18,452 research outputs found
Entry strategy concepts, determinants and options of US firms into Romania
This article looks at entry strategy concepts and options, taking into account cultural and organizational parameters which influence success. Export, licensing and distribution, as well as joint ventures and facilities management are critically examined, from the point of view of the foreign companies intending to access Romanian market.strategic marketing, entry strategies, US companies, Romanian market.
The innovation misstep
The author makes the case that cause of innovation to battle commoditization is far too often lost even before it starts. The dysfunctional distribution system has been turned on its head as distributors have wrested control of the strategic prerogatives of manufacturers in order to capture a disproportionate share of the value of the supplying company’s products. Mega distributors like Wal-Mart Stores Inc. and Home Depot Inc. end up profiting at the expense of their vendors, and manufacturers earn little or nothing on the sale of their own innovated products. The mega distributors not only control the delivery of their products to consumers but also wield tremendous power over their internal processes, further reducing the value of the innovation. There is some hope: if done right, manufacturers still possess the ability to directly influence what happens to their innovations products once they enter the distribution chain, but, this window is rapidly closing.innovation management; sales and distribution strategy; direct marketing; channel control.
Orbifolds of symplectic fermion algebras
We present a systematic study of the orbifolds of the rank symplectic
fermion algebra , which has full automorphism group .
First, we show that and are
-algebras of type and
, respectively. Using these results, we find
minimal strong finite generating sets for and
for all . We compute the characters of the
irreducible representations of and
appearing inside , and
we express these characters using partial theta functions. Finally, we give a
complete solution to the Hilbert problem for ; we show that for
any reductive group of automorphisms, is strongly
finitely generated.Comment: Exposition streamlined, some new results added in Section 5,
references added. arXiv admin note: text overlap with arXiv:1205.446
A commutant realization of Odake's algebra
The bc\beta\gamma-system W of rank 3 has an action of the affine vertex
algebra V_0(sl_2), and the commutant vertex algebra C =Com(V_0(sl_2), W)
contains copies of V_{-3/2}(sl_2) and Odake's algebra O. Odake's algebra is an
extension of the N=2 superconformal algebra with c=9, and is generated by eight
fields which close nonlinearly under operator product expansions. Our main
result is that V_{-3/2}(sl_2) and O form a Howe pair (i.e., a pair of mutual
commutants) inside C. More generally, any finite-dimensional representation of
a Lie algebra g gives rise to a similar Howe pair, and this example corresponds
to the adjoint representation of sl_2.Comment: Minor corrections, discussion of Odake's algebra in Section 2
expanded, final versio
Cosets of the -algebra
Let be the universal
-algebra associated to with its subregular
nilpotent element, and let be its simple quotient. There is a Heisenberg subalgebra
, and we denote by the coset
,
and by its simple quotient. We show that for
where is an integer greater than and is coprime to ,
is isomorphic to a rational, regular -algebra
. In particular,
is a simple current
extension of the tensor product of with a rank one lattice vertex operator algebra, and hence is
rational.Comment: 14 pages, to appear in conference proceedings for AMS Special Session
on Vertex Algebras and Geometr
Cosets of affine vertex algebras inside larger structures
Given a finite-dimensional reductive Lie algebra equipped with
a nondegenerate, invariant, symmetric bilinear form , let
denote the universal affine vertex algebra associated to
and at level . Let be a vertex
(super)algebra admitting a homomorphism . Under some technical conditions on , we
characterize the coset for
generic values of . We establish the strong finite generation of this coset
in full generality in the following cases: , , and . Here and are
finite-dimensional Lie (super)algebras containing , equipped with
nondegenerate, invariant, (super)symmetric bilinear forms and which
extend , is fixed, and is a free field
algebra admitting a homomorphism .
Our approach is essentially constructive and leads to minimal strong finite
generating sets for many interesting examples. As an application, we give a new
proof of the rationality of the simple superconformal algebra with
for all positive integers .Comment: Some errors corrected, final versio
W-algebras as coset vertex algebras
We prove the long-standing conjecture on the coset construction of the
minimal series principal -algebras of types in full generality. We do
this by first establishing Feigin's conjecture on the coset realization of the
universal principal -algebras, which are not necessarily simple. As
consequences, the unitarity of the "discrete series" of principal -algebras
is established, a second coset realization of rational and unitary -algebras
of type and are given and the rationality of Kazama-Suzuki coset vertex
superalgebras is derived.Comment: Minor corrections and typos fixed. Proposition 3.4 is strengthened,
which simplifies the proofs of Lemma 5.2 and Lemma 8.1. Final version to
appear in Invent. Mat
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