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Yang Qi's homepage
  • Home
  • Research
  • Talks
  • Services
  • Teaching
    • Math 131
  • Travels
  • More
    • Home
    • Research
    • Talks
    • Services
    • Teaching
      • Math 131
    • Travels
  • Tropical linear regression and low-rank approximation --- a first step in tropical data analysis, TATERS, Boise State University, December 3, 2021

  • Tropical linear regression and low-rank approximation --- a first step in tropical data analysis, PGMO Days, December, 2021

  • On best approximations of high-dimensional semialgebraic data sets, HCM Symposium, Hausdorff Center for Mathematics, August, 2021

  • Inner and outer approximations of tropical polytopes and their applications in tropical tensors, Workshop III: Mathematical Foundations and Algorithms for Tensor Computations, part of the long program Tensor Methods and Emerging Applications to the Physical and Data Sciences, Institute for Pure and Applied Mathematics, University of California, Los Angeles, May, 2021

  • Geometric techniques for tensor computations, Séminaire du CMAP, École polytechnique, March, 2021

  • On the rank preserving property of linear sections and its applications in tensors, Seminario di Geometria Algebrica e Tensori, Firenze, Italy, October 2019

  • Path-connectedness of tensor ranks, 27th European Signal Processing Conference, A Coruña, Spain, September 2019

  • On different notions of ranks, International Congress on Industrial and Applied Mathematics, Valencia, Spain, July 2019

  • Geometry of best k-layer approximations, SIAM Conference on Applied Algebraic Geometry, Bern, Switzerland, July 2019

  • On different notions of ranks, Journée GDR Nouvelles méthodes tensorielles et applications, Paris, France, June 2019

  • On the rank preserving property of a linear section and its applications in tensors, Geometry Seminar, College Station, TX, December 2018

  • On the rank preserving properties of linear sections of varieties and their applications in tensors, 2018 SIAM Annual Meeting, Portland, OR, July 2018 slides video

  • On the rank preserving property of special linear sections and its applications in tensors, Spring 2018 Southeastern Sectional Meeting of the AMS, Nashville, TN, April 2018 slides

  • Complex best r-term approximations almost always exist in finite dimension, Gautschi Conference on Scientific Computing and Approximation, Purdue University, West Lafayette, IN, March 2018, slides

  • Some geometric and topological problems arising from tensor computations, Seminar on Nonlinear Algebra, Max Planck Institute for Mathematics in the Sciences, Leipzig, Germany, March 2018 slides

  • Secant varieties and tensor ranks, 2018 Joint Mathematics Meetings, San Diego, CA, January 2018 slides

  • On linear sections of secant varieties and its applications in tensors, 2017 Korea - China International Conference on Matrix Theory with Applications, Suwon, Korea, December 2017 slides

  • Geometry of tensor approximations and tensor decompositions, Seminar on Applied Algebra and Geometry, Massachusetts Institute of Technology, Cambridge, MA, December 2017 slides

  • On approximations and decompositions of a general tensor, Symbolic Computation Seminar, North Carolina State University, Raleigh, NC, December 2017 slides

  • Identifiability of an X-rank decomposition of polynomial maps, SIAM Conference on Applied Algebraic Geometry, Atlanta, GA, July 2017 slides

  • Nonnegative tensor rank, Householder Symposium XX on Numerical Linear Algebra, Blacksburg, VA, June 2017 slides

  • Nonnegative tensor decompositions and approximations, Applied Algebra Seminar, University of Wisconsin, Madison, WI, April 2017 slides

  • Semialgebraic geometry of nonnegative tensor rank, SIAM Conference on Computational Science and Engineering, Atlanta, GA, March 2017 slides

  • Topology of the set of tensors of a fixed rank, The 20th Conference of the International Linear Algebra Society, Leuven, Belgium, July 2016 slides

  • Uniqueness of nonnegative CP decompositions of best low nonnegative rank approximations, Workshop on Tensor Decompositions and Applications, Katholieke Universiteit Leuven, Leuven, Belgium, January 2016 slides

  • Sufficient conditions to ensure uniqueness of best rank-one approximations, SIAM Conference on Applied Algebraic Geometry, Daejeon, Korea, August 2015 slides

  • Secant varieties and tensor decompositions, Seminaire de l'algebre et geometries, Institut Fourier, Grenoble, France, December 2013 slides

  • On the equations of the third secant variety of an n-fold Segre product, 2013 Joint Mathematics Meetings, San Diego, CA, January 2013 slides

  • Equations for the third secant variety of the Segre product of projective spaces, Algebraic Geometry Seminar, Rice University, Houston, TX, November 2012




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