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Electronic Colloquium on Computational Complexity

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TR20-135 | 9th September 2020
Sourav Chakraborty, Arijit Ghosh, Gopinath Mishra, Sayantan Sen

Estimation of Graph Isomorphism Distance in the Query World

Revisions: 3

The graph isomorphism distance between two graphs $G_u$ and $G_k$ is the fraction of entries in the adjacency matrix that has to be changed to make $G_u$ isomorphic to $G_k$. We study the problem of estimating, up to a constant additive factor, the graph isomorphism distance between two graphs in ... more >>>


TR20-134 | 9th September 2020
Siddhesh Chaubal, Anna Gal

Tight Bounds on Sensitivity and Block Sensitivity of Some Classes of Transitive Functions

Nisan and Szegedy conjectured that block sensitivity is at most
polynomial in sensitivity for any Boolean function.
Until a recent breakthrough of Huang, the conjecture had been
wide open in the general case,
and was proved only for a few special classes
of Boolean functions.
Huang's result implies that block ... more >>>


TR20-133 | 8th September 2020
Noga Ron-Zewi, Ronen Shaltiel, Nithin Varma

Query complexity lower bounds for local list-decoding and hard-core predicates (even for small rate and huge lists)

A binary code $\text{Enc}:\{0,1\}^k \rightarrow \{0,1\}^n$ is $(\frac{1}{2}-\varepsilon,L)$-list decodable if for every $w \in \{0,1\}^n$, there exists a set $\text{List}(w)$ of size at most $L$, containing all messages $m \in \{0,1\}^k$ such that the relative Hamming distance between $\text{Enc}(m)$ and $w$ is at most $\frac{1}{2}-\varepsilon$.
A $q$-query local list-decoder is ... more >>>



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