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- From: aap@cs.brown.edu (Andrea A. Pietracaprina)
- Subject: Question regarding PGL groups
- Message-ID: <1993Jan11.150535.16147@cs.brown.edu>
- Originator: dan@symcom.math.uiuc.edu
- Sender: Daniel Grayson <dan@math.uiuc.edu>
- X-Submissions-To: sci-math-research@uiuc.edu
- Organization: Brown Computer Science Dept.
- X-Administrivia-To: sci-math-research-request@uiuc.edu
- Approved: Daniel Grayson <dan@math.uiuc.edu>
- Date: Mon, 11 Jan 1993 15:05:35 GMT
- Lines: 21
-
- Hello,
- does anyone know a solution to the following problem?
-
- Let PGL(2,k) be the Projective General Linear group of 2 X 2 matrices
- with entries from the finite field with k elements, where k is a
- prime power. Let q be an even prime power and n and integer > 2. Consider
- the quotient
-
- PGL(2,q^n) / PGL(2,q)
-
- As known, it consists of [(q^n+1) q^n (q^n-1)] / [(q+1) q (q-1)] elements,
- i.e., cosets of PGL(2,q). Is there an ordering of these cosets such that
- given an index i it is easy to determine the i-th coset? By easy I mean
- requiring *a few* operations in the field.
-
- I would greately appreciate suggestions and/or pointers to the literature.
- Thanks in advance.
-
- andrea pietracaprina
-
-
-