bio  website  math.umass.edu/~jeh 

location  U. Massachusetts, Amherst  
age  75  
visits  member for  4 years, 11 months 
seen  7 hours ago  
stats  profile views  15,293 
Moreorless retired professor at UMass Amherst.
Basically an algebraist with interests in Lie theory,
specifically representation theory and related
algebraic geometry.
1d

comment 
Tensor products of Weyl modules in positive characteristic
@Konstantin: In 2014 I got around to writing up some informal notes on "Weyl modules" (and their duals), which might clarify the transition in terminology which Chuck commented on. See people.math.umass.edu/~jeh/pub/weyl.pdf 
1d

awarded  Nice Answer 
2d

comment 
What Is The Minimal Monomial of the Symmetric Group?
The question looks quite nontrivial, but is there some specific motivation for it? 
Jan 24 
comment 
the number of indecomposable modules of finite groups over finite fields of a fixed dimension
As Derek points out, the formulation is not quite clear. Usually a conjecture as general as this is based on some computational evidence for typical small groups, so it's relevant to ask what examples you've studied. (Also, more tags such as 'finitegroups' and 'rt.representationtheory' are needed.) 
Jan 23 
comment 
Bruhat order in homogeneous spaces
Too many questions here! Also, the first one has an obvious answer in rank 1, where the simple root is twice the corresponding fundamental weight. (See the Bourbaki tables for explicit results on other types.) 
Jan 23 
comment 
Special linear groups over function fields
There is quite a bit of related literature. The English translation of Serre's monograph is listed here: ams.org/mathscinetgetitem?mr=1954121, but there are also lots of papers such as ams.org/mathscinetgetitem?mr=0114866 and ams.org/mathscinetgetitem?mr=1177335 
Jan 23 
comment 
Subquotients in the Verma filtration on Verma modules
@Allen: There are several fine points to add if you want a real algorithm, but my edited answer is already getting too long. 
Jan 22 
comment 
Elements of order 3 normalizing no nonidentity 2subgroups in Almost Simple Groups
@Geoff: Maybe add a tag such as 'finitegroups'. I suppose the classification of simple groups is needed here? 
Jan 22 
revised 
Subquotients in the Verma filtration on Verma modules
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Jan 21 
comment 
Subquotients in the Verma filtration on Verma modules
@Allen: Yes, the lower rank type A examples are often misleadingly wellbehaved. Best to be skeptical. 
Jan 20 
revised 
What is modular representation theory for groups good for?
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Jan 20 
answered  What is modular representation theory for groups good for? 
Jan 20 
comment 
Canonical basis of quantum groups
Note that Lusztig's paper is freely available online and has some discussion of low rank examples in 3.4 including this rank 1 case: ams.org/mathscinetgetitem?mr=1035415 (see also the answer to your June question on canonical bases). 
Jan 20 
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PBW basis and canonical basis
This is illustrated in Lusztig's original J.A.M.S. (1990) paper in low rank examples. Also, some computational methods are given in papers by W.A. deGraaf: ams.org/mathscinetgetitem?mr=1959260, ams.org/mathscinetgetitem?mr=1987542 
Jan 20 
comment 
What is modular representation theory for groups good for?
This is an extremely openended question, which may or may not be suitable for this forum but doesn't have a single answer. Should it be communitywiki? 
Jan 19 
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Computing maximal ideals of a Lie algebra
It might still be helpful to ask him directly by email (I think he is now at the University of Trento in Italy), since he is quite experienced with Lie algebra algorithms. 
Jan 19 
revised 
Convention about “long” roots for simple Lie algebras of types ADE?
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Jan 19 
comment 
Computing maximal ideals of a Lie algebra
Have you looked at W.A. de Graaf's book ams.org/mathscinetgetitem?mr=1743970 (or his papers)? 
Jan 19 
revised 
Convention about “long” roots for simple Lie algebras of types ADE?
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Jan 16 
comment 
Number of Irreducible Representations of $U_q(n)$ of Dimension $n$?
@Ajabnaz: One other comment is that $N$ in your heading should be $n$. 