Our cohomological classification results in an atypical bulk-boundary correspondence for our topological insulators.
A. Alexandradinata, Zhijun Wang, B. Andrei Bernevig 2016, 'Topological Insulators from Group Cohomology', Physical Review Xhttp://doi.org/10.1103/PhysRevX.6.021008. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
By adopting this viewpoint, it has been possible to define cohomological obstructions to the existence of global sections.
Giovanni Carù 2017, 'On the Cohomology of Contextuality', Electronic Proceedings in Theoretical Computer Sciencehttp://arxiv.org/pdf/1701.00656v1. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)