Contents: Elementary Aspects of Potential Theory in Mathematical Physics; Scattering Theory in Non-Relativistic One-Body Short-Range Quantum Mechanics: Möller Wave Operators and Asymptotic Completeness; On the Hilbert Space Integration Method for the Wave Equation and Some Applications to Wave Physics; Nonlinear Diffusion and Wave-Damped Propagation: Weak Solutions and Statistical Turbulence Behavior; Domains of Bosonic Functional Integrals and Some Applications to the Mathematical Physics of Path-Integrals and String Theory; Basic Integral Representations in Mathematical Analysis of Euclidean Functional Integrals; Nonlinear Diffusion in RD and Hilbert Spaces: A Path-Integral Study; On the Ergodic Theorem; Some Comments on Sampling of Ergodic Process: An Ergodic Theorem and Turbulent Pressure Fluctuations; Some Studies on Functional Integrals Representations for Fluid Motion with Random Conditions; The Atiyah Singer Index Theorem: A Heat Kernel (PDE s) Proof.