Sympathetic Lie superalgebras are defined and some classical properties of sympathetic Lie superalgebras are given. Among the main results, we prove that any Lie superalgebra $ L $ contains a maximal sympathetic graded ideal and we obtain some properties about sympathetic decomposition. More specifically, we study a general sympathetic Lie superalgebra $ L $ with graded ideals $ I $, $ J $ and $ S $ such that $ L = I\oplus J $ and $ L/S $ is a sympathetic Lie superalgebra, and we obtain some properties of $ L/S $. Furthermore, under certain assumptions on $ L $ we prove that the derivation algebra $ \mathrm{Der}(L) $ is sympathetic and that if in addition $ L $ is indecomposable, then $ \mathrm{Der}(L) $ is simply sympathetic.
Citation: Yusi Fan, Chenrui Yao, Liangyun Chen. Structure of sympathetic Lie superalgebras[J]. Electronic Research Archive, 2021, 29(5): 2945-2957. doi: 10.3934/era.2021020
Sympathetic Lie superalgebras are defined and some classical properties of sympathetic Lie superalgebras are given. Among the main results, we prove that any Lie superalgebra $ L $ contains a maximal sympathetic graded ideal and we obtain some properties about sympathetic decomposition. More specifically, we study a general sympathetic Lie superalgebra $ L $ with graded ideals $ I $, $ J $ and $ S $ such that $ L = I\oplus J $ and $ L/S $ is a sympathetic Lie superalgebra, and we obtain some properties of $ L/S $. Furthermore, under certain assumptions on $ L $ we prove that the derivation algebra $ \mathrm{Der}(L) $ is sympathetic and that if in addition $ L $ is indecomposable, then $ \mathrm{Der}(L) $ is simply sympathetic.