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ORCIDChristian Ikenmeyer
Person information
- affiliation: University of Warwick, Department of Mathematics, Coventry, UK
- affiliation (former): University of Liverpool, Department of Computer Science, UK
- affiliation (former): Max Planck Institute for Software Systems, Saarbrücken, Germany
- affiliation (former): Max Planck Institute for Informatics, Saarbrücken, Germany
- affiliation (former): Texas A&M University, College Station, TX, USA
- affiliation (former, PhD 2012): University of Paderborn, Institute of Mathematics, Germany
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Journal Articles
- 2022
[j13]Christian Ikenmeyer, Abhiroop Sanyal:
A note on VNP-completeness and border complexity. Inf. Process. Lett. 176: 106243 (2022)- 2020
- [j12]Nick Fischer, Christian Ikenmeyer:
The Computational Complexity of Plethysm Coefficients. Comput. Complex. 29(2): 8 (2020) - [j11]Julian Dörfler, Christian Ikenmeyer, Greta Panova:
On Geometric Complexity Theory: Multiplicity Obstructions Are Stronger Than Occurrence Obstructions. SIAM J. Appl. Algebra Geom. 4(2): 354-376 (2020) - 2019
- [j10]Luca Chiantini
, Christian Ikenmeyer, J. M. Landsberg, Giorgio Ottaviani:
The Geometry of Rank Decompositions of Matrix Multiplication I: 2 × 2 Matrices. Exp. Math. 28(3): 322-327 (2019) - [j9]Christian Ikenmeyer, Balagopal Komarath, Christoph Lenzen, Vladimir Lysikov, Andrey Mokhov, Karteek Sreenivasaiah:
On the Complexity of Hazard-free Circuits. J. ACM 66(4): 25:1-25:20 (2019) - 2018
- [j8]Christian Ikenmeyer, Stefan Mengel:
On the relative power of reduction notions in arithmetic circuit complexity. Inf. Process. Lett. 130: 7-10 (2018) - [j7]Karl Bringmann, Christian Ikenmeyer, Jeroen Zuiddam:
On Algebraic Branching Programs of Small Width. J. ACM 65(5): 32:1-32:29 (2018) - 2017
- [j6]Christian Ikenmeyer, Ketan D. Mulmuley, Michael Walter:
On vanishing of Kronecker coefficients. Comput. Complex. 26(4): 949-992 (2017) - [j5]Man Wai Cheung, Christian Ikenmeyer, Sevak Mkrtchyan:
Symmetrizing tableaux and the 5th case of the Foulkes conjecture. J. Symb. Comput. 80: 833-843 (2017) - 2016
- [j4]Fulvio Gesmundo, Jonathan D. Hauenstein, Christian Ikenmeyer, J. M. Landsberg:
Complexity of Linear Circuits and Geometry. Found. Comput. Math. 16(3): 599-635 (2016) - 2015
- [j3]Christian Ikenmeyer:
The Saxl conjecture and the dominance order. Discret. Math. 338(11): 1970-1975 (2015) - 2013
- [j2]Jonathan D. Hauenstein, Christian Ikenmeyer, J. M. Landsberg:
Equations for Lower Bounds on Border Rank. Exp. Math. 22(4): 372-383 (2013) - [j1]Peter Bürgisser, Christian Ikenmeyer:
Deciding Positivity of Littlewood-Richardson Coefficients. SIAM J. Discret. Math. 27(4): 1639-1681 (2013)
Conference and Workshop Papers
- 2024
- [c20]Pranjal Dutta, Fulvio Gesmundo, Christian Ikenmeyer, Gorav Jindal, Vladimir Lysikov:
Homogeneous Algebraic Complexity Theory and Algebraic Formulas. ITCS 2024: 43:1-43:23 - [c19]Pranjal Dutta, Fulvio Gesmundo, Christian Ikenmeyer, Gorav Jindal, Vladimir Lysikov:
Fixed-Parameter Debordering of Waring Rank. STACS 2024: 30:1-30:15 - [c18]Pranjal Dutta, Christian Ikenmeyer, Balagopal Komarath, Harshil Mittal, Saraswati Girish Nanoti, Dhara Thakkar:
On the Power of Border Width-2 ABPs over Fields of Characteristic 2. STACS 2024: 31:1-31:16 - 2023
- [c17]Christian Ikenmeyer, Balagopal Komarath, Nitin Saurabh:
Karchmer-Wigderson Games for Hazard-Free Computation. ITCS 2023: 74:1-74:25 - [c16]Christian Ikenmeyer, Igor Pak, Greta Panova:
Positivity of the symmetric group characters is as hard as the polynomial time hierarchy. SODA 2023: 3573-3586 - 2022
- [c15]Christian Ikenmeyer, Igor Pak:
What is in #P and what is not? FOCS 2022: 860-871 - [c14]Fulvio Gesmundo, Purnata Ghosal, Christian Ikenmeyer, Vladimir Lysikov:
Degree-Restricted Strength Decompositions and Algebraic Branching Programs. FSTTCS 2022: 20:1-20:15 - 2021
- [c13]Markus Bläser, Julian Dörfler, Christian Ikenmeyer:
On the Complexity of Evaluating Highest Weight Vectors. CCC 2021: 29:1-29:36 - [c12]Markus Bläser, Christian Ikenmeyer, Vladimir Lysikov, Anurag Pandey, Frank-Olaf Schreyer:
On the Orbit Closure Containment Problem and Slice Rank of Tensors. SODA 2021: 2565-2584 - 2020
- [c11]Ankit Garg, Christian Ikenmeyer, Visu Makam, Rafael Mendes de Oliveira, Michael Walter, Avi Wigderson:
Search Problems in Algebraic Complexity, GCT, and Hardness of Generators for Invariant Rings. CCC 2020: 12:1-12:17 - [c10]Markus Bläser, Christian Ikenmeyer, Meena Mahajan, Anurag Pandey, Nitin Saurabh:
Algebraic Branching Programs, Border Complexity, and Tangent Spaces. CCC 2020: 21:1-21:24 - [c9]Christian Ikenmeyer, Umangathan Kandasamy:
Implementing geometric complexity theory: on the separation of orbit closures via symmetries. STOC 2020: 713-726 - 2019
- [c8]Julian Dörfler, Christian Ikenmeyer, Greta Panova:
On Geometric Complexity Theory: Multiplicity Obstructions Are Stronger Than Occurrence Obstructions. ICALP 2019: 51:1-51:14 - 2018
- [c7]Christian Ikenmeyer, Balagopal Komarath, Christoph Lenzen, Vladimir Lysikov, Andrey Mokhov, Karteek Sreenivasaiah:
On the complexity of hazard-free circuits. STOC 2018: 878-889 - [c6]Markus Bläser, Christian Ikenmeyer, Gorav Jindal, Vladimir Lysikov:
Generalized matrix completion and algebraic natural proofs. STOC 2018: 1193-1206 - 2017
- [c5]Karl Bringmann, Christian Ikenmeyer, Jeroen Zuiddam:
On Algebraic Branching Programs of Small Width. CCC 2017: 20:1-20:31 - 2016
- [c4]Peter Bürgisser, Christian Ikenmeyer, Greta Panova:
No Occurrence Obstructions in Geometric Complexity Theory. FOCS 2016: 386-395 - [c3]Christian Ikenmeyer, Greta Panova:
Rectangular Kronecker Coefficients and Plethysms in Geometric Complexity Theory. FOCS 2016: 396-405 - 2013
- [c2]Peter Bürgisser, Christian Ikenmeyer:
Explicit lower bounds via geometric complexity theory. STOC 2013: 141-150 - 2011
- [c1]Peter Bürgisser, Christian Ikenmeyer:
Geometric complexity theory and tensor rank. STOC 2011: 509-518
Informal and Other Publications
- 2024
- [i40]Pranjal Dutta, Fulvio Gesmundo, Christian Ikenmeyer, Gorav Jindal, Vladimir Lysikov:
Fixed-parameter debordering of Waring rank. CoRR abs/2401.07631 (2024) - 2023
- [i39]Christian Ikenmeyer, Greta Panova:
All Kronecker coefficients are reduced Kronecker coefficients. CoRR abs/2305.03003 (2023) - [i38]Pranjal Dutta, Fulvio Gesmundo, Christian Ikenmeyer, Gorav Jindal, Vladimir Lysikov:
Homogeneous Algebraic Complexity Theory and Algebraic Formulas. CoRR abs/2311.17019 (2023) - 2022
- [i37]Christian Ikenmeyer, Igor Pak:
What is in #P and what is not? CoRR abs/2204.13149 (2022) - [i36]Purnata Ghosal, Fulvio Gesmundo, Christian Ikenmeyer, Vladimir Lysikov:
Degree-restricted strength decompositions and algebraic branching programs. CoRR abs/2205.02149 (2022) - [i35]Christian Ikenmeyer, Igor Pak, Greta Panova:
Positivity of the symmetric group characters is as hard as the polynomial time hierarchy. CoRR abs/2207.05423 (2022) - [i34]Pranjal Dutta, Fulvio Gesmundo, Christian Ikenmeyer, Gorav Jindal, Vladimir Lysikov:
Border complexity via elementary symmetric polynomials. CoRR abs/2211.07055 (2022) - [i33]Pranjal Dutta, Fulvio Gesmundo, Christian Ikenmeyer, Gorav Jindal, Vladimir Lysikov:
Border complexity via elementary symmetric polynomials. Electron. Colloquium Comput. Complex. TR22 (2022) - 2021
- [i32]Christian Ikenmeyer, Abhiroop Sanyal:
A note on VNP-completeness and border complexity. CoRR abs/2102.07173 (2021) - [i31]Lennart J. Haas, Christian Ikenmeyer:
Young Flattenings in the Schur module basis. CoRR abs/2104.02363 (2021) - [i30]Christian Ikenmeyer, Balagopal Komarath, Nitin Saurabh:
Karchmer-Wigderson Games for Hazard-free Computation. CoRR abs/2107.05128 (2021) - [i29]Christian Ikenmeyer, Balagopal Komarath, Nitin Saurabh:
Karchmer-Wigderson Games for Hazard-free Computation. Electron. Colloquium Comput. Complex. TR21 (2021) - 2020
- [i28]Nick Fischer, Christian Ikenmeyer:
The Computational Complexity of Plethysm Coefficients. CoRR abs/2002.00788 (2020) - [i27]Markus Bläser, Julian Dörfler, Christian Ikenmeyer:
On the complexity of evaluating highest weight vectors. CoRR abs/2002.11594 (2020) - [i26]Markus Bläser, Christian Ikenmeyer, Meena Mahajan, Anurag Pandey, Nitin Saurabh:
Algebraic Branching Programs, Border Complexity, and Tangent Spaces. CoRR abs/2003.04834 (2020) - [i25]Markus Bläser, Christian Ikenmeyer, Meena Mahajan, Anurag Pandey, Nitin Saurabh:
Algebraic Branching Programs, Border Complexity, and Tangent Spaces. Electron. Colloquium Comput. Complex. TR20 (2020) - 2019
- [i24]Julian Dörfler, Christian Ikenmeyer, Greta Panova:
On geometric complexity theory: Multiplicity obstructions are stronger than occurrence obstructions. CoRR abs/1901.04576 (2019) - [i23]Markus Bläser, Christian Ikenmeyer, Vladimir Lysikov, Anurag Pandey, Frank-Olaf Schreyer:
Variety Membership Testing, Algebraic Natural Proofs, and Geometric Complexity Theory. CoRR abs/1911.02534 (2019) - [i22]Christian Ikenmeyer, Umangathan Kandasamy:
Implementing geometric complexity theory: On the separation of orbit closures via symmetries. CoRR abs/1911.03990 (2019) - [i21]Christian Ikenmeyer, Michael Walter:
Hyperpfaffians and Geometric Complexity Theory. CoRR abs/1912.09389 (2019) - 2018
- [i20]Grey Ballard, Christian Ikenmeyer, J. M. Landsberg, Nick Ryder:
The geometry of rank decompositions of matrix multiplication II: 3×3 matrices. CoRR abs/1801.00843 (2018) - [i19]Markus Bläser, Christian Ikenmeyer, Gorav Jindal, Vladimir Lysikov:
Generalized Matrix Completion and Algebraic Natural Proofs. Electron. Colloquium Comput. Complex. TR18 (2018) - 2017
- [i18]Karl Bringmann, Christian Ikenmeyer, Jeroen Zuiddam:
On algebraic branching programs of small width. CoRR abs/1702.05328 (2017) - [i17]Christian Ikenmeyer, Vladimir Lysikov:
Strassen's 2x2 matrix multiplication algorithm: A conceptual perspective. CoRR abs/1708.08083 (2017) - [i16]Christian Ikenmeyer, Balagopal Komarath, Christoph Lenzen, Vladimir Lysikov, Andrey Mokhov, Karteek Sreenivasaiah:
On the complexity of hazard-free circuits. CoRR abs/1711.01904 (2017) - [i15]Karl Bringmann, Christian Ikenmeyer, Jeroen Zuiddam:
On algebraic branching programs of small width. Electron. Colloquium Comput. Complex. TR17 (2017) - 2016
- [i14]Peter Bürgisser, Christian Ikenmeyer, Greta Panova:
No occurrence obstructions in geometric complexity theory. CoRR abs/1604.06431 (2016) - [i13]Christian Ikenmeyer, Stefan Mengel:
On the relative power of reduction notions in arithmetic circuit complexity. CoRR abs/1609.05942 (2016) - [i12]Christian Ikenmeyer, J. M. Landsberg:
On the complexity of the permanent in various computational models. CoRR abs/1610.00159 (2016) - [i11]Luca Chiantini, Christian Ikenmeyer, J. M. Landsberg, Giorgio Ottaviani:
The geometry of rank decompositions of matrix multiplication I: 2x2 matrices. CoRR abs/1610.08364 (2016) - [i10]Fulvio Gesmundo, Christian Ikenmeyer, Greta Panova:
Geometric complexity theory and matrix powering. CoRR abs/1611.00827 (2016) - 2015
- [i9]Peter Bürgisser, Christian Ikenmeyer, Jesko Hüttenhain:
Permanent versus determinant: not via saturations of monoids of representations. CoRR abs/1501.05528 (2015) - [i8]Christian Ikenmeyer, Ketan D. Mulmuley, Michael Walter:
On vanishing of Kronecker coefficients. CoRR abs/1507.02955 (2015) - [i7]Peter Bürgisser, Christian Ikenmeyer:
Fundamental invariants of orbit closures. CoRR abs/1511.02927 (2015) - [i6]Christian Ikenmeyer, Greta Panova:
Rectangular Kronecker coefficients and plethysms in geometric complexity theory. CoRR abs/1512.03798 (2015) - 2014
- [i5]Jesko Hüttenhain, Christian Ikenmeyer:
Binary Determinantal Complexity. CoRR abs/1410.8202 (2014) - 2013
- [i4]Jonathan D. Hauenstein, Christian Ikenmeyer, J. M. Landsberg:
Computer aided methods for lower bounds on the border rank. CoRR abs/1305.0779 (2013) - [i3]Fulvio Gesmundo, Jonathan D. Hauenstein, Christian Ikenmeyer, J. M. Landsberg:
Complexity of linear circuits and geometry. CoRR abs/1310.1362 (2013) - 2012
- [i2]Peter Bürgisser, Christian Ikenmeyer:
Explicit Lower Bounds via Geometric Complexity Theory. CoRR abs/1210.8368 (2012) - 2010
- [i1]Peter Bürgisser, Christian Ikenmeyer:
Geometric Complexity Theory and Tensor Rank. CoRR abs/1011.1350 (2010)
Coauthor Index
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