  A deterministic Bohmian mechanics for operators with continuous and discrete
spectra is presented. Randomness enters only through initial conditions.
Operators with discrete spectra are incorporated into Bohmian mechanics by
associating with each operator a continuous variable in which a finite range of
the continuous variable correspond to the same discrete eigenvalue. In this way
Bohmian mechanics can handle the creation and annihilation of particles.
Examples are given and generalizations are discussed.
