JournalspmVol. 64, No. 1Volume 64, No. 1 (2007) Portugaliae Mathematicapp. 3–10Notes on periodic solutions of discrete steady state systemsGen-Qiang WangSui Sun Chengpp. 11–19Spectra in Banach and locally convex algebrasA. K. Gaurpp. 21–38Perfect polynomials over <strong>F</strong><sub>4</sub> with less than five prime factorsLuis H. GallardoOlivier Rahavandrainypp. 39–65Local energy decay for the nonlinear dissipative wave equation in an exterior domainMoez Daoulatlipp. 67–74Totally umbilical semi-invariant submanifolds of a nearly trans-Sasakian manifoldV. A. KhanM. A. KhanS. Uddinpp. 75–85Positive integers divisible by the product of their nonzero digitsFlorian LucaJean-Marie De Koninckpp. 87–126On the Cauchy problem for a one-dimensional compressible viscous polytropic ideal gasYuming QinYumei WuFagui Liu
pp. 21–38Perfect polynomials over <strong>F</strong><sub>4</sub> with less than five prime factorsLuis H. GallardoOlivier Rahavandrainy
pp. 39–65Local energy decay for the nonlinear dissipative wave equation in an exterior domainMoez Daoulatli
pp. 67–74Totally umbilical semi-invariant submanifolds of a nearly trans-Sasakian manifoldV. A. KhanM. A. KhanS. Uddin
pp. 75–85Positive integers divisible by the product of their nonzero digitsFlorian LucaJean-Marie De Koninck
pp. 87–126On the Cauchy problem for a one-dimensional compressible viscous polytropic ideal gasYuming QinYumei WuFagui Liu
