The Rank Organisation Davis cut staff, reduced budgets and concentrated film production at Pinewood. Other studio facilities (in Islington) were closed, sold (Lime Grove Studios) or leased (Denham). The Rank Organisation closed Independent Producers Ltd. The policies of Davis alienated many in the industry, in particular they led film director David Lean, responsible for some of Rank's most critically and financially successful films, to look elsewhere for backing. In 1949, the company bought the Bush Radio manufacturing facility and began to diversify its interests. In the early 1960s Rank took over Murphy Radio to form the Rank Bush Murphy Group (which was eventually
Prüfer rank seen that formula_3 will be equal to the "size of any minimal generating set" of formula_6. Those profinite groups with finite Prüfer rank are more amenable to analysis. Specifically in the case of finitely generated pro-p groups, having finite Prüfer rank is equivalent to having an open normal subgroup that is powerful. In turn these are precisely the class of pro-p groups that are p-adic analytic - that is groups that can be imbued with a p-adic manifold structure. Prüfer rank In mathematics, especially in the area of algebra known as group theory, the Prüfer rank of a pro-p group