JournalspmVol. 64 , No. 1Portugaliae MathematicaVolume. 64 , No. 1 2007DOI: 10.4171/pm | ISSN: 0032-5155 | eISSN: 1662-2758Notes on periodic solutions of discrete steady state systemsGen-Qiang WangSui Sun Chengpp. 3–10Spectra in Banach and locally convex algebrasA. K. Gaurpp. 11–19Perfect polynomials over <strong>F</strong><sub>4</sub> with less than five prime factorsLuis H. GallardoOlivier Rahavandrainypp. 21–38Local energy decay for the nonlinear dissipative wave equation in an exterior domainMoez Daoulatlipp. 39–65Totally umbilical semi-invariant submanifolds of a nearly trans-Sasakian manifoldV. A. KhanM. A. KhanS. Uddinpp. 67–74Positive integers divisible by the product of their nonzero digitsFlorian LucaJean-Marie De Koninckpp. 75–85On the Cauchy problem for a one-dimensional compressible viscous polytropic ideal gasYuming QinYumei WuFagui Liupp. 87–126

Perfect polynomials over <strong>F</strong><sub>4</sub> with less than five prime factorsLuis H. GallardoOlivier Rahavandrainypp. 21–38

Local energy decay for the nonlinear dissipative wave equation in an exterior domainMoez Daoulatlipp. 39–65

Totally umbilical semi-invariant submanifolds of a nearly trans-Sasakian manifoldV. A. KhanM. A. KhanS. Uddinpp. 67–74

Positive integers divisible by the product of their nonzero digitsFlorian LucaJean-Marie De Koninckpp. 75–85

On the Cauchy problem for a one-dimensional compressible viscous polytropic ideal gasYuming QinYumei WuFagui Liupp. 87–126