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 SIGMA 20 (2024), 063, 8 pages       arXiv:2402.17174     
https://doi.org/10.3842/SIGMA.2024.063 
Contribution to the Special Issue on Basic Hypergeometric Series Associated with Root Systems and Applications in honor of Stephen C. Milne 
On Some Special Cases of Gaiotto's Positivity Conjecture
Pavel Etingof
 Department of Mathematics, MIT, Cambridge, MA 02139, USA
 
 
Received February 29, 2024, in final form July 11, 2024; Published online July 13, 2024
 Abstract 
We prove a conjecture of D. Gaiotto on positivity of inner products arising in studying Landau-Ginzburg boundary conditions in the 1-dimensional case, and in special cases in higher dimensions, for 3d free hypermultiplets.
 Key words: gauge theory; total positivity; positive definite function; Bochner's theorem. 
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References 
- Gaiotto D., Sphere quantization of Higgs and Coulomb branches and analytic symplectic duality, arXiv:2307.12396.
 
- Gantmacher F.R., The theory of matrices, Vol. 2, Chelsea Publishing Co., New York, 1959.
 
- Gröchenig K., Schoenberg's theory of totally positive functions and the Riemann zeta function, in Sampling, Approximation, and Signal Analysis. Harmonic Analysis in the Spirit of J. Rowland Higgins, Appl. Numer. Harmon. Anal., Birkhäuser, Cham, 2023, 193-210, arXiv:2007.12889.
 
- Karlin S., Total positivity, absorption probabilities and applications, Trans. Amer. Math. Soc. 111 (1964), 33-107.
 
- Karlin S., Total positivity. Vol. I, Stanford University Press, Stanford, CA, 1968.
 
- Rid M., Simon B., Methods of modern mathematical physics, Vol. II, Academic Press, New York, 1975.
 
- Schoenberg I.J., On Pólya frequency functions. I. The totally positive functions and their Laplace transforms, J. Anal. Math. 1 (1951), 331-374.
 
 
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