Wataru KUMAGAI


Robust Label Prediction via Label Propagation and Geodesic k-Nearest Neighbor in Online Semi-Supervised Learning
Yuichiro WADA Siqiang SU Wataru KUMAGAI Takafumi KANAMORI 
Publication:   
Publication Date: 2019/08/01
Vol. E102-D  No. 8  pp. 1537-1545
Type of Manuscript:  PAPER
Category: Artificial Intelligence, Data Mining
Keyword: 
semi-supervised learninglabel propagationmanifold learningonline learninggeodesic distance
 Summary | Full Text:PDF(466.1KB)

Toward Separating Integer Factoring from Discrete Logarithm mod p
Shuji ISOBE Wataru KUMAGAI Masahiro MAMBO Hiroki SHIZUYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/01/01
Vol. E90-A  No. 1  pp. 48-53
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Foundations
Keyword: 
preimage functionsrange injection reductionthe Heath-Brown conjectureinteger factoringcertified discrete logarithm
 Summary | Full Text:PDF(328.2KB)