10 research outputs found
On Z-gradations of twisted loop Lie algebras of complex simple Lie algebras
We define the twisted loop Lie algebra of a finite dimensional Lie algebra
as the Fr\'echet space of all twisted periodic smooth mappings
from to . Here the Lie algebra operation is
continuous. We call such Lie algebras Fr\'echet Lie algebras. We introduce the
notion of an integrable -gradation of a Fr\'echet Lie algebra, and
find all inequivalent integrable -gradations with finite dimensional
grading subspaces of twisted loop Lie algebras of complex simple Lie algebras.Comment: 26 page
Examining the Context of Strategy Instruction
The goal of literacy instruction is to teach reading and writing as tools to facilitate thinking and reasoning in a broad array of literacy events. An important difference in the disposition of children to participate in literacy experiences is the extent to which they engage in intentional self-regulated learning. The contexts attending six traditional models of strategy instruction are examined. An exploratory study, conducted with heterogeneous third graders, is reported, examining the implementation and outcomes of three models of strategy instruction—Direct Instruction, Reciprocal Teaching, and Collaborative Problem Solving—which manipulated teacher and student control of activity, as well as the instructional context.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/69008/2/10.1177_074193259101200306.pd
On Global Aspects Of Gauged Wess-Zumino-Witten Model
This is a thesis for Rigaku-Hakushi( Ph. D.). It clarifies the
geometric meaning and field theoretical consequences of the spectral flows
acting on the space of states of the ` coset model'. As suggested by Moore
and Seiberg, the spectral flow is realized as the response of states to certain
change of background gauge field together with the gauge transformation on a
circle. Applied to the boundary circle of a disc with field insertion, such a
realization leads to a certain relation among correlators of the gauged WZW
model for various principal -bundles. In the course of derivation, we find
an expression of a (dressed) gauge invariant field as an integral over the flag
manifold of and an expression of a correlator as an integral over a certain
moduli space of holomorphic -bundles with quasi-flag structure at the insertion point. We also find
that the gauge transformation on the circle corresponding to the spectral flow
determines a bijection of the set of isomorphism classes of holomorphic -bundles with quasi-flag structure of one topological type to that of
another. As an application, it is pointed out that problems arising from the
field identification fixed points may be resolved by taking into account of all
principal -bundles.Comment: (Thesis) 125 pages, UT-Komaba/94-3 (Latex errors are corrected