why is the shape of log likelihood concave what kind of log likelihood should baum welch be should log likelihood curve always be concave in baum welch is baumwelch concave what is baum welch concavity log likelihood baum welch concavity log likelihood baumwelch model concave baumwelch concavity log likelihood what is log likelihood curve why is the log likelihood curve concave concavity log likelihood training baumwelch why are log likelihood curves concave which model is concave how do you train baumwelch when to use log likelihood model in hidden markov model is the log likelihood always concave when training baumwelch should log likelihood curve be concave should baumwelch model curve be concave? what is the shape of the curve of log likelihood obtained from the iteration of baumwelch is baumwelch always concave