Use this URL to cite or link to this record in EThOS: | https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.668273 |
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Title: | Irreducible components of the restricted nilpotent commuting variety of G2, F4 and E6 in good characteristic | ||||||
Author: | Johnson, Heather |
ISNI:
0000 0004 5366 2366
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Awarding Body: | Lancaster University | ||||||
Current Institution: | Lancaster University | ||||||
Date of Award: | 2015 | ||||||
Availability of Full Text: |
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Abstract: | |||||||
Let N1 denote the restricted nullcone of the Lie algebra g of a simple algebraic group in characteristic p>0, i.e. the set of x∈g such that x|p| = 0. For representatives e1,...,en of the nilpotent orbits of g we find the irreducible components of gei∩N1 for g = G2 and F4 in good characteristic p. We do the same for g = E6 with the exception of three nilpotent orbits. We use this information to determine the irreducible components of the restricted nilpotent commuting variety C1nil(g)= {(x,y) ∈ N1×N1 : [x,y] = 0} for g = G2 and F4. We do the same for g = E6 with the exception of when p=7 where we describe C1nil(g) as the union of an irreducible set of dimension 78 and one of dimension 76 which may or may not be an irreducible component.
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Supervisor: | Levy, Paul ; Towers, David | Sponsor: | Not available | ||||
Qualification Name: | Thesis (Ph.D.) | Qualification Level: | Doctoral | ||||
EThOS ID: | uk.bl.ethos.668273 | DOI: | Not available | ||||
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