~/talk

Solving $1$-Laplacians of Convex Simplicial Complexes

Talkat Fast Algorithms via Spectral Methods 2014 · 2014-12-01..12-05
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slides:none on file

Proposal: fast solver for 1‑Laplacians on certain 3D simplicial complexes that reduce to zero-Laplacian problems via dualization. Method: use Helmholtz decomposition to split demands into potential + circulation, find an initial face flux by exploiting collapsibility of convex triangulations (Whitehead), then optimize circulations with a KOSZ‑style iterative energy minimization and call existing nearly‑linear graph Laplacian solvers. Works under assumptions: convex triangulated 3‑ball, β2=0 and collapsible subcomplexes; practical extension beyond those restrictions remains open.

AI-written summary · about

  1. 0:00Introduction to laplacians
  2. 1:33Graph laplacian solvers
  3. 3:24Higher dimensional topology
  4. 5:11Regression and simplices
  5. 7:43Helmholtz-Hodge motivation
  6. 10:23The zero laplacian
  7. 13:52Terminology and chains
  8. 17:07Flow decomposition
  9. 22:22The Kosc-style algorithm
  10. 25:09Decomposition and projection
  11. 28:10Solving via minimization
  12. 34:13Dualizing equations
  13. 38:07Collapsibility and complexes
  14. 44:57Spheres and topologies
  15. 47:20Social networks and closure
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