Title
Robust Local Testability of Tensor Products of LDPC Codes
Abstract
Given two binary linear codes R and C, their tensor product R C consists of all matrices with rows in R and columns in C. We analyze the "robustness" of the following test for this code (suggested by Ben-Sasson and Sudan (6)): Pick a random row (or column) and check if the received word is in R (or C). Robustness of the test implies that if a matrix M is far from R C, then a significant fraction of the rows (or columns) of M are far from codewords of R (or C). We show that this test is robust, provided one of the codes is what we refer to as smooth. We show that expander codes and locally-testable codes are smooth. This complements recent examples of P. Valiant (13) and Coppersmith and Rudra (9) of codes whose tensor product is not robustly testable.
Year
DOI
Venue
2006
10.1007/11830924_29
Electronic Colloquium on Computational Complexity (ECCC)
Keywords
Field
DocType
following test,locally-testable code,p. valiant,tensor product r,expander code,ldpc code,robust local testability,tensor product,random row,binary linear codes r,recent example,matrix m
Tensor product,Discrete mathematics,Combinatorics,Matrix (mathematics),Low-density parity-check code,Block code,Binary code,Expander code,Error detection and correction,Linear code,Mathematics
Journal
Volume
Issue
ISSN
13
118
0302-9743
ISBN
Citations 
PageRank 
3-540-38044-2
21
0.81
References 
Authors
13
3
Name
Order
Citations
PageRank
Irit Dinur1118785.67
Madhu Sudan25616591.68
Avi Wigderson382051064.31