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Down the Mail Tubes: The Pressured Postal System, 1853-1984
(Institute of Mathematical Geography, 1985)
Table of Contents:
Introduction | Pneumatic Postal Networks in Western Europe (Experimental Networs: 1853-1871; Network Expansion: 1871-1918; Networks after World War I: 1918-1984) | Pneumatic Postal Networks in the ...
Fractals Take a Central Place
(Royal Stockholm Institute of Economics, 1985)
Please read the attached file for an abstract and for a link to the full text for the reader to use via a participating library or other institutions (for a free copy).
Eye-contact graphs
(Behavioral Science, 1985)
The structure of nonverbal communication expressed as eye-contact between two human beings is analyzed using graph-theoretic tools involving a theorem of Konig on bipartite graphs and various results concerning directed ...
Detroit Water and Sewerage Department Pollution and Detection Abatement, Preliminary Report
(1985)
Preliminary report of a task force.
On signed digraphs with all cycles negative
(Elsevier, 1985-10)
It is known that signed graphs with all cycles negative are those in which each block is a negative cycle or a single line. We now study the more difficult problem for signed diagraphs. In particular we investigate the ...