15 points

Stupid person here, anyone mind explaining the joke?

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13 points

It’s more of a math meme: Cartan Subalgebra.

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3 points

lmao I went down a whole rabbit hole with the links in this page and I do not understand ANYTHING here. math is not my thing

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2 points

I see gothic small letters my brain goes LIE!

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6 points

The equation shown is a type of decomposition of a Lie algebra g that was introduced by Élie Cartan in his doctoral thesis. h is called a Cartan subalgebra of g.

To answer what a Lie algebra is, an extremely hand-wavy description might be: a Lie group is a continuous group of symmetries of some geometric object (for example, the group SO(3) of rotations of three-dimensional space), and the corresponding Lie algebra is the “tangent space” to the group, that is, the space of tiny changes you can make that lie “along” the group.

A lot of things in Lie theory and differential geometry are named after Élie Cartan, or sometimes after his son Henri.

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4 points

I thought I was getting the idea until your example. Now I’m just going to nod and say thank you for explaining enough that I get the joke :)

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0 points
*

That’s the sound I make when I see boobies.

Hooga aei

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1 point

😂 haha, nice one. Is it simple or semi-simple?

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