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
Tensor rank decomposition formula_23 form a dense set formula_28: every tensor in the aforementioned space is either of rank less than the generic rank, or it is the limit in the Euclidean topology of a sequence of tensors from formula_28. In the case of real tensors, the set of tensors of rank at most formula_23 only forms an open set of positive measure in the Euclidean topology. There may exist Euclidean-open sets of tensors of rank strictly higher than the generic rank. All ranks appearing on open sets in the Euclidean topology are called typical ranks. The smallest typical rank is called the