This is the solution to the Trapezoids divertimento. The fun Given two positive integers \(a\) and \(b\), the relations existing between their different Pythagorean means (arithmetic, geometric and harmonic) and their quadratic mean are well known, […]
Many aspects of the mechanisms of infection of the SARS-CoV-2 coronavirus are still unknown, as it is a new pathogen for our species. Undoubtedly, the large amount of information that reaches us during the confinement […]
26 April 2020 marks the 100th anniversary of the death of the brilliant Indian mathematician Srinivasa Ramanujan who, with minimal academic education, made extraordinary contributions to mathematical analysis, number theory, series and continued fractions. Ramanujan […]
The crisis triggered by SARS-CoV-2 makes us talk about ventilators, essential specific devices in Intensive Care Units (ICU), capable of replacing or helping the lungs in their function. A patient with respiratory failure needs a […]
Einstein said that there were two infinite entities, the universe and human stupidity, although he wasn’t sure that the universe actually was infinite. As a recent demonstration of how right Einstein was, it is enough […]
German Chancellor Angela Merkel explained at a press conference last week how important the reproduction rate of the coronavirus is in controlling the epidemic, and how small increases could cause the health system to collapse […]
We have all been aware these days of the seriousness of the pandemic that has hit us, the dreaded COVID-19. Many aspects of the pandemic have been discussed and analysed in previous posts. In particular, […]
Before answering the question, let us review the situation in Europe one hundred years ago. The major European powers had triggered a devastating war, which they had also exported to other parts of the world, […]
A number of important questions about the coronavirus remain unanswered. One of them is the percentage of asymptomatic infected people it generates. The answer could explain why the epidemic has grown so fast in countries […]
These days, we have all heard that the Spanish government had bought, from a certain Chinese company, \(640\,000\) fast coronavirus detection tests whose reliability was only \(30\%\), so they had to return them. A \(30\%\) […]
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