机译:四维广义准爱因斯坦流形的全息代数
Marmara Univ, Fac Arts & Sci, Dept Math, Gortepe Campus, TR-34722 Istanbul, Turkey;
Generalized quasi-Einstein manifold; Holonomy; Neutral signature; Lorentz signature; Positive definite signature; RICCI-FLAT MANIFOLDS; PROJECTIVE STRUCTURE; SIGNATURE PLUS; CLASSIFICATION; ADMIT;