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The COVID-19 emergency resulted in some amazing mathematical collaborations.

Here's a simple game at which a human can out-fox even the cleverest algorithm.

The INI is celebrating its 30th birthday. What is it and what is it do for maths and mathematicians?

Here's our coverage from the International Congress of Mathematicians 2022, including the Fields Medals and other prizes.

The COVID-19 pandemic has amplified the differences between us. Understanding these inequalities is crucial for this and future pandemics.

Being exact, a "standard" bottle encloses a volumne only if you put a cover on it.

The same applies to the Klein bottle. If you cover it at the "green end" (see aboves video) you will be able to distinguish "inside the bottle" and "outside the bottle" and thus the Klein bottle encloses a volumne in the same sense a "standard" bottle encloses a volumne.