Quaternionic eigenvalue problem
  We discuss the (right) eigenvalue equation for $\mathbb{H}$, $\mathbb{C}$ and $\mathbb{R}$ linear quaternionic operators. The possibility to introduce an isomorphism between these operators and real/complex matrices allows to translate the quaternionic problem into an {\em equivalent} real or complex counterpart. Interesting applications are found in solving differential equations within quaternionic formulations of quantum mechanics. 
S. De Leo (DMA-UniCamp), G. Scolarici (DF-LECCE) and L. Solombrino   (DF-LECCE)