Hiroyuki UMEDA


Nash Equilibria in Combinatorial Auctions with Item Bidding and Subadditive Symmetric Valuations
Hiroyuki UMEDA Takao ASANO 
Publication:   
Publication Date: 2018/09/01
Vol. E101-A  No. 9  pp. 1324-1333
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
Nash equilibriumcombinatorial auctionprice of anarchysocial welfare problemsubadditivity
 Summary | Full Text:PDF(775.3KB)

A New M-PSK Code Construction with Good Minimum Euclidean Distance for AWGN Channels
Abdussalam Ibn AHD Hidehiko TANABE Hiroyuki UMEDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/06/01
Vol. E84-A  No. 6  pp. 1564-1571
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
coset codesidealidempotentsdecoding complexityring structure
 Summary | Full Text:PDF(456KB)

Binary Component Codes Construction of Multilevel Block Modulation Codes with a Large Minimum Euclidean Distance
Hidehiko TANABE Mohammad Abdus SALAM Masayasu MITAMURA Hiroyuki UMEDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/07/25
Vol. E81-A  No. 7  pp. 1521-1528
Type of Manuscript:  PAPER
Category: Information Theory and Coding Theory
Keyword: 
multilevel codeEuclidean distancecoset decompositioncyclic code
 Summary | Full Text:PDF(717.3KB)