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R.R.S., "Gaugings of Groupoids, Strings in Shadows, and Emergent Poisson σ-Models", arXiv 2603.20914 [hep-th]
R.R.S., "Stacky Dynamics in the Shadows of Principaloid Bundles", J. Phys.: Conf. Ser. 3152 (2025) 012038
T. Strobl and R.R.S., "Principaloid bundles", arXiv 2503.09886 [math.DG]
R.R.S., "Equivariant Cartan–Eilenberg supergerbes, the Kostelecký–Rabin defect and descent to the Rabin–Crane superorbifold", arXiv 2306.14045 [hep-th]
R.R.S., "On symmetric simplicial (super)string backgrounds, (super–)WZW defect fusion and the Chern–Simons theory", arXiv 2208.05312 [hep-th]
R.R.S., "The square root of the vacuum. I. Equivariance for the κ–symmetry superdistribution", arXiv 2002.10012 [hep-th]
R.R.S., "Defects, dualities and the geometry of strings via gerbes, II. Generalised geometries with a twist, the gauge anomaly and the gauge-symmetry defect", arXiv 1209.2334 [hep-th]
K. Gawędzki, R.R.S., and K. Waldorf, "The gauging of two-dimensional bosonic sigma models on world-sheets with defects", Rev. Math. Phys. 25 (2013) 1350010 & "Global gauge anomalies in the two-dimensional bosonic sigma model", Commun. Math. Phys. 302 (2011) 513–580
I. Runkel and R.R.S., "Gerbe-holonomy for surfaces with defect networks", Adv. Theor. Math. Phys. 13.4 (2009) 1137–1219
K. Gawędzki, R.R.S., and K. Waldorf, "Bundle gerbes for orientifold sigma models", Adv. Theor. Math. Phys. 15.3 (2011) 621–688 & "WZW orientifolds and finite group cohomology", Commun. Math. Phys. 284 (2008) 1–49
A. Recknagel and R.R.S., "Non-commutative Weitzenböck geometry, gerbe modules, and WZW branes", JHEP 0802 (2008) 089