Now showing items 1-10 of 13
The number of ways to label a structure
(Springer-Verlag; Psychometric Society, 1967-06)
It has been observed that the number of different ways in which a graph with p points can be labelled is p ! divided by the number of symmetries, and that this holds regardless of the species of structure at hand. In this ...
A graph theory interpretation of nodal regions
(Springer-Verlag; The Regional Science Association, 1961-12)
The techniques defined in this paper will divide a set of cities into subgroups which specify a central place and its subordinate hierarchy. The association between cities is not the only system which may be defined as a ...
An approach to the direct measurement of community mean information fields
(Springer-Verlag; The Regional Science Association, 1963-12)
Computation of the correspondence of geographical patterns
(Springer-Verlag; The Regional Science Association, 1965-12)
The probability of a given 1-choice structure
(Springer-Verlag; Psychometric Society, 1966-06)
A 1-choice structure arises whenever each person in a group chooses exactly one other person according to some criterion. Our purpose is to study the situation in which these choices are made at random. As noted in Harary, ...
Recent results in topological graph theory
(Kluwer Academic Publishers; Akadémiai Kiadó ; Springer Science+Business Media, 1964-09)
MEDIEVAL DISTORTIONS: THE PROJECTIONS OF ANCIENT MAPS
(Blackwell Publishing Ltd, 1966-06)
. Estimates of the map projection employed for an ancient map is a prerequisite for a variety of other studies. The preliminary evaluation presented here has yielded empirical equations for the Hereford map and illustrated ...
A graph theoretic approach to matrix inversion by partitioning
(Springer-Verlag, 1962-12)
Let M be a square matrix whose entries are in some field. Our object is to find a permutation matrix P such that PM P −1 is completely reduced, i.e., is partitioned in block triangular form, so that all submatrices below ...