Combining constructive and equational geometric constraint solving techniques

In the past few years, there has been a strong trend towards developing parametric, computer aided design systems based on geometric constraint solving. An efective way to capture the design intent in these systems is to define relationships between geometric and technological variables. In general, geometric constraint solving including functional relationships requires a general approach and appropiate techniques toachieve the expected functional capabilities. This work reports on a hybrid method which combines two geometric constraint solving techniques: Constructive and equational. The hybrid solver has the capability of managing functional relationships between dimension variables and variables representing conditions external to the geometric problem. The hybrid solver is described as a rewriting system and is shown to be correct.Postprint (published version

The feudal partitions of Mallorca and their immediate consequences (1230-1245)

The feudal conquest of Mallorca was a technically complex and economically costly undertaking. It was the outcome of joint actions among the monarchy, the nobility and the Catalan bourgeoisie and knights and infantrymen from Aragon and other regions in the western Mediterranean. Once the island had been conquered, the participants received a part of the spoils and properties directly proportional to their contribution to the forces, which resulted in three territorial partitions. Almost all the major participants divided the lands they had received in allodium between knights and peasants in fief and in emphyteusis, respectively. The Catalans were predominant among of the first settlers of Mallorca

Els repartiments feudals de Mallorca i les seves conseqüències immediates (1230-1245)

La conquesta feudal de Mallorca va ser una empresa tècnicament complexa i econòmicament costosa. Fou el resultat d’una acció conjunta de la monarquia, la noblesa i la burgesia catalanes i de cavallers i peons aragonesos i d’altres territoris de la Mediterrània occidental. El participants, un cop conquerida l’illa, van rebre una part del botí i dels béns immobles directament proporcional a la seva aportació a la host, cosa que va provocar tres repartiments territorials. Gairebé tots els grans porcioners van repartir les terres que havien rebut en alou entre cavallers i pagesos, mitjançant concessions en feu i en emfiteusi, respectivament. Entre els primers pobladors de Mallorca preponderaren també els catalans.La conquesta feudal de Mallorca va ser una empresa tècnicament complexa i econòmicament costosa. Fou el resultat d’una acció conjunta de la monarquia, la noblesa i la burgesia catalanes i de cavallers i peons aragonesos i d’altres territoris de la Mediterrània occidental. El participants, un cop conquerida l’illa, van rebre una part del botí i dels béns immobles directament proporcional a la seva aportació a la host, cosa que va provocar tres repartiments territorials. Gairebé tots els grans porcioners van repartir les terres que havien rebut en alou entre cavallers i pagesos, mitjançant concessions en feu i en emfiteusi, respectivament. Entre els primers pobladors de Mallorca preponderaren també els catalans

Per una anàlisi sobre el turisme massiu i el medi natural a l'illa de Mallorca

This paper was prepared on the occasion of the VII Premi Catalunya dEconomia. Since Hotelling outlined the travel cost method, the literature has given several models to enrich and improve the travel cost method. Infact, one of the aims of this paper is to present a discrete choice model that will be used to estimate the demand of the recreational services provided by some natural areas in Majorca. The model predicts both whether the individual will take part in these recreational activities and how often he will participate in terms of his socio-economic characteristícs, the costs of producing the different options and the attributes of the areas. Starting from this relationship, the effects that changes in the access conditions and environmental quality have on the individual welfare can be calculated

Bartomeu Rosselló-Pòrcel i Salvador Espriu: dos amics de vint anys

Abstract not availabl