General Mathematics

2608 Submissions

[2] viXra:2608.0057 [pdf] submitted on 2026-08-14 20:49:35

Ramanujan Pi Series-Proof

Authors: Leonardo Rubino
Comments: 142 Pages.

Ramanujan Pi series — proof, and other subjects of interest in the Appendix I.
Category: General Mathematics

[1] viXra:2608.0051 [pdf] submitted on 2026-08-13 20:28:31

Tensors and Change of Coordinates

Authors: Leonardo Rubino
Comments: 113 Pages.

In physics the use of the spherical or cylindrical coordinates is often the only way to develop a subject at an acceptable level of difficulty, as such a use allows us to benefit from the simplifications coming from the existing symmetry (spherical or cylindrical, indeed). Here is a treatise with tensors and also a classical one, without tensors.
Category: General Mathematics