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The exact solution of the 2D classical and 1D quantum Ising models via the Kac-Ward method

Onsager proposed a closed-form expression for the free energy of the 2D classical Ising model in 1944. In 1952, Kac and Ward introduced an alternative elegant method of combinatorial nature. Kager, Li...

Schauder estimates for elliptic equations degenerating on lower dimensional manifolds

We discuss some regularity results for a class of elliptic equations with coefficients that degenerate or explode on a lower dimensional manifold. The prototype is given by \( -div(|y|^aA(x, y)\nabla ...

Virtual intersection theory on the space of lines in the plane

The moduli space of stable n-pointed rational curves is a fundamental object in algebraic geometry. Many aspects of the space, such as its intersection theory, have been completely understood. The two...

From classical fractal sets to self similar C*-algebras: A constructive approach to fractals, commutative and not commutative

:We review various notions of self-similar fractal compact sets such as Hutchinson’s, Kigami’s or Kamiyama’s, and see which way most of them can be reached through an inceasing sequence of approximati...

(Non-)formality of Swiss-Cheese operads

Operads are algebraic structures capturing multi-ary operations. The little disks operads, encoding operations on iterated loop spaces, are fundamental examples. Voronov introduced Swiss-Cheese operad...

The Surface Diffusion Flow: long time behavior and stability

In a recent paper, we study the long--time behavior and the stability of the surface diffusion flow of smooth hypersurfaces in the flat torus \(\mathbb T^n\). According to this flow, smooth hypersurfa...

Embracing AI and Formalization: Experimenting with Tomorrow's Mathematical Tools

You've heard the buzz: AI and formalization will revolutionize mathematics. Computers will soon surpass humans in solving olympiad-style problems. Humans will transition from proving research-level t...

Sulla congettura del cono relativa per famiglie di varietà olomorfe simplettiche.

Nel seminario presenterò un lavoro in collaborazione con A. Höring e Z. Xie nel quale studiamo la congettura del cono relativa per famiglie di varietà K-triviali con irregolarità nulla. Dopo aver intr...

Numbers & Curves: an introduction to Diophantine geometry.

The study of Diophantine equations is one of the oldest problems in mathematics, with many questions that remain open to this day. However, at the start of the 20th century, mathematicians began to re...
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