The Dirac particle on de Sitter background
  We show that the Dirac equation on de Sitter background can be analytically solved in a special static frame where the energy eigenspinors can be expressed in terms of usual angular spinors known from special relativity, and a pair of radial wave functions. 
Ion I. Cot\u{a}escu (The West University of Timi\c{s}oara, Romania)