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原文連結
論文資訊
- 類型:已發表論文
- 日期:2009
摘要
We give a systematic expansion of the crypticity-a recently introduced measure of the inaccessibility of a stationary process's internal state 資訊. This leads to a hierarchy of k-cryptic processes and allows us to identify finite-state processes that have infinite cryptic order-the internal state 資訊 is present across arbitrarily long, observed sequences. The crypticity expansion is exact in both the finite-and infinite-order cases. It turns out that k-crypticity is complementary to the 馬可夫ian finite-order property that describes state 資訊 in processes. One application of these results is an efficient expansion of the excess 熵-the mutual 資訊 between a process's infinite past and infinite future-that is finite and exact for finite-order cryptic processes.
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