A class of nowhere continuous solutions of Baxter's equation.
A class of symmetric biadditive functionals.
A comparative study of functional equations characterising sine and cosine.
A conditional dilation equation.
A conditional dilation equation. (Summary).
A conjecture of Gy. Petruska.
A consistency equation for three geometries.
A contribution to a theorem of Ulam and Mazur.
A converse to the Lions-Stampacchia theorem
In this paper we show that a linear variational inequality over an infinite dimensional real Hilbert space admits solutions for every nonempty bounded closed and convex set, if and only if the linear operator involved in the variational inequality is pseudo-monotone in the sense of Brezis.
A converse to the Lions-Stampacchia Theorem
In this paper we show that a linear variational inequality over an infinite dimensional real Hilbert space admits solutions for every nonempty bounded closed and convex set, if and only if the linear operator involved in the variational inequality is pseudo-monotone in the sense of Brezis.
A correction to “Cayley's problem”, AM 35 (1990) No. 2, 140-146
A Cosine Functional Equation with Restricted Argument. (Short Communication).
A discrete equivalent of the logistic equation.
A discrete Hardy-Laptev-Weidl-type inequality and associated Schrödinger-type operators.
A discrete monetary economic growth model with the MIU approach.
A discrete predator-prey system with age-structure for predator and natural barriers for prey
We analyze a two species discrete predator-prey model in which the prey disperses between two patches of a heterogeneous environment with barriers and the mature predator disperses between the patches with no barrier. By using the discrete dynamical system generated by a monotone, concave maps for subcommunity of prey, we obtain the subcommunity of prey exists an equilibrium which attracts all positive solutions, and using the stability trichotomy results on the monotone and continuous operator,...
A discrete predator-prey system with age-structure for predator and natural barriers for prey
We analyze a two species discrete predator-prey model in which the prey disperses between two patches of a heterogeneous environment with barriers and the mature predator disperses between the patches with no barrier. By using the discrete dynamical system generated by a monotone, concave maps for subcommunity of prey, we obtain the subcommunity of prey exists an equilibrium which attracts all positive solutions, and using the stability trichotomy results on the monotone and continuous operator,...
A discrete two-sector economic growth model.
A dominant height growth model for eucalyptus plantations in Portugal
Eucalyptus globulus Labill is one of the most important economic forest species in Portugal, occupying an area of 875.10³ ha in a total forest area of 3346.10³ ha (Tomé et al., 2007). The main goal of this study is to develop a dominant height growth model for Eucalyptus, applicable throughout the country, representing an improve of the curves that are part of the whole stand model existing in Portugal, the GLOBULUS model (Tomé et al., 2001). The dominant height growth model will be built on a biological...
A family of symmetric biadditive nonbilinear functions.