This paper studies the introduction of new varieties of goods in the Chinese manufacturing sector during the period 1998-2000. I first develop a monopolistic competition model with multiproduct firms in which firms are heterogeneous in two dimensions: the fixed cost of introducing varieties into the market and the variable cost of production. Using firm-level data for the Chinese manufacturing ...

For predual categories C andD we establish isomorphisms between opfibrations representing local varieties of languages in C, local pseudovarieties of D-monoids, and finitely generated profinite D-monoids. The global sections of these opfibrations are shown to correspond to varieties of languages in C, pseudovarieties of D-monoids, and profinite equational theories of D-monoids, respectively. As...

I find new equations for Chow varieties, their secant varieties, and an additional variety that arises in the study of complexity theory by flattenings and Koszul Young flattenings. This enables a new lower bound for symmetric border rank of x1x2⋯xd when d is odd, and a new lower complexity bound for the permanent.

A short review of two chambered left ventricle is given, and this rare condition is briefly compared and contrasted with the more common condition involving the right ventricle. Three cases are described, each of which presents a new variety of subdivision of the left ventricle; in two of these the condition was first shown by angiocardiography. The first case had left heart hypoplasia with dys...

New fruit varieties are needed to satisfy consumers, and the industry is facing new challenges in order to respond to these demands. The emergence of genomic tools is releasing information on polymorphisms that can be utilized to expedite breeding processes in species that are difficult to breed, given the long periods of time required to get new varieties. The present review describes the curr...

Inbreeding coefficients and coancestry were used to investigate the genetic base in the Taiwan sugarcane breeding program. Six of the potentially most important ROC varieties in Taiwan were studied. Four ROC varieties had inbreeding coefficients. The largest inbreeding coefficient was found in ROClO (0.281), followed by ROC9 (0.156). Since ROC9 and ROClO are currently the leading cane varieties...

Tetsushi Ito (Kyoto University, Graduate School of Science, Assistant Professor) 【Outline of survey】 Shimura varieties are algebraic varieties (geometric objects defined by equations), which are generalizations of modular curves. Previously, several mathematical objects in arithmetic geometry, Galois representations, automorphic representations were studied from individual perspectives. However...

In [2], Alexeev constructed a proper moduli space of polarized toric varieties. However, in addition to the main component containing the toric varieties, there were additional irreducible components which were tricky to eliminate in a canonical way. Later, Olsson [1] showed how adding a log structure to the toric varieties under consideration effectively restricted the problem enough to single...

We construct endomotives associated to toric varieties, in terms of the decomposition of a toric variety into torus orbits and the action of a semigroup of toric morphisms. We show that the endomotives can be endowed with time evolutions and we discuss the resulting quantum statistical mechanical systems. We show that in particular, one can construct a time evolution related to the logarithmic ...

1. Varieties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2. Characters and 1-Parameter Subgroups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3. Toric Varieties . . . . . . . . . . . . . . . . . . . . . . . . . ....