Search Results for author: Armen E. Allahverdyan

Found 11 papers, 1 papers with code

Ultimatum game: regret or fairness?

no code implementations7 Nov 2023 Lida H. Aleksanyan, Armen E. Allahverdyan, Vardan G. Bardakhchyan

We explain this rejection behavior via the following principle: if the responder regrets less about losing the offer than the proposer regrets not offering the best option, the offer is rejected.

Fairness Intent Recognition

Unsupervised extraction of local and global keywords from a single text

no code implementations26 Jul 2023 Lida Aleksanyan, Armen E. Allahverdyan

We propose an unsupervised, corpus-independent method to extract keywords from a single text.

Regret theory, Allais' Paradox, and Savage's omelet

no code implementations6 Jan 2023 Vardan G. Bardakhchyan, Armen E. Allahverdyan

We study a sufficiently general regret criterion for choosing between two probabilistic lotteries.

Optimal alphabet for single text compression

no code implementations13 Jan 2022 Armen E. Allahverdyan, Andranik Khachatryan

We also show that the codebook representation is important -- switching from a naive representation to a compact one significantly improves the matters for alphabets with large number of symbols, most notably the words.

Text Compression

Two halves of a meaningful text are statistically different

1 code implementation9 Apr 2020 Weibing Deng, R. Xie, S. Deng, Armen E. Allahverdyan

The differences reveal a temporal asymmetry in meaningful texts, which is confirmed by showing that texts are much better compressible in their natural way (i. e. along the narrative) than in the word-inverted form.

Vocal Bursts Valence Prediction

Active image restoration

no code implementations22 Sep 2018 Rongrong Xie, Shengfeng Deng, Weibing Deng, Armen E. Allahverdyan

Within this regime the strategy is outperformed by its local (adaptive) version, which supervises pixels that do not agree with their Bayesian estimate.

Image Restoration

Relating Zipf's law to textual information

no code implementations22 Sep 2018 Weibing Deng, Armen E. Allahverdyan

In all studied texts we saw that for the first half Zipf's law applies from smaller ranks than in the second half, i. e. the law applies better to the first half.

Stochastic model for phonemes uncovers an author-dependency of their usage

no code implementations5 Oct 2015 Weibing Deng, Armen E. Allahverdyan

We study rank-frequency relations for phonemes, the minimal units that still relate to linguistic meaning.

Active Inference for Binary Symmetric Hidden Markov Models

no code implementations3 Nov 2014 Armen E. Allahverdyan, Aram Galstyan

We consider active maximum a posteriori (MAP) inference problem for Hidden Markov Models (HMM), where, given an initial MAP estimate of the hidden sequence, we select to label certain states in the sequence to improve the estimation accuracy of the remaining states.

Comparative Analysis of Viterbi Training and Maximum Likelihood Estimation for HMMs

no code implementations NeurIPS 2011 Armen E. Allahverdyan, Aram Galstyan

We present an asymptotic analysis of Viterbi Training (VT) and contrast it with a more conventional Maximum Likelihood (ML) approach to parameter estimation in Hidden Markov Models.

Phase Transitions in Community Detection: A Solvable Toy Model

no code implementations2 Dec 2013 Greg Ver Steeg, Cristopher Moore, Aram Galstyan, Armen E. Allahverdyan

It predicts a first-order detectability transition whenever $q > 2$, while the finite-temperature cavity method shows that this is the case only when $q > 4$.

Community Detection

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