Lectures

Lecture #ContentReference
1Introduction to communication complexity, protocol partition and tiling, clique vs independent set.KN97 (§ 1.1, 1.2, 2.2, 2.3), Juk12 (§ 3.2, 4.4)
2Fooling set and rectangle size bound, rank bound, comparison of two techniques, non-determinism.KN97 (§ 1.3, 1.4, 2.1, 2.5), DHS96
3More on non-determinism, $P = NP \cap coNP$, Separation of $P$ and $NP \cap coNP$, $UP$, Decision tree and composed functions.KN97 (§ 2.3 - 2.5), Juk11 (§ 13.4), GPW15
4Simulation theorem (I): Hitting distribution for $GH$, The simulation algorithm.GPW15, CKLM17
5Simulation theorem (II): Thickness and its properties, The simulation algorithm.GPW15, CKLM17
6Randomization: Zero-error, one-sided error, $EQ$ function and separations, Private coin vs public coin.KN97 (§ 3.1 - 3.3)
7Protocol for $GT, DISJ_{nk}$, Distributional complexity, Yao’s minimax principle.KN97 (§ 3.4), HW07
8Discrepancy: lower bound for $IP_n, GT_n$; Disjointness under product distribution.KN97 (§ 3.5), CP10, BW16
9Disjointness under product distribution: Lower bound and upper bound.CP10, BFS86
10Corruption bound, Razborov’s hard distribution for $DISJ_n$, Index function.KN97 (§ 4.6), CP10, GW16
11Information theory primer, Index function lower bound, Information complexity.RY18 (§ 6.1 - 6.4), BJKS04, JKS03
12Direct sum of information complexity, Lower bound for $DISJ_n$.RY18 (§ 6.1 - 6.4), BJKS04, JKS03, Bra17, BR11
13Asymmetric communication complexity, Richness method, Index function and lopsided $DISJ$, Application in data-structure.KN97 (§ 4.3), MNWS98
14Lecture by Jakob Nordström (I). Proof systems, Proof complexity and communication complexity, (Critical) block sensitivity.HN12, Notes
15Lecture by Jakob Nordström (II). Communication complexity of lifted search problem.HN12, Notes
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