cool maths 

The is great as usual, and I especially enjoyed today’s entry. Both @mscroggs (or maybe @mathslogicbot?) and @icecolbeveridge made me go ”Ooh, that’s very nice!”

It’s a tough call, but the linear algebra interpretation of Fibonacci sequence is my favourite so far.

Looking for a bit bigger ? My Christmas crossnumber, inspired by the amazing @chalkdustmag conundrum, is here once again!

@mscroggs Here are all the right-angled triangles for question 12 of the advent calendar.

. | ̄ ̄|
| 🎃 |
|__ |
(\_/) ||
(•ㅅ•) ||
/   づ

Aaarg, I'm using \(\epsilon\) and \(\varepsilon\) (for two different values) in the same equation. I fear it may be time to burn this laptop and start my PhD again from scratch.

:chalkdust_scorpion: Do you love maths magazines and the first number that is neither prime nor semiprime? Then you'll love our 8th issue!

:chalkdust_scorpion: Do you love maths magazines and vertices of cubes? Then you'll love our 8th issue!

\[\sqrt{\sqrt{9} - \sqrt{8}} = \sqrt{2} - \sqrt{1}\]

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