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 MarianMaps
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‘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 MarianEnglish, 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 MarianMathematics
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‘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 MarianEnglish
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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 MarianEnglish
‘October’ in European languages
In the Roman calendar, the year began with March, not January, so October was the eighth month of the yearhence the Latin name october, (...)
October 2, 2017 – Jakub MarianMaps
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 MarianMaps
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 MarianMathematics
Corruption Perception Index in Europe 2016
Corruption Perceptions Index of European countries
A map shows the Corruption Perception Index of European countries published by Transparency International. (...)
September 19, 2017 – Jakub MarianMaps
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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 MarianEsperanto