%0 Journal Article %A Céline Righi %A Rupert W. T. Yu %T On the Index of the Quotient of a Borel Subalgebra by an ad-Nilpotent Ideal %J Journal of Lie Theory %D 2010 %P 49-63 %V 20 %N 1 %U http://geodesic.mathdoc.fr/item/JOLT_2010_20_1_a4/ %F JOLT_2010_20_1_a4