See also from Keenan Crane and company (discrete differential geometry): http://ddg.cs.columbia.edu/SGP2014/LaplaceBeltrami.pdf http://ddg.cs.columbia.edu/SGP2

See also from Keenan Crane and company (discrete differential geometry): http://ddg.cs.columbia.edu/SGP2014/LaplaceBeltrami.pdf http://ddg.cs.columbia.edu/SGP2014/LaplaceBeltrami.pdf “The Swiss Army knife of geometric operators.” I always thought that was cool since I usually think of diffusion in the context of fluid flow.