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Blowups in BPS/CFT correspondence, and Painlev\'e VI
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abstract
We study four dimensional supersymmetric gauge theory in the presence of surface and point-like defects (blowups) and propose an identity relating partition functions at different values of $\Omega$-deformation parameters $({\varepsilon}_{1}, {\varepsilon}_{2})$. As a consequence, we obtain the formula conjectured in 2012 by O$.$Gamayun, N$.$Iorgov, and O$.$Lysovyy, relating the tau-function ${\tau}_{PVI}$ to $c=1$ conformal blocks of Liouville theory and propose its generalization for the case of Garnier-Schlesinger system. To this end we clarify the notion of the quasiclassical tau-function ${\tau}_{PVI}$ of Painlev\'e VI and its generalizations. We also make some remarks about the sphere partition functions, the boundary operator product expansion in the ${\mathcal{N}}=(4,4)$ sigma models related to four dimensional ${\mathcal{N}}=2$ theories on toric manifolds, discuss crossed instantons on conifolds, elucidate some aspects of the BPZ/KZ correspondence, and applications to quantization.
Forward citations
Cited by 5 Pith papers
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More on 5d Wilson Loops in Higher-Rank Theories and Blowup Equations
For 5d N=1 pure gauge theories, Wilson-loop blowup equations can be fixed using one-form symmetry and low-instanton data, and one-instanton free energies admit a universal v=sqrt(q1q2) expansion resembling Hilbert series.
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