Pinewood Studios continued to be based at the studios since then. J. Arthur Rank (by now Lord Rank) retired as chairman in 1962 and was succeeded by John Davis, who had begun to move the Rank Organisation away from mass film production and towards more profitable and less risky businesses like bingo and holidays. The 1970s were an uncertain period for Pinewood and the film industry in general, with the studios being used more for television programmes, including ITC Entertainment's "UFO" (1970), "The Persuaders!" (1971), starring Tony Curtis and Roger Moore, and "" (1975–77). Throughout the lean years of the 1970s the
Tsen rank Tsen rank In mathematics, the Tsen rank of a field describes conditions under which a system of polynomial equations must have a solution in the field. The concept is named for C. C. Tsen, who introduced their study in 1936. We consider a system of "m" polynomial equations in "n" variables over a field "F". Assume that the equations all have constant term zero, so that (0, 0, ... ,0) is a common solution. We say that "F" is a T-field if every such system, of degrees "d", ..., "d" has a common non-zero solution whenever The "Tsen rank" of