The Rank Group and Rank España in Spain (10 bingo clubs). Rank is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index. The company was formed to acquire the business interests of the Rank Organisation, which itself was formed out of the business interests of its founder, J. Arthur Rank. Until the start of the 21st century, the group still had a tremendous amount of leisure holdings; however, as the decade progressed it divested these interests, beginning with Pinewood Studios and the Odeon cinema chain. It also shed its engineering interests, such as its share in Rank
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