We describe mirror manifolds in dimensions different from the familiar case of complex threefolds. We emphasize the simplifying features of dimension three and supply more robust methods that do not rely on such special characteristics and hence naturally generalize to other dimensions. The moduli spaces for Calabi–Yau d-folds are somewhat different from the “special Kähler manifolds” which had...

Spatial data infrastructures (SDIs) are becoming more mature worldwide. However, despite this growing maturity, longitudinal research on the governance of SDIs is rare. The current research examines the governance history of two SDIs in The Netherlands and Flanders (Belgium). Both represent decades-long undertakings to create a large-scale base map. During these processes, SDI governance change...

Assimilative learning is understood as integrating new information into existing knowledge or cognitive structures without restructuring the current schema. If new information causes inconsistencies, cognitive efforts are necessary to reorganize or to accommodate the old knowledge. Thus, assimilative learning is more efficient and economic. Nonetheless a stable and most notably a correct memory...

The space of diffeomorphisms of the circle modulo boundary values of conformal maps of the disk. The Sobolev 3/2 norm on the tangent space space at id of the space of diffeomorphisms of the circle modulo boundary values of conformal maps of the disk induces the only Kähler left invariant metric defined up to a constant on the space of diffeomorphisms of the circle modulo boundary values of conf...

We define the thin fundamental categorical group P2(M, ∗) of a based smooth manifold (M, ∗) as the categorical group whose objects are rank-1 homotopy classes of based loops on M , and whose morphisms are rank2 homotopy classes of homotopies between based loops on M . Here two maps are rank-n homotopic, when the rank of the differential of the homotopy between them equals n. Let C(G) be a Lie c...

This paper addresses the de nition of facilitation techniques to the analysis and diagnosis of organisational problems Its foundations the cognitive mapping techniques and a speci c organisational develop ment approach are introduced Then the contributions of technology to the use and augmentation of these methods are discussed and relevant work is referred Afterwards FADO a facilitation tool s...