Joseph (JM) Landsberg, professor of mathematics

Office: Blocker 601H
Office hours: Tues. and Thurs. 10-11am
E-mail: jml@math.tamu.edu
TAMU math dept homepage
Supported by NSF grant DMS-1405368


Teaching Fall 2016: Geometry and complexity theory Math 662
Meeting: MWF 10:20 - 11:10 Bloc 624


Fall  2014 I served as Chancellor's Professor at the Simons Institute for the Theory of Computing, UC Berkeley,
and co-organized (with P. Burgisser, K. Mulmuley and B. Sturmfels) of the semester long program
Algorithms and Complexity in Algebraic Geometry  During the semester I gave a course on Geometry and Complexity Theory, and have notes for the course.

Education

Research: Geometric questions originating in theoretical computer science, Algebraic geometry, differential geometry, Exterior differential systems, Homogeneous varieties,  (Click here to read more.)

 


I organize and co-organize:
Geometry seminar, meeting  Fridays 4-5pm Blocker 628.
Working seminar for post-docs and graduate students meeting Tuesdays, Blocker 506A,
9:30-10:30am
 


Everyone is welcome to the seminars, graduate students
are particularly encouraged to attend.
TAMU seminar calendar
My CV (last updated 10/16)

My  travel plans



I am on the editorial board of Foundation of Computational MathematicsDifferential Geometry and its Applications, and  Linear Algebra and its Applications.

**DGA special issue on geometry and complexity theory**
The journal Differential Geometry and its Applications http://ees.elsevier.com/dga/ will be having a special thematic issue dedicated to geometry and complexity theory. I  encourage you to  submit an article for consideration.
I am trying to put together a high quality issue that will  increase the visibility of this emerging area. Moreover, having an issue dedicated to the geometry and complexity  will increase the visibility of each individual article as well, as previously, articles in the area have been appearing in a wide range of publications. The deadline for submissions is Dec. 31, 2016.
If you submit through the DGA webpage, be sure to include in your cover letter that it is for the thematic issue. If you have any questions about the thematic issue, please do not hesitate to contact me at jml@math.tamu.edu.
PAPERS/PREPRINTS in past 5 years
Survey articles
         Books:

          Geometry and complexity theory: to be published spring 2017 by Cambridge University press.           Click here to see a draft copy

            Tensors: Geometry and Applications.
         AMS GSM 128. Click here to see table of contents and preface, and to order.
          Click here for corrections and additions
  Cartan For Beginners: Differential geometry via moving frames and exterior differential systems,
Second Edition
(with T. Ivey) AMS GSM 175
http://bookstore.ams.org/gsm-175


Slides of recent talks:
Complexity theory and geometry (Berlin Mathematical School colloquium 2/15)
Perm v. det: an exponential lower bound assuming symmetry (Innovations in Theoretical Computer Science 1/16)
math reviews of all published papers


PhD students:
Current students:  Kashif Bari, Fulvio Gesmundo,  and Yao Wang
Graduated students:

Cameron Farnsworth, August 2016, THE POLYNOMIAL WARING PROBLEM AND THE DETERMINANT

Yonghui Guan, August 2016, EQUATIONS FOR CHOW VARIETIES, THEIR SECANT VARIETIES AND
OTHER VARIETIES ARISING IN COMPLEXITY THEORY


Curtis Porter, August 2016 THE LOCAL EQUIVALENCE PROBLEM FOR 7-DIMENSIONAL, 2-NONDEGENERATE CR
MANIFOLDS WHOSE CUBIC FORM IS OF CONFORMAL UNITARY TYPE


Yang Qi, PhD August 2013 Geometry of Feasible Spaces of Tensors
determined defining equations for the third secant variety of a triple Segre product and closedness of tensor network states

Ke Ye,   PhD August  2012, IMMANANTS, TENSOR NETWORK STATES AND THE GEOMETRIC
COMPLEXITY THEORY PROGRAM
determined symmetry groups of immanents, and closedness of tensor network states

Ming Yang,   PhD Sept. 2012, 
On partial and generic uniqueness of block term tensor decompositions in signal processing, solving  questions originating in signal processing.
         Luke Oeding,  PhD May 2009,     Defining equations of the varietyof principal minors solved a conjecture of Holtz and Sturmfels.

           Frederic Holweck, PhD fall  04,  Dual varieties, simple singularities and simple Lie algebras
                   Here is a summary of his results in English

           E. Allaud, PhD spring 03, 
Nongenericity of variations of Hodge structure for hypersurfaces of high degree,
          
 
  New to the area? Here are some Brazos  Valley links


  Now available:

Sungbook: A Collection of Korean Short Stories 

by Suil Kang (Author)


available at  Amazon (both paperback and kindle):
   
Various links
tamuwebmail