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Representations of quivers over finite fieldsHua, Jiuzhao , Mathematics & Statistics, Faculty of Science, UNSW January 1998 (has links)
The main purpose of this thesis is to obtain surprising identities by counting the representations of quivers over finite fields. A classical result states that the dimension vectors of the absolutely indecomposable representations of a quiver ?? are in one-to-one correspondence with the positive roots of a root system ??, which is infinite in general. For a given dimension vector ?? ??? ??+, the number A??(??, q), which counts the isomorphism classes of the absolutely indecomposable representations of ?? of dimension ?? over the finite field Fq, turns out to be a polynomial in q with integer coefficients, which have been conjectured to be nonnegative by Kac. The main result of this thesis is a multi-variable formal identity which expresses an infinite series as a formal product indexed by ??+ which has the coefficients of various polynomials A??(??, q) as exponents. This identity turns out to be a qanalogue of the remarkable Weyl-Macdonald-Kac denominator identity modulus a conjecture of Kac, which asserts that the multiplicity of ?? is equal to the constant term of A??(??, q). An equivalent form of this conjecture is established and a partial solution is obtained. A new proof of the integrality of A??(??, q) is given. Three Maple programs have been included which enable one to calculate the polynomials A??(??, q) for quivers with at most three nodes. All sample out-prints are consistence with Kac???s conjectures. Another result of this thesis is as follows. Let A be a finite dimensional algebra over a perfect field K, M be a finitely generated indecomposable module over A ???K ??K. Then there exists a unique indecomposable module M??? over A such that M is a direct summand of M??? ???K ??K, and there exists a positive integer s such that Ms = M ??? ?? ?? ?? ??? M (s copies) has a unique minimal field of definition which is isomorphic to the centre of End ??(M???) rad (End ??(M???)). If K is a finite field, then s can be taken to be 1.
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Some irreducible characters of groups with BN pairs / by R.B. HowlettHowlett, Robert Brian January 1975 (has links)
iii, 66 leaves ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Pure Mathematics, 1976
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Groups admitting a fixed-point-free group of automorphisms isomorphic to S3 /Dolman, Barry E. January 1983 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, 1984. / Dated 1983. Includes bibliographical references (leaves 143-145).
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Finite-difference methods for the diffusion equation /Hayman, Kenneth John. January 1988 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, 1988. / Includes bibliographical references (leaves 264-267).
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Explicit Brauer Induction and Shintani descent.McCudden, Brian. Snaith, Victor. Unknown Date (has links)
Thesis (Ph. D.)--McMaster University (Canada), 1993. / Source: Dissertation Abstracts International, Volume: 54-12, Section: B, page: 6240. Adviser: V.P. Snaith.
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Simulation of electromechanical actuators using the finite integration techniqueFunieru, Mariana. Unknown Date (has links)
Techn. University, Diss., 2007--Darmstadt.
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Reduction methods in finite element analysis of nonlinear structural dynamics /Spiess, Holger. January 2006 (has links)
Zugl.: Hannover, University, Diss., 2006.
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Parametric sensitivity analysis of microscrewsWitzgall, Zachary F. January 2006 (has links)
Thesis (M.S.)--West Virginia University, 2006. / Title from document title page. Document formatted into pages; contains xi, 73 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 52-53).
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A new look at the description of reverberent spaces /Jie, Pan. January 1988 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Dept. of Mechanical Engineering, 1989. / Includes bibliographical references (leaves 140-149).
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Finite element techniques applied to the analysis of bus bodies /Close, Andrew Frank. January 1975 (has links) (PDF)
Thesis (M.E.) -- University of Adelaide, Department of Civil Engineering, 1977.
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