Semen Slobodianiuk, PhD student
Semen Slobodianiuk was employed on 1 January 2026 at the department’s section for Algebra and Geometry as a PhD student.
Semen will be working with the Copenhagen Centre for Geometry and Topology, supervised by Ryomei Iwasa.
“I am interested in algebraic geometry, homotopy theory and $p$-adic geometry. I am a big fan of non-$\mathbb{A}^1$-invariant cohomology theories; this is why my PhD project is on non-$\mathbb{A}^1$-invariant motivic homotopy theory in the sense of Annala-Iwasa-Hoyois. I am also aware of other approaches to this topic, for example, the one described by Bhatt in his prismatic F-gauges note,” Semen explains.
“I am interested in the approach to $p$-adic geometry through the theory of analytic stacks developed by Clausen-Scholze. I enjoy the $p$-adic incarnation of the de Rham stack, an object introduced by Juan Esteban Rodríguez Camargo, who was the supervisor of my master's thesis. More specifically, in the thesis, I constructed a characteristic variety of "analytic" $D$-modules on a smooth rigid space; this in particular applies to $D$-modules considered by Ardakov, Bode and Wadsley."
You can find Semen in office 04.0.07