24,784 research outputs found
A relation between chiral central charge and ground state degeneracy in 2+1-dimensional topological orders
A bosonic topological order on -dimensional closed space may
have degenerate ground states. The space with different shapes
(different metrics) form a moduli space . Thus the
degenerate ground states on every point in the moduli space form a complex vector bundle over . It was
suggested that the collection of such vector bundles for -dimensional closed
spaces of all topologies completely characterizes the topological order. Using
such a point of view, we propose a direct relation between two seemingly
unrelated properties of 2+1-dimensional topological orders: (1) the chiral
central charge that describes the many-body density of states for edge
excitations (or more precisely the thermal Hall conductance of the edge), (2)
the ground state degeneracy on closed genus surface. We show that for bosonic topological orders. We explicitly
checked the validity of this relation for over 140 simple topological orders.
For fermionic topological orders, let ()
be the degeneracy with even (odd) number of fermions for genus- surface with
spin structure . Then we have and
for .Comment: 8 pages. This paper supersedes Section XIV of an unpublished work
arXiv:1405.5858. We add new results on fermionic topological orders and some
numerical check
Entrepreneurship Education and Entrepreneurial Intention: Perspectives on Institutional Theory
Entrepreneurial intentions have been considered a critical element understanding the formation of new venture creations that have been seen in creating jobs and economic growth in a country. This study draws upon institutional environment theory to clarify and test the model using multiple linear regression on entrepreneurship education and three determinants of institutional environment dimensions, namely, regulatory, cogni-tive, and normative dimensions toward entrepreneurial intentions in the context of Esto-nia. A questionnaire-based survey on 265 Estonian university students was conducted to validate the hypotheses of the study. The results suggest that entrepreneurship education has a significant influence on university studentsβ entrepreneurial intention. Additionally, all three institutional environment determinants moderate the positive relationship be-tween entrepreneurship education and entrepreneurial intention. Interestingly, interaction terms among normative environment, entrepreneurship education, and entrepreneurial intention are statistically significant. Therefore, the results of this study advance institu-tional theory and its application in entrepreneurship research in the context of Estonia.
Research paper
Keywords: Entrepreneurship education, Entrepreneurial intentions, Institutional environment theory, Estonia, University students
Reference to this paper should be made as follows: Wannamakok, W., & Liang, W. (2019). Entrepreneurship Education and Entrepreneurial Intention: Perspectives on Institutional Theory, Journal of Entrepreneurship, Business and Economics, 7(2), 106β129. 
Vanishing Mean Oscillation Spaces Associated with Operators Satisfying Davies-Gaffney Estimates
Let be a metric measure space, a linear operator
which has a bounded functional calculus and satisfies the
Davies-Gaffney estimate, a concave function on of critical
lower type and for
all . In this paper, the authors introduce the generalized VMO
space associated with , and
establish its characterization via the tent space. As applications, the authors
show that , where denotes the adjoint operator of in
and the Banach completion of the Orlicz-Hardy
space .Comment: 40 pages, Kyoto J. Math. (to appear
Regularized Wasserstein Means for Aligning Distributional Data
We propose to align distributional data from the perspective of Wasserstein
means. We raise the problem of regularizing Wasserstein means and propose
several terms tailored to tackle different problems. Our formulation is based
on the variational transportation to distribute a sparse discrete measure into
the target domain. The resulting sparse representation well captures the
desired property of the domain while reducing the mapping cost. We demonstrate
the scalability and robustness of our method with examples in domain
adaptation, point set registration, and skeleton layout
Mining Circumgalactic Baryons in the Low-Redshift Universe
(Abridged) This paper presents an absorption-line study of the multiphase
circumgalactic medium (CGM) based on observations of Lya, CII, CIV, SiII,
SiIII, and SiIV absorption transitions in the vicinities of 195 galaxies at
redshift z<0.176. The galaxy sample is established based on a cross-comparison
between public galaxy and QSO survey data and is characterized by a median
redshift of =0.041, a median projected distance of =362 kpc to the
sightline of the background QSO, and a median stellar mass of log(M_star/M_sun)
= 9.7 \pm 1.1. Comparing the absorber features identified in the QSO apectra
with known galaxy properties has led to strong constraints for the CGM
absorption properties at z<~0.176. First, abundant hydrogen gas is observed out
to d~500 kpc, well beyond the dark matter halo radius Rh of individual
galaxies, with a mean covering fraction of ~60%. In contrast, no heavy elements
are detected at d>~0.7 Rh from either low-mass dwarfs or high-mass galaxies.
The lack of detected heavy elements in low- and high-ionization states suggests
that either there exists a chemical enrichment edge at d~0.7 Rh or gaseous
clumps giving rise to the observed absorption lines cannot survive at these
large distances. Considering all galaxies at d>Rh leads to a strict upper limit
for the covering fraction of heavy elements of ~3% (at a 95% confidence level)
over d=(1-9) Rh. At d<Rh, differential covering fraction between low- and
high-ionization gas is observed, suggesting that the CGM becomes progressively
more ionized from d<0.3 Rh to larger distances. Comparing CGM absorption
observations at low and high redshifts shows that at a fixed-fraction of Rh the
CGM exhibits stronger mean absorption at z=2.2 than at z~0. We discuss possible
pseudo-evolution of the CGM as a result of misrepresentation of halo radius.Comment: 25 pages, 13 figures; accepted for publication in MNRA
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