All Questions
5 questions
2
votes
0
answers
142
views
List decodability of Reed-Solomon codes beyond the Johnson bound
In a paper on a proximity test for Reed-Solomon codes the authors state an "extremely optimistical" conjecture on the list decodability of Reed-Solomon codes (over prime fields $\mathbb F_q$)...
4
votes
1
answer
330
views
Bipartite version of Hamming bound (two families of codewords with large Hamming distance)?
Update: In light of Fedor Petrov's answer, I added an additional requirement that all strings in $A$ and $B$ have Hamming weight exactly $n/2$, which hopefully makes the question more interesting.
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0
votes
1
answer
181
views
Bounding information of expression
Cross posted to theory exchange - https://cstheory.stackexchange.com/questions/45610/bounding-information-of-expression
Suppose $u_1,\ldots,u_n$ are uniformly iid in $\{0,1\}$.
Let $x_1,\ldots,x_n$ ...
4
votes
1
answer
196
views
Polynomial time decodable binary linear codes achieving $GV$ bound?
Are there explicit or random construction of linear codes that achieve the $GV$ bound with polynomial time decodable property with alphabet size $q=2$?
Tsfasman, Manin, Vladut beat the bound at ...
3
votes
4
answers
1k
views
Apply doubly stochastic matrix M to a probability vector, then entropy increases?
Consider a vector $p =(p_1,\dots,p_n)$, $p_i>0$, $\sum p_i = 1$
and a matrix $M_{ij}$, which is doubly stochastic: $\sum_i M_{ij} = 1, \sum_j M_{ij} = 1, M_{ij} > 0$.
Question 1 Just apply ...