本文研究了有限维广义Witt李超代数W的二阶上同调群H^2(W,F),其中F是一个特征p〉2的代数封闭域.通过计算W到W^*的导子,得到H^2(W,F)是平凡的.应用此结果,我们可得W的中心扩张是平凡的.
In this article,we study the second cohomology group H^2(W,F) of the finite dimensional generalized Witt Lie superalgebra W,where F is an algebracially closed field of characteristic p2.By computing the derivations of W to W^*,we obtain H^2(W,F) is trivial.As applications,we determine the central extension of W is trivial.