On an ambiguity in the concept of partial and total derivatives in classical analysis
Ambiguity is shown in the context of the differential calculus of several variables and with the help of the language of category theory, a way to solve it in...
On metallicity distribution for planet-hosting stars
The study of stellar parameters of planet-hosting stars, such as metallicity and chemical abundances, help us to understand the theory of planet formation and...
On some uncertainties in evolutionary synthesis models
Ranging from track interpolation techniques through model atmospheres to the stochastic nature of the IMF, there are many uncertainties which need to be taken...
Solar velocity data collected at Izaña (Tenerife) over the years 1980 - 1985 have been used to search for the 160 minute oscillation. The peculiar behaviour of...