Not to be confused with Tetrahedral Multiverse Sectioning, in which a section of the multiverse is defined by a tetrahedron with each vertex being an object of importance.
A Tetraverse is a structure made of 4 universes. Tetraverses serve no importance. (Honestly your not missing out on much if you click off of this.)
How to write Tetraverse interactions[]
A tetraverse interaction is the rough show of how each universe interacts with the system. First is to find any Triverses and Biverses, these are marked with brackets. For example, if in Tetra ABCD, A & C form a Biverse, the name changes from ABCD to [AC]BD. Lets say in [AC]BD, B interacts with AC but not D, and D interacts with AC but not B. Dashes are put to show interactions, so [AC]BD turns into B-[A-C]-D. As a final note letters can appear more than once, in fact, sometimes this is necessary as in the interaction [D-B-A-D]-C. One of the letters in the brackets must appear two times, as you wouldn't be able to show every letter in the brackets interacts with every other letter in the brackets.