منابع مشابه
Lecture 15 — April 12 , 2012
In this lecture, we look at various data structures to solve problems about static trees: given a static tree, we perform some preprocessing to construct our data structure, then use the data structure to answer queries about the tree. The three problems we look at in this lecture are range minimum queries (RMQ), lowest common ancestors (LCA), and level ancestor (LA); we will support all these ...
متن کاملLecture 15 — April 12 , 2012
We care not only about the value of the minimum element, but also about the index k of the minimum element between A[i] and A[j]; given the index, it is easy to look up the actual value of the minimum element, so it is a more interesting problem to find the index of the minimum element between A[i] and A[j]. The range minimum query problem is not a tree problem, but it closely related to a tree...
متن کاملLecture 19 — November 15 , 2012
In the last lecture, we saw the graph powering method, which allows us to increase the soundness gap but has the drawback of increasing the alphabet size from |Σ| to |Σ|dt (where |Σ| is a constant). In this lecture, we describe how to reduce the alphabet size (from |Σ|dt back to |Σ|), while causing only a small decrease in the gap (and a constant factor increase in the constraint graph size). T...
متن کاملAdvanced Complexity Theory Fall 2012 Lecture 15 — November 1 , 2012
Q: Why are we using circuit lower bounds here, as opposed to a claim such as E ̸⊆ P for example? A: The proof of the Nisan-Wigderson pseudorandom generator relies on nonuniformity, by showing that distinguishing a pseudorandom generator implies a circuit for solving a hard problem – this reduction involves hardwiring advice into a circuit in order to solve the hard problem. A contradiction requi...
متن کامل10th International Conference of ACOS, June 13-15 2012
ogy Society (ACOS) was held in conjunction with 38th Annual Meeting of the Korean Cancer Association during the period of June 13-15, 2012 in COEX, which is the flagship conference facility of Korea located in the city of Seoul. Four sessions were allocated for gynecologic oncology in total. Four special lectures, four educational lectures, six oral presentations, and twenty-two poster presenta...
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ژورنال
عنوان ژورنال: Southern Spaces
سال: 2012
ISSN: 1551-2754
DOI: 10.18737/m7kp5m