It has been influential to Eastern thinkers, including Buddhist semioticians. He was one of the most distinguished semioticians in Mexico and Latin America. He is, along with Roland Barthes, considered the most prominent of the French semioticians. Succeeding these founders were numerous philosophers and linguists who defined themselves as semioticians. Philosophers of language and semioticians construct and analyze theories of knowledge transfer or communication. Methods of formal linguistics were introduced by semioticians such as Charles Peirce and Louis Hjelmslev. Some semioticians focus on the logical dimensions of the science, however. These semioticians have each brought their own concerns to the study of signs.