👉 Pseudovary is a mathematical concept in linear algebra and graph theory. It was introduced by John von Neumann in his 1958 paper "On the Representation of Linear Transformations as Matrices". Pseudovaries are analogous to pseudovectors, but instead of representing vectors, they represent scalars. In terms of linear transformations, a pseudovary is a linear transformation that can be represented by a matrix. For example, if we have a linear transformation \(T:
