Sub-Linear Time Algorithms: Fast, Cheap and (Only a Little) Out of Control
summary
Claims that many global questions about huge data are answerable with sublinear work: property testing of lists (a one/epsilon·log n tester that binary-searches sampled items and is optimal), fast approximations (deterministic 2-approx diameter in O(M) for M points), and distribution tests based on collision probability estimator giving ~√n/ε^2 samples for uniformity, n^{2/3} for two unknowns, and n/log n for closeness; tools include sampling, binary search, collision statistics, and local/distributed algorithm techniques (LCAs) that probe small neighborhoods.
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chapters (22)
- 0:00Introduction
- 0:40The Small World Phenomenon
- 3:28The Gold Standard
- 9:18Example
- 16:25Proposed Algorithm
- 24:15Test
- 25:35Binary Search
- 27:27Binary Search Proof
- 28:35Test Restated
- 30:25Binary Search Example
- 33:00Property Testers
- 34:30Homomorphisms
- 38:15Properties of Functions
- 39:20Properties of Graphs
- 40:05Graph isomorphism
- 43:20Simple Example
- 43:55Input Size
- 45:00Algorithm
- 48:05Large outputs
- 49:00Local Decoding
- 51:05Local Computation
- 53:00Lazy Greedy
