Geodesic
Multiparameter eigenvalue probolems: Jordan semilattices of vectors
Zapiski Nauchnykh Seminarov POMI, Computational methods and algorithms. Part X, Tome 219 (1994), pp. 213-220 
V. B. Khazanov. Multiparameter eigenvalue probolems: Jordan semilattices of vectors. Zapiski Nauchnykh Seminarov POMI, Computational methods and algorithms. Part X, Tome 219 (1994), pp. 213-220. http://geodesic.mathdoc.fr/item/ZNSL_1994_219_a9/
@article{ZNSL_1994_219_a9,
     author = {V. B. Khazanov},
     title = {Multiparameter eigenvalue probolems: {Jordan} semilattices of vectors},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {213--220},
     year = {1994},
     volume = {219},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1994_219_a9/}
}
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

The notion of a Jordan semilattice of vectors of the multiparameter eigenvalue problems for matrices is introduced as a generalization of a well-known notion of the Jordan chain of vectors. A relationship between a Jordan semilattice of vectors of the linear multiparameter eigenvalue problems and Jordan chains of vectors of eigenvalue problems for matrices is established. Bibliography: 5 titles.