# Educational blog

 Prostitution laws in Europe The oldest profession in the world is subject to completely different laws in different parts of the world, and the situation in Europe in (...) October 22, 2017 – Jakub Marian – Maps
 ‘Criteria’ – singular or plural? The media seem to have been plagued with expressions like “the criteria is” lately. Unfortunately, such expressions are incorrect, because (...) October 16, 2017 – Jakub Marian – English, Uncategorized
 What is $0^0$ ($0$ to the power $0$)? A short answer to this question is that $0^0$ is usually left undefined in introductory calculus classes, just like $0/0$, but it is often (...) October 15, 2017 – Jakub Marian – Mathematics
 ‘In formal context’ vs. ‘in a formal context’ in English “Context” can be a countable as well as an uncountable noun. When you speak about context in general, the word is usually uncountable, (...) October 6, 2017 – Jakub Marian – English
 So, thus, therefore, and hence in English Since you are reading this article in English, the odds are you already know what the conjunction “so” means. You probably also know that (...) October 5, 2017 – Jakub Marian – English
 ‘October’ in European languages In the Roman calendar, the year began with March, not January, so October was the eighth month of the year—hence the Latin name october, (...) October 2, 2017 – Jakub Marian – Maps
 Average hours worked per worker per week in Europe The following map shows the number of hours workers in each country work per week, on average, including both full-time and part-time (...) September 27, 2017 – Jakub Marian – Maps
 Integral of $\cot(x)$ To integrate cot(x), recall that cot(x) = cos(x)/sin(x), so ∫ cot(x) dx = ∫ cos(x)/sin(x) dx. (...) September 21, 2017 – Jakub Marian – Mathematics
 Corruption Perceptions Index of European countries A map shows the Corruption Perception Index of European countries published by Transparency International. (...) September 19, 2017 – Jakub Marian – Maps
 Pronouns in Esperanto The system of pronouns in Esperanto is very similar to the English one: mi (I), ni (we), vi (you), li (he), ŝi (she), ĝi (it), ili (they). (...) September 16, 2017 – Jakub Marian – Esperanto