11 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
4 papers
Symmetries of modified Dirac operators in supergravity flux backgrounds
Ümit Ertem
Modifications of Dirac operators in supergravity flux backgrounds are considered. Modified spin curvature operators and squares of modified Dirac operators corresponding to Schrödi…
Choices of spinor inner products on M-theory backgrounds
Ümit Ertem, Özgün Sütemen, Özgür Açık +1
M-theory backgrounds in the form of unwarped compactifications with or without fluxes are considered. We construct the bilinear forms of supergravity Killing spinors for different…
Generalized symmetry superalgebras
Özgür Açık, Ümit Ertem
We generalize the symmetry superalgebras of isometries and geometric Killing spinors on a manifold to include all the hidden symmetries of the manifold generated by Killing spinors…
Twistor spinors and extended conformal superalgebras
Ümit Ertem
We show that the first-order symmetry operators of twistor spinors can be constructed from conformal Killing-Yano forms in conformally-flat backgrounds. We express the conditions o…