Document from the year 2018 in the subject Physics - Theoretical Physics, grade: -, course: -, language: English, abstract: Mathematical indices are mapped to physical indices which are themselves mapped to nets, such that the nets can be used for describing the four forces. The consideration of quaternions and octonions leads to forces, which can describe the effect of dark matter and dark energy. Singularities are described by disconnected nets of infinite cardinality.