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JUCS
2010
110views more  JUCS 2010»
13 years 2 months ago
On Choice Principles and Fan Theorems
: Veldman proved that the contrapositive of countable binary choice is a theorem of full-fledged intuitionism, to which end he used a principle of continuous choice and the fan the...
Hannes Diener, Peter Schuster
ACCV
2006
Springer
14 years 1 months ago
Interpreting Sphere Images Using the Double-Contact Theorem
An occluding contour of a sphere is projected to a conic in the perspective image, and such a conic is called a sphere image. Recently, it has been discovered that each sphere imag...
Xianghua Ying, Hongbin Zha
SIAMDM
2008
86views more  SIAMDM 2008»
13 years 6 months ago
Hamilton Cycles in Planar Locally Finite Graphs
A classical theorem by Tutte assures the existence of a Hamilton cycle in every finite 4-connected planar graph. Extensions of this result to infinite graphs require a suitable co...
Henning Bruhn, Xingxing Yu
CORR
2011
Springer
128views Education» more  CORR 2011»
13 years 2 months ago
LIFO-search on digraphs: A searching game for cycle-rank
We consider the extension of the last-in-first-out graph searching game of Giannopoulou and Thilikos to digraphs. We show that all common variations of the game require the same ...
Paul Hunter
COMBINATORICS
2007
67views more  COMBINATORICS 2007»
13 years 7 months ago
Non-Commutative Sylvester's Determinantal Identity
Sylvester’s identity is a classical determinantal identity with a straightforward linear algebra proof. We present combinatorial proofs of several non-commutative extensions, an...
Matjaz Konvalinka