Concept
Orbifold notation
Publications associées (13)
Kaleidoscopic groups: permutation groups constructed from dendrite homeomorphisms
Given a transitive permutation group, a fundamental object for studying its higher transitivity properties is the permutation action of its isotropy subgroup. We reverse this relationship and introduce a universal construction of infinite permutation group ...
POLISH ACAD SCIENCES INST MATHEMATICS-IMPAN2019A Theoretical Investigation of Topological Insulator Nanostructures
The topology of the electron wavefunctions in certain band insulators can give rise to novel topological phases. Materials harbouring such topological phases are termed topological insulators (TI). A gapped bulk electronic spectrum, described by a topologi ...
EPFL2016Wave propagation in periodic buckled beams
Folding of the earth's crust, wrinkling of the skin, rippling of fruits, vegetables and leaves are all examples of natural structures that can have periodic buckling. Periodic buckling is also present in engineering structures such as compressed lattices, ...
EPFL2015Neel-type skyrmion lattice with confined orientation in the polar magnetic semiconductor GaV4S8
Henrik Moodysson Rønnow, Jonathan White
Following the early prediction of the skyrmion lattice (SkL)-a periodic array of spin vortices-it has been observed recently in various magnetic crystals mostly with chiral structure. Although non-chiral but polar crystals with C-nv symmetry were identifie ...
Nature Publishing Group2015Subjective evaluation of two stereoscopic imaging systems exploiting visual attention to improve 3D quality of experience
Touradj Ebrahimi, Philippe Hanhart
Crosstalk and vergence-accommodation rivalry negatively impact the quality of experience (QoE) provided by stereoscopic displays. However, exploiting visual attention and adapting the 3D rendering process on the fly can reduce these drawbacks. In this pape ...
Spie-Int Soc Optical Engineering2014Target-space anomalies and elliptic indices in heterotic orbifolds
We present a complete string theory analysis of all mixed gauge, gravitational and target-space anomalies potentially arising in the simplest heterotic Z(N) orbifold models, with N odd and standard embedding. These anomalies turn out to be encoded in an el ...
2001