A LICHNEROWICZ-TYPE RESULT ON A SEVEN-DIMENSIONAL QUATERNIONIC CONTACT MANIFOLD

ЗаглавиеA LICHNEROWICZ-TYPE RESULT ON A SEVEN-DIMENSIONAL QUATERNIONIC CONTACT MANIFOLD
Вид публикацияJournal Article
Година на публикуване2013
АвториPetkov A
СписаниеAnnuaire de l’Université de Sofia “St. Kliment Ohridski”. Faculté de Mathématiques et Informatique
Том101
ключови думи3-Sasakian, First Eigenvalue, Lichnerowicz Inequality, Quaternionic Contact Structures, Sub-Laplacian
Резюме

In this paper we establish an analogue of the classical Lichnerowicz' theorem giving a sharp lower bound of the rst non-zero eigenvalue of the sub-Laplacian on a compact seven-dimensional quaternionic contact manifold, assuming a lower bound of the qc-Ricci tensor, torsion tensor and its distinguished covariant derivatives.

2000 MSC

main 53C21, secondary 58J60, 53C17, 35P15, 53C25

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