Abstract
(ProQuest: ... denotes formulae and/or non US-ASCII text omitted; see image) Conference Title: 2015 54th IEEE Conference on Decision and Control (CDC) Conference Start Date: 2015, Dec. 15 Conference End Date: 2015, Dec. 18 Conference Location: Osaka, Japan We introduce system theoretic notions of a Hankel operator, and Hankel norm for hidden Markov models. We show how the related Hankel singular values provide lower bounds on the norm of the difference between a hidden Markov model of order n and any lower order approximant of order n...