Imaging maths - Inside the Klein bottle

September 2003

Klein Bottle with two Möbius Bands

The two Möbius bands of a Klein bottle are connected by an ordinary two-sided
loop whose back and front sides are colored white and blue respectively

Maths in a minute

Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.

The ICM 2018

The International Congress of Mathematicians (ICM) took place in Rio de Janeiro at the beginning of August. Here is all our coverage at a glance.
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Maths and politics

Mathematicians like to think that their field transcends politics, but as this brief history of the International Congress of Mathematicians shows, international mathematics has always been coloured by world events.