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Summary: FourTerminal Reducibility
and ProjectivePlanar
WyeDeltaWyeReducible Graphs
Dan Archdeacon
Dept. of Math. and Stat.
University of Vermont
Burlington, VT 05405 USA
dan.archdeacon@uvm.edu
Charles J. Colbourn
Dept. of Computer Science
University of Vermont
Burlington, VT 05405 USA
colbourn@emba.uvm.edu
Isidoro Gitler
Departamento de Matem'aticas
Centro de Investigaci'on
y Estudios Avanzados del IPN
Apartado Postal 14--740
M'exico, D.F. 07000 MEXICO
igitler@math.cinvestav.mx
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