https://baike.baidu.com/item/%E4%B8%89%E5%85%94%E5%9B%BE/107...
I'm still trying to internalize+merge the other sense of Lagrangian (as in "L submanifold")
https://baike.baidu.com/item/%E4%B8%89%E5%85%94%E5%9B%BE/107...
I'm still trying to internalize+merge the other sense of Lagrangian (as in "L submanifold")