Quaternionic Electron Theory: Dirac's Equation
  We perform a one-dimensional complexified quaternionic version of the Dirac equation based on $i$-complex geometry. The problem of the missing complex parameters in Quaternionic Quantum Mechanics with $i$-complex geometry is overcome by a nice ``trick'' which allows to avoid the Dirac algebra constraints in formulating our relativistic equation. A brief comparison with other quaternionic formulations is also presented. 
Stefano De Leo (Dip. di Fisica, INFN, Lecce, Italia), Waldyr A.   Rodrigues, Jr. (UNICAMP/IMECC, Campinas, Brasil)