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meetings take place on:
Tuesday 10:00-11:30, room 403
in the summer semester of 2019/2020:
- 28.01.2020 (room 408)
- 21.01.2020 (room 408)
- 14.01.2020
- 07.01.2020
- 17.12.2019
- 10.12.2019
- 03.12.2019
- 26.11.2019
- 19.11.2019
- 12.11.2019
- 05.11.2019
- 29.10.2019
- 22.10.2019
- 15.10.2019
in the academic year 2018/2019:
- 24.09.2019
- 17.09.2019
- 10.09.2019
- 03.09.2019
- 27.08.2019
- 20.08.2019
- 13.08.2019
- 06.08.2019
- 30.07.2019
- 23.07.2019
- 16.07.2019
- 10.04.2019 (in the room 321)
- 27.03.2019
- 20.03.2019 (in the room 408)
- 13.03.2019
- 06.03.2019
- 27.02.2019
- 20.02.2019
- 13.02.2019
- 06.02.2019
- 30.01.2019
- 23.01.2019
- 16.01.2019
- 09.01.2019
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Research problems we try to address:
- Find equations of secant varieties that do not vanish on cactus varieties.
- For a fixed tensor
 find criteria for  to have border rank equal to  .
- High rank loci. For
 let  be the closure of tensors in  which have rank equal to  . Is there an equality between  and  for  , where  denotes the join of  and  ? (answer is no - recently solved by E. Ballico, A. Bernardi, E. Ventura
- For
 , where  is generic from  we want to find decomposition  for  . We would like to find an algorithm wich computes such a decomposition.
- For
 where  are simple tensors with norm  and  is a random error with norm  . Assuming  we want to find the funcition  such that  is the best rank 2 approximation and the norms  are bounded from above by some constant.
We are open to discuss any issues related to secant varieties, cactus varieties, tensor rank, Waring rank, and their border/cactus analogues, identifiability, apolarity, Hilbert schemes of points etc.
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