Webmapping has become a popular way of distributing online mapping through the Internet. Multiple services, like the popular Google Maps or Microsoft Bing Maps, allow users to visualize cartography by using a simple Web browser and an Internet connection. However, geographic information is an expensive resource, and for this reason standardization is needed to promote its availability and reuse...

We have constructed a genetic map for a tilapia, Oreochromis niloticus, using DNA markers. The segregation of 62 microsatellite and 112 anonymous fragment length polymorphisms (AFLPs) was studied in 41 haploid embryos derived from a single female. We have identified linkages among 162 (93.1%) of these markers. 95% of the microsatellites and 92% of the AFLPs were linked in the final map. The map...

The string theory that describes two-dimensional QCD in an asymptotic 1/N expansion is investigated further. A complete geometrical description of the QCD partition function on an arbitrary manifold is given in terms of maps of a two dimensional orientable surface onto the target space. This includes correction terms that arise on surfaces with genus G 6= 1, that are described geometrically by ...

Bowen’s formula relates the Hausdorff dimension of a conformal repeller to the zero of a ‘pressure’ function. We present an elementary, self-contained proof which bypasses measure theory and the Thermodynamic Formalism to show that Bowen’s formula holds for C conformal repellers. We consider time-dependent conformal repellers obtained as invariant subsets for sequences of conformally expanding ...

Let f : Ĉ → Ĉ be a subhyperbolic rational map of degree d. We construct a set of coding maps Cod(f) = {πr : Σ → J}r of the Julia set J by geometric coding trees, where the parameter r ranges over mappings from a certain tree to the Riemann sphere. Using the universal covering space φ : S̃ → S for the corresponding orbifold, we lift the inverse of f to an iterated function system I = (gi)i=1,2,.....

Our study of the gyroid minimal surface has revealed that there are two distinct covering maps from the hyperbolic plane onto the surface that respect its intrinsic symmetries. We show that if a decoration of H is chiral, the projection of this pattern via the two covering maps gives rise to distinct structures in E. PACS. 61.50.Ah Theory of crystal structure, crystal symmetry; calculations and...

In this paper we shall study homomorphisms p: W — Y on minimal transformation groups. We shall prove, in the case that W and Y are metrizable, that W is a finite (iV-to-1) extension of Y if and only if W is an Nfold covering space of Y and pisa covering map. This result places no further restrictions on the acting group. We shall then use this characterization to investigate the question of lif...

We investigate the covering problem in RT spaces induced by the RosenbloomTsfasman metric, extending the classical covering problem in Hamming spaces. Some connections between coverings in RT spaces and coverings in Hamming spaces are derived. Several lower and upper bounds are established for the smallest cardinality of a covering code in an RT space, generalizing results by Carnielli, Chen an...

By a construction of Berstein and Edmonds every proper branched cover f between manifolds is factor covering orbit map from locally connected compact Hausdorff space called the monodromy to target manifold. For covers 2-manifolds known be We show that this does not generalize dimension 3 by constructing self-map 3-sphere for which contractible space.