\name{ts-internal}
\alias{Ops.ts}
\alias{arma0f}
\alias{is.mts}
\title{Internal ts functions}
\description{
 Internal ts functions
}
\usage{
Ops.ts(e1, e2) 
arma0f(p) 
is.mts(x)
}
\details{
  These are not to be called by the user.
}
\keyword{internal}
