subprincipal

English

Etymology

sub- +‎ principal

Adjective

subprincipal (not comparable)

1. (mathematics) This term needs a definition. Please help out and add a definition, then remove the text {{rfdef}}.
   • 2016, Tatsuo Nishitani, “On the Cauchy problem for differential operators with double characteristics, transition from effective to non-effective characteristics”, in arXiv‎^[1]:

     Then we prove the well-posedness of the Cauchy problem in all Gevrey classes assuming, on the double characteristic manifold, that the ratio of the imaginary part of the subprincipal symbol to the real eigenvalue of the Hamilton map is bounded and that the sum of the real part of the subprincipal symbol and the modulus of the imaginary eigenvalue of the Hamilton map is strictly positive..

Noun

subprincipal (plural subprincipals)

1. A subordinate principal; vice-principal.