JournalspmVol. 64, No. 3

Volume 64, No. 3 (2007)

Portugaliae Mathematica

Port. Math. cover

pp. 255–279
A monotone method for fourth order boundary value problems involving a factorizable linear operator
P. HabetsMargarita Ramalho
DOI 10.4171/PM/1786
pp. 281–301
Homoclinic solutions of a fourth-order travelling wave ODE
Gheorghe MoroșanuDiko SouroujonStepan Tersian
DOI 10.4171/PM/1787
pp. 303–309
The Tutte polynomial of a morphism of matroids 4. Computational complexity
Michel Las Vergnas
DOI 10.4171/PM/1788
pp. 311–376
Simplicity of Lyapunov spectra: a sufficient criterion
Artur AvilaMarcelo Viana
DOI 10.4171/PM/1789