scholarly journals Lie nilpotency index of a modular group algebra

2020 ◽  
pp. 2150129
Author(s):  
Meena Sahai ◽  
Bhagwat Sharan
Keyword(s):  
Group Algebra ◽  
Modular Group ◽  
Index Formula ◽  
Group Algebras ◽  
Modular Group Algebra ◽  
Nilpotency Index

In this paper, we classify the modular group algebra [Formula: see text] of a group [Formula: see text] over a field [Formula: see text] of characteristic [Formula: see text] having upper Lie nilpotency index [Formula: see text] for [Formula: see text] and [Formula: see text]. Group algebras of upper Lie nilpotency index [Formula: see text] for [Formula: see text], have already been characterized completely.

Lie nilpotency indices of modular group algebras II

2018 ◽  
Vol 11 (06) ◽  
pp. 1850087 ◽  
Author(s):  
Meena Sahai ◽  
Reetu Siwach ◽  
R. K. Sharma
Keyword(s):  
Group Algebra ◽  
Modular Group ◽  
Index Formula ◽  
Group Algebras ◽  
Modular Group Algebra ◽  
Nilpotency Index

Let [Formula: see text] be the modular group algebra of a group [Formula: see text] over a field [Formula: see text] of characteristic [Formula: see text]. The classification of the group algebras [Formula: see text] with upper Lie nilpotency index [Formula: see text] greater than or equal to [Formula: see text] has already been done. In this paper, we determine the group algebras [Formula: see text] such that [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] or [Formula: see text].

Modular group algebras of Lie nilpotency index 8p − 6

2018 ◽  
Vol 11 (03) ◽  
pp. 1850039 ◽  
Author(s):  
Meena Sahai ◽  
Bhagwat Sharan
Keyword(s):  
Group Algebra ◽  
Modular Group ◽  
Index Formula ◽  
Group Algebras ◽  
Index Group ◽  
Modular Group Algebra ◽  
Nilpotency Index

For a group algebra [Formula: see text] of a group [Formula: see text] over a field [Formula: see text] of characteristic [Formula: see text], it is well known that [Formula: see text] is the minimal upper as well as the minimal lower Lie nilpotency index. Group algebras of upper Lie nilpotency index upto [Formula: see text] have already been characterized completely. In this paper, we classify the modular group algebra [Formula: see text] having upper Lie nilpotency index [Formula: see text] which is the possible next higher Lie nilpotency index.

Modular Group Algebras with Small Upper Lie Nilpotency Index

2020 ◽  
Vol 12 (1) ◽  
pp. 108-111
Author(s):  
Suchi Bhatt ◽  
Harish Chandra
Keyword(s):  
Group Algebra ◽  
Modular Group ◽  
Group Algebras ◽  
Modular Group Algebra ◽  
Nilpotency Index

Let KG be the modular group algebra of a group G over a field K of characteristic p > 0. The classification of group algebras KG with upper Lie nilpotency index tL(KG) greater than or equal to |G′| – 13p + 14 have already been done. In this paper, our aim is to classify the group algebras KG for which tL(KG) = |G′| – 14p + 15.

A note on the upper Lie nilpotency index of a group algebra

2019 ◽  
Vol 12 (07) ◽  
pp. 2050010 ◽  
Author(s):  
Meena Sahai ◽  
Bhagwat Sharan
Keyword(s):  
Group Algebra ◽  
Modular Group ◽  
Index Formula ◽  
Modular Group Algebra ◽  
Nilpotency Index

In this paper, we classify the modular group algebra [Formula: see text] of a group [Formula: see text] over a field [Formula: see text] of characteristic [Formula: see text] having upper Lie nilpotency index [Formula: see text]. The group algebra [Formula: see text] with [Formula: see text] has already been described.

scholarly journals Lie Nilpotency Indices of Modular Group Algebras

2010 ◽  
Vol 17 (01) ◽  
pp. 17-26 ◽  
Author(s):  
V. Bovdi ◽  
J. B. Srivastava
Keyword(s):  
Group Algebra ◽  
Modular Group ◽  
Commutator Subgroup ◽  
Positive Characteristic ◽  
Group Algebras ◽  
Characteristic P ◽  
Nilpotency Index ◽  
Field Of Positive Characteristic

Let K be a field of positive characteristic p and KG the group algebra of a group G. It is known that if KG is Lie nilpotent, then its upper (or lower) Lie nilpotency index is at most |G′| + 1, where |G′| is the order of the commutator subgroup. The class of groups G for which these indices are maximal or almost maximal has already been determined. Here we determine G for which upper (or lower) Lie nilpotency index is the next highest possible.

The Characterisation of Modular Group Algebras Having Unit Groups of Nilpotency Class 3

1995 ◽  
Vol 38 (1) ◽  
pp. 112-116 ◽  
Author(s):  
M. Anwar Rao ◽  
Robert Sandling
Keyword(s):  
Group Algebra ◽  
Modular Group ◽  
Unit Group ◽  
Nilpotency Class ◽  
Group Algebras ◽  
Modular Group Algebra

AbstractThe unit group of the modular group algebra of a finite p-group in characteristic p is nilpotent. The p-groups for which it is of nilpotency class 3 were determined in work of Coleman, Passman, Shalev and Mann when p ≥ 3. We resolve the p = 2 case here which completes the classification.

A note on Lie nilpotent group algebras

2019 ◽  
Vol 18 (09) ◽  
pp. 1950163
Author(s):  
Meena Sahai ◽  
Bhagwat Sharan
Keyword(s):  
Abelian Group ◽  
Nilpotent Group ◽  
Group Algebra ◽  
Upper Bound ◽  
Finite Abelian Group ◽  
Index Formula ◽  
Group Algebras ◽  
Arbitrary Group ◽  
Nilpotency Index

Let [Formula: see text] be an arbitrary group and let [Formula: see text] be a field of characteristic [Formula: see text]. In this paper, we give some improvements of the upper bound of the lower Lie nilpotency index [Formula: see text] of the group algebra [Formula: see text]. We also give improved bounds for [Formula: see text], where [Formula: see text] is the number of independent generators of the finite abelian group [Formula: see text]. Furthermore, we give a description of the Lie nilpotent group algebra [Formula: see text] with [Formula: see text] or [Formula: see text]. We also show that for [Formula: see text] and [Formula: see text], [Formula: see text] if and only if [Formula: see text], where [Formula: see text] is the upper Lie nilpotency index of [Formula: see text].

scholarly journals The modular group algebra problem for groups of order p5

1996 ◽  
Vol 61 (2) ◽  
pp. 229-237 ◽  
Author(s):  
Mohamed A. M. Salim ◽  
Robert Sandling
Keyword(s):  
Group Algebra ◽  
Modular Group ◽  
Nilpotency Class ◽  
Group Algebras ◽  
Modular Group Algebra

AbstractWe show that p-groups of order p5 are determined by their group algebras over the field of p elements. Many cases have been dealt with in earlier work of ourselves and others. The only case whose details remain to be given here is that of groups of nilpotency class 3 for p odd.

The Modular Group Algebra Problem for Small p-Groups Of Maximal Class

1996 ◽  
Vol 48 (5) ◽  
pp. 1064-1078
Author(s):  
Mohamed A. M. Salim ◽  
Robert Sandling
Keyword(s):  
Small Group ◽  
Group Algebra ◽  
Modular Group ◽  
Unit Group ◽  
Quotient Algebra ◽  
Group Algebras ◽  
Maximal Class ◽  
Modular Group Algebra

AbstractWe show that p-groups of maximal class and order p5 are determined by their group algebras over the field of p elements. The most important information requisite for the proof is obtained from a detailed study of the unit group of a quotient algebra of the group algebra, larger than the small group algebra.

COMMUTATOR IDENTITIES ON SYMMETRIC ELEMENTS OF GROUP ALGEBRAS

2013 ◽  
Vol 12 (08) ◽  
pp. 1350044
Author(s):  
TIBOR JUHÁSZ ◽  
ENIKŐ TÓTH
Keyword(s):  
Direct Product ◽  
Group Algebra ◽  
Group Algebras ◽  
Augmentation Ideal ◽  
Characteristic P ◽  
Derived Length ◽  
Commutator Identity ◽  
Nilpotency Index ◽  
Powerful Group

Let K be a field of odd characteristic p, and let G be the direct product of a finite p-group P ≠ 1 and a Hamiltonian 2-group. We show that the set of symmetric elements (KG)* of the group algebra KG with respect to the involution of KG which inverts all elements of G, satisfies all Lie commutator identities of degree t(P) or more, where t(P) denotes the nilpotency index of the augmentation ideal of the group algebra KP. In addition, if P is powerful, then (KG)* satisfies no Lie commutator identity of degree less than t(P). Applying this result we get that (KG)* is Lie nilpotent and Lie solvable, and its Lie nilpotency index and Lie derived length are not greater than t(P) and ⌈ log 2 t(P)⌉, respectively, and these bounds are attained whenever P is a powerful group. The corresponding result on the set of symmetric units of KG is also obtained.

Sign in / Sign up

Export Citation Format

Share Document