This is PSTJ Volume 8 Issue 12 first published in December 2017. It is entitled "Progress in Math. Physics: Inextensible Flows, Identities & Lanczos Tensor/Spinor/Scalar" and contains the following articles: (1) A New Approach to Inextensible Flows of Curves with Ribbon Frame; (2) Identities of Gould & Spivey; (3) Non-local Superpotential for the Radiative Part of the Li nard-Wiechert's Electromagnetic Field; (4) Superpotentials for the Lanczos Tensor/Spinor...