@inproceedings{a3c43d21af3543b1805e18949c8bea0d,
title = "A counterexample to aggregation based model reduction of Hidden Markov Models",
abstract = "This paper highlights a limitation of state space aggregation based model reduction of Hidden Markov Models. We construct an {\^n} dimensional Hidden Markov Model that is equivalent to a lower dimensional one of order n < {\^n} for which aggregation based reduction of the high dimensional model is guaranteed not to produce an error free low dimensional model of order n.",
author = "Georgios Kotsalis and Shamma, {Jeff S.}",
note = "Copyright: Copyright 2012 Elsevier B.V., All rights reserved.; 2011 50th IEEE Conference on Decision and Control and European Control Conference, CDC-ECC 2011 ; Conference date: 12-12-2011 Through 15-12-2011",
year = "2011",
doi = "10.1109/CDC.2011.6161404",
language = "English (US)",
isbn = "9781612848006",
series = "Proceedings of the IEEE Conference on Decision and Control",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "6558--6563",
booktitle = "2011 50th IEEE Conference on Decision and Control and European Control Conference, CDC-ECC 2011",
address = "United States",
}