When was the developer of the actantial model died?
Algirdas Julien Greimas Algirdas Julien Greimas (] ; born "Algirdas Julius Greimas"; 9 March 1917 – 27 February 1992), was a French-Lithuanian literary scientist, known among other things for the Greimas Square ("le carré sémiotique"). He is, along with Roland Barthes, considered the most prominent of the French semioticians. With his training in structural linguistics, he added to the theory of signification and laid the foundations for the Parisian school of semiotics. Among Greimas's major contributions to semiotics are the concepts of isotopy, the actantial model, the narrative program, and the semiotics of the natural world. He also researched Lithuanian mythology and Proto-Indo-European religion, and was influential in semiotic literary criticism.
Edward Yourdon Edward Nash Yourdon (April 30, 1944 – January 20, 2016) was an American software engineer, computer consultant, author and lecturer, and pioneer in the software engineering methodology. He was known as one of the lead developers of the structured analysis techniques of the 1970s and as a co-developer of the Yourdon/Whitehead method for object-oriented analysis/design in the late 1980s and the Coad/Yourdon methodology for object-oriented analysis/design in the 1990s.