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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.

I have taken a DNA test, and found out I shared over a percentage of DNA with a person. Through church records I found out that we are 5th cousins, - but doubly in the last generation, i.e., we have two sets of shared 4xgreat grandparents. If we had only one set, our shared DNA should have, on average, been 0.04% which is 25 times less.

I am sure that other factors (kinship I don't know, measurement errors at the website, the fact that the amount of DNA passed down in each generation obviously differs (law of great numbers), etc), matter, but it makes me curious about what the theoretical average shared DNA between us would be. You can't simply double the kinship for 5th cousins, can you? You need to do something fancier, methinks.