federal de Educa\c{c}\~{a}o, Ci\^{e}ncia e Tecnologia, IFRN, Brazil}

INSTEAD OF


\author{A. C. Gurgel\thanks{The ANP supports the work of the author through the prh22 project.}, V. G. Medeiros Jr., M. V. M. Oliveira and D. B. P. D\'{e}harbe}

\institute{Departamento de Inform\'{a}tica e Matem\'{a}tica Aplicada, UFRN,
Brazil}