He explains that borders are not a linear map or a two-dimensional picture—they exist underwater, in the air, over land, underground, and even in space and cyberspace. Listen to the podcast episode ...

We introduce the notion of (completely) multi-positive linear maps between C*-algebras, and show that a completely multi-positive linear map induces a representation of a C*-algebra on Hilbert ...

Linear maps, characterised by their preservation of vector addition and scalar multiplication, facilitate the transition between different spaces while maintaining intrinsic structural properties.