A novel view on successive quantizations, leading to increasingly more "miraculous" states

Pais - Uhlenbeck oscillator and negative energies

A New Approach to the Classical and Quantum Dynamics of Branes

A non-trivial zero length limit of the Nambu-Goto string

Pais-Uhlenbeck Oscillator with a Benign Friction Force

Stable Self-Interacting Pais-Uhlenbeck Oscillator

Klein-Gordon-Wheeler-DeWitt-Schroedinger equation

On the space inversion of spinors:  Mirror particles

Clifford Space as a Possible Clue to the Unification of  Fundamental Interactions


A novel approach to generaliziation of  relativity:

Space of points, lines, 2-areas, 3-volumes, 4-volumes (16-dimensional Clifford space)

Kaluza-Klein theory without extra dimensions: curved Clifford Space

Ordering ambiguity resolved by Clifford algebra