1. A method, implemented by loading a program into the addressable memory of a general purpose computer and executing said program, for representing a hierarchy in a sequential data structure, comprising the steps of: selecting a mathematical series with a defined sequence of summation values and a defined sequence of terms, each said term being a function of an input variable, said input variable corresponding to the summation index variable of said defined sequence of summation values, said mathematical series having the property that any set of sub-sequences of said terms of said series, sorted into an order according to occurrence in said series of each sub-sequence's first term, can be sorted into the same order according to the magnitude of the result of adding each sub-sequence's terms, assigning to each node of said hierarchy one of said terms of said mathematical series, such that every parented node of said hierarchy has an assigned term which comes after said parented node's parent's assigned term in said mathematical series' said sequence of terms, and each said parented node of said hierarchy has an assigned term which is unique with respect to any of said parented node's siblings' assigned terms, calculating the respective numerical value of each respective node's assigned term and associating with each said respective node of said hierarchy said respective numerical value, calculating for each said respective node of said hierarchy the unique sum of said respective node's said respective associated numerical value plus the associated numerical values of all of said respective node's ancestors, splitting the range of binary digits which represent the value of said unique sum into segments such that the number of binary digits in each said segment is no longer than the maximum number of binary digits that said computer can address in a single data read/write cycle operating on said sequential data structure, defining in said sequential data structure a new data element by allocating in said computer's available memory a discrete number of addressable ranges equal to the number of said segments of said range of binary digits such that said addressable ranges of memory are capable of storing said range of binary digits in full, copying said segments of said range of binary digits each into one of said discrete number of addressable ranges of memory, whereby said general purpose computer becomes a special purpose computer whose addressable memory is in a state suitable for performing search and retrieval of hierarchical information.