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- Michael H. Albert, Alexander Golynski, Angèle M. Hamel, Alejandro López-Ortiz, S. Srinivasa Rao, Mohammad Ali Safari
- Theor. Comput. Sci.
- 2004

We consider the problem of ÿnding the longest increasing subsequence in a sliding window over a given sequence (LISW). We propose an output-sensitive data structure that solves this problem in time O(n log log n + OUTPUT) for a sequence of n elements. This data structure substantially improves over the na ve generalization of the longest increasing… (More)

- Alice M. Dean, William S. Evans, Ellen Gethner, Joshua D. Laison, Mohammad Ali Safari, William T. Trotter
- Graph Drawing
- 2005

Let S be a set of horizontal line segments, or bars, in the plane. We say that G is a bar visibility graph, and S its bar visibility representation , if there exists a one-to-one correspondence between vertices of G and bars in S, such that there is an edge between two vertices in G if and only if there exists an unobstructed vertical line of sight between… (More)

- Alice M. Dean, William S. Evans, Ellen Gethner, Joshua D. Laison, Mohammad Ali Safari, William T. Trotter
- J. Graph Algorithms Appl.
- 2007

Let S be a set of horizontal line segments, or bars, in the plane. We say that G is a bar visibility graph, and S its bar visibility representation , if there exists a one-to-one correspondence between vertices of G and bars in S, such that there is an edge between two vertices in G if and only if there exists an unobstructed vertical line of sight between… (More)

Constructing soccer robots is an attempt in development of AI researches, done by defining a standard problem and solving it by many researchers all over the world. In this field, every year a formal federation holds international competitions, called RoboCup [1]. The Simulation League is one of the branches of the RoboCup. We have designed and implemented… (More)

- Kin Kwong Leung, Chi Wan Sung, Majid Khabbazian, Mohammad Ali Safari
- IEEE Transactions on Information Theory
- 2010

The complexity of the optimal phase control problem in wireless MIMO systems with scalar feedback quantization and equal-gain transmission is studied. The problem is shown to be NP-hard when the number of receive antennas grows linearly with the number of transmit antennas. For the case where the number of receive antennas is constant, the problem can be… (More)

- Mohammad Ali Safari
- MFCS
- 2005

- Shayan Ehsani, MohammadAmin Fazli, +4 authors Saber ShokatFadaee
- SPAA
- 2011

We consider a network creation game in which, each player (vertex) has a limited budget to establish links to other players. In our model, each link has a unit cost and each agent tries to minimize its cost which is its local diameter or its total distance to other players in the (undirected) underlying graph of the created network. Two variants of the game… (More)

- Mohammad Ali Safari, Mohammad R. Salavatipour
- SIAM J. Discrete Math.
- 2011

- Mahmoudreza Babaei, Baharan Mirzasoleiman, Mahdi Jalili, Mohammad Ali Safari
- Social Network Analysis and Mining
- 2012

Social networking has become a part of daily life for many individuals across the world. Widespread adoption of various strategies in such networks can be utilized by business corporations as a powerful means for advertising. In this study, we investigated viral marketing strategies in which buyers are influenced by other buyers who already own an item.… (More)