It is Fred Dervin who writes about identities as liquid. I imagine the liquid mirror in the filmThe Matrix, which I also talked about in thispost on reflexivity. But that liquid mirror was one that consumed the person, rather than the person themselves being liquid, which is, I think, ...
Levi Civita notation, also known as the Levi-Civita symbol or the permutation tensor, is a mathematical symbol used to represent the determinant of a square matrix. It was first introduced by Italian mathematician Tullio Levi-Civita in the late 19th century. ...