Christian Ikenmeyer
firstname dot lastname at warwick.ac.uk Office: CS2.07

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Workshops

• With Jakob Moosbauer I organized a workshop on Algebraic Complexity, Geometry, and Representations, 2025-March-17 to 21.
• With Pranjal Dutta and Vladimir Lysikov I organized the Algebraic Complexity Theory Workshop at ICALP 2023.
• I was the main organizer of the Seventh Workshop on Algebraic Complexity Theory (WACT), 2023.
• I was a co-organizer of the 2021 lecture series on geometric complexity theory.
• With Mateusz Michałek (formerly MPI-MiS Leipzig) I organized the MPI-INF and MPI-MiS joint workshop on Theoretical Computer Science and Algebraic Geometry that was held in Saarbrücken from January 14 - 18, 2019.

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Lecture notes

• Lecture notes on Geometric Complexity Theory, with Markus Bläser

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Teaching Geometric Complexity Theory in Saarbrücken

• Summer semester 2018: A first introduction to geometric complexity theory
• Winter semester 2017/2018: Geometric complexity theory 2 (with Markus Bläser)
• Summer semester 2017: Introduction to geometric complexity theory (with Markus Bläser)

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Research Interests

• Computational complexity theory (algebraic, geometric, Boolean)
• Tensor rank
• Computational representation theory
• Algebraic combinatorics
• Algebraic geometry

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CV and Publications

• CV and publication list
• PhD thesis (2012)
• Diplomarbeit (2008)

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Software

• Paper 'Young Flattenings in the Schur module basis' (with Lennart Haas) with source code: [ arXiv ]
• Source code for the paper 'Equations for GL-invariant families of polynomials': [ GL-paper ]
• A Java implementation of algorithms for computing Littlewood-Richardson coefficients: [ source ]
  The corresponding papers are 'Deciding Positivity of Littlewood-Richardson coefficients' (with Peter Bürgisser) and 'Small Littlewood-Richardson coefficients'.