books.google.co.uk - Hidden Markov models have become a widely used class of statistical models with applications in diverse areas such as communications engineering, bioinformatics, finance and many more. This book is a comprehensive treatment of inference for hidden Markov models, including both algorithms and statistical...http://books.google.co.uk/books/about/Inference_in_Hidden_Markov_Models.html?id=-3_A3_l1yssC&q=irreducibility+measure&utm_source=gb-gplus-shareInference in Hidden Markov Models