Keyword : approximability

Inapproximability of the Edge-Contraction Problem
Hideaki OTSUKI Tomio HIRATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/05/01
Vol. E89-A  No. 5 ; pp. 1425-1427
Type of Manuscript:  Special Section LETTER (Special Section on Discrete Mathematics and Its Applications)
edge-contraction problemNP-hardapproximation algorithmapproximabilityconnected vertex cover problem
 Summary | Full Text:PDF(103.1KB)

Complexity and a Method of Extracting a Database Schema over Semistructured Documents
Nobutaka SUZUKI Yoichirou SATO Michiyoshi HAYASE 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2002/06/01
Vol. E85-D  No. 6 ; pp. 940-949
Type of Manuscript:  PAPER
Category: Databases
semistructured dataschema extraction problemapproximabilityNP-hardness
 Summary | Full Text:PDF(628.3KB)