Journal of Prime Research in Mathematics

# On realizations of the steenrod algebras

Alexei Lebedev
MPIMiS, Inselstr. 22, DE-04103 Leipzig, Germany.

Dimitry Leites

MPIMiS, Inselstr. 22, DE-04103 Leipzig, Germany.

$$^{2}$$Corresponding Author: leites@mis.mpg.de

### Abstract

The Steenrod algebra can not be realized as an enveloping of any Lie superalgebra. We list several problems that suggest a need to modify the definition of the enveloping algebra, for example, to get rid of certain strange deformations which we qualify as an artifact of the inadequate definition of the enveloping algebra in positive characteristic. P. Deligne appended our paper with his comments, hints and open problems

#### Keywords:

Lie algebras, Lie superalgebras, Steenrod algebras.