Embeddability and rate identifiability of Kimura 2-parameter matrices

Marta Casanellas, Jesús Fernández-Sánchez, Jordi Roca-Lacostena

Deciding whether a Markov matrix is embeddable (i.e. can be written as the exponential of a rate matrix) is an open problem even for $4\times 4$ matrices. We study the embedding pr…