Search

Clathrus crispus, C. chrysomycelinus and Phallus indusiatus are recorded for the first time from Paraguay. In addition, the distribution of the species Mutinus argentinus is extended. The distinctive macroscopic and microscopic morphological characteristics of each species is described. Photographs of the fresh materials are attached along with comments about the taxonomy and distribution of each species. [ABSTRACT FROM AUTHOR]

We consider convex optimization problems with uncertain, probabilistically described, constraints. In this context, scenario optimization is a well recognized methodology where a sample of the constraints is used to describe uncertainty. One says that the scenario solution generalizes well, or has a high robustness level, if it satisfies most of the other constraints besides those in the sample. Over the past 10 years, the main theoretical investigations on the scenario approach have related the robustness level of the scenario solution to the number of optimization variables. This paper breaks into the new paradigm that the robustness level is a-posteriori evaluated after the solution is computed and the actual number of the so-called support constraints is assessed (wait-and-judge). A new theory is presented which shows that a-posteriori observing k support constraints in dimension $$d > k$$ allows one to draw conclusions close to those obtainable when the problem is from the outset in dimension k. This new theory provides evaluations of the robustness that largely outperform those carried out based on the number of optimization variables. [ABSTRACT FROM AUTHOR]

Battarrea phalloides (Basidiomycota, Agaricomycetes) new for the Paraguayan chaco. Bol. Soc. Micol. Madrid 41:47–51. Battarrea phalloides, is described macro and microscopically, it is the first record for the region of Boquerón, Chaco seco, Paraguay. Photographs of basidioma, elaters and spores are incorporated. [ABSTRACT FROM AUTHOR]