منابع مشابه
On Physical States in c < 1 String Theory On Physical States in c < 1 String Theory
The BRST cohomology analysis of Lian and Zuckerman leads to physical states at all ghost number for c < 1 matter coupled to Liouville gravity. We show how these states are related to states at ghost numbers zero(pure vertex operator states – DK states) and ghost number one(ring elements) by means of descent equations. These descent equations follow from the double cohomology of the String BRST ...
متن کاملConformal Algebra and Physical States in a Non - Critical 3 - Brane on R ×
Abstract A world-volume model of a non-critical 3-brane is quantized in a strong coupling phase in which fluctuations of the conformal mode become dominant. This phase, called the conformal-mode dominant phase, is realized at very high energies far beyond the Planck mass scale. We separately treat the conformal mode and the traceless mode and quantize the conformal mode non-perturbatively, whil...
متن کاملA C∗-Algebra on Schur Algebras
In this paper, we show the relation between the Schur algebras Sr Λ,Σ(B) and S r′ Λ,Σ(B), where 1 ≤ r ′ < r < ∞. Then we set up the involution operator in these Schur algebras and show that with this involution operator there is only one C∗-algebra among these classes of Banach algebras. Furthermore, we show the equivalence of a condition on the Schur multiplier norm and the existence of C∗-alg...
متن کاملOn EP elements in a C∗-algebra
We give several characterizations of EP elements in C∗-algebras. The motivation for the factorization results comes in part from a recent paper by Drivaliaris, Karanasios and Pappas on Hilbert space operators. MSC: 46L05, 47A05
متن کاملA Physical Algebra for XML
We present a physical algebra for the manipulation of XML in a database. We show how to map logical algebra operators to this physical algebra. We also present several physical algebra identities that are useful for query optimization. This physical algebra is the basis for the implementation of the TIMBER native XML database system at the University of Michigan.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Acta Mathematica
سال: 1969
ISSN: 0001-5962
DOI: 10.1007/bf02392009