Forward and Backward algorithms

The training objectives of the learning object are: 1) To explain the difficulty of computing the probability of a string with a Hidden Markov Model (HMM); 2) To compute the prob. of a string with the Forward algorithm; and 3) To compute the prob. of a string with the Backward algorithm. In this regard, it is worth noting that, given an HMM, both the Forward and Backward algorithms are commonly used for efficient computation of the exact probability of a string. In this learning object, these algorithms are described at a basic level with the help of simple examples. Juan Císcar, A.; Sanchis Navarro, JA.; Civera Saiz, J. (2019). Forward and Backward algorithms. http://hdl.handle.net/10251/122821