DB - /z-wcorg/
DP - http://worldcat.org
ID - 63886547
LA - English
T1 - Viro's patchworking disproves Ragsdale's conjecture
A1 - De Loera, Jesús A.,, Wicklin, Frederick J., University of Minnesota., Geometry Center.,
PB - The Geometry Center
CY - [Minneapolis]
Y1 - 1997///
AB - This animated video explains new developments concerning Hilbert's sixteenth problem, still unsolved, dealing with ways nonsingular level sets of polynomials can be arranged in the projected plane. Mathematician Virginia Ragsdale had conjectured an upper bound on the number of topological circles resulting from algebraic curves of degree 2k. After almost 90 years, Oleg Viro has proposed a new combinatorial method for constructing curves, known as patchworking, which has shown counter-examples to the Ragsdale Conjecture.
ER -