Crowley, DiarmuidGrant, Mark2018-03-292018-03-292017-07Crowley, D & Grant, M 2017, 'The Poincaré-Hopf Theorem for line fields revisited', Journal of Geometry and Physics, vol. 117, pp. 187-196. https://doi.org/10.1016/j.geomphys.2017.03.0110393-0440ArXiv: http://arxiv.org/abs/1612.04073v1http://hdl.handle.net/2164/1026510198573engPoincaré–Hopf theoremLine fieldsTopological defectsCondensed matter physicsQA MathematicsQAJournal article10.1016/j.geomphys.2017.03.011https://arxiv.org/abs/1612.04073117