Cohomology and deformations of restricted Lie algebras and their morphisms in positive characteristic

The main purpose of this paper is to study cohomology and develop a deformation theory of restricted Lie algebras in positive characteristic $$$p$$$ > $$$0$$$. In the case $$$p\geq3$$$, it is shown that the deformations of restricted Lie algebras are controlled by the restricted cohomology introduced by Evans and Fuchs. Moreover, we introduce a new cohomology that controls the deformations of restricted morphisms of restricted Lie algebras. In the case $$$p=2$$$, we provide a full restricted cohomology complex with values in a restricted module and investigate its connections with formal deformations. Furthermore, we introduce a full deformation cohomology that controls deformations of restricted morphisms of restricted Lie algebras in characteristic $$$2$$$. As example, we discuss restricted cohomology with adjoint coefficients of restricted Heisenberg Lie algebras in characteristic $$$p\geq 2$$$.

The main purpose of this paper is to study cohomology and develop a deformation theory of restricted Lie algebras in positive characteristic $$$p$$$ > $$$0$$$. In the case $$$p\geq3$$$, it is shown that the deformations of restricted Lie algebras are controlled by the restricted cohomology introduced by Evans and Fuchs. Moreover, we introduce a new cohomology that controls the deformations of restricted morphisms of restricted Lie algebras. In the case $$$p=2$$$, we provide a full restricted cohomology complex with values in a restricted module and investigate its connections with formal deformations. Furthermore, we introduce a full deformation cohomology that controls deformations of restricted morphisms of restricted Lie algebras in characteristic $$$2$$$. As example, we discuss restricted cohomology with adjoint coefficients of restricted Heisenberg Lie algebras in characteristic $$$p\geq 2$$$.

Modular Lie algebra restricted cohomology deformation

Modular Lie algebra restricted cohomology deformation