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We find explicit equations of a new pair of fake projective planes, labeled by $(C18,p=3,\{2I\})$ in the Cartwright-Steger classification. Our method involves starting with known equations of a commensurable fake projective plane…

Algebraic Geometry · Mathematics 2025-12-04 Lev Borisov , Bojue Wang

We discuss solutions of several questions concerning the geometry of conformal planes.

Differential Geometry · Mathematics 2022-11-29 Alexander Lytchak

In this note I give a positive solution to Bullett's conjecture (posed in [1]) regarding a geometric presentation of the universal mod $p$ oriented ring spectrum.

Algebraic Topology · Mathematics 2024-04-30 Kiran Luecke

We give an explicit description of the spectrum of the Hodge--Laplace operator on $p$-forms of an arbitrary lens space for any $p$. We write the two generating functions encoding the $p$-spectrum as rational functions. As a consequence, we…

Differential Geometry · Mathematics 2018-11-19 Emilio A. Lauret

This is an account of the algebraic geometry of Witt vectors and arithmetic jet spaces. The usual, "p-typical" Witt vectors of p-adic schemes of finite type are already reasonably well understood. The main point here is to generalize this…

Algebraic Geometry · Mathematics 2015-12-15 James Borger

It is shown that for every measure $m$ on projections in a $W^*$-algebra of type $I_2$, there exists a Hilbert-valued orthogonal vector measure $\mu$ such that $\|\mu(p)\|^2= m(p)$ for every projection $p$. With regard to J. Hamhalter's…

Operator Algebras · Mathematics 2011-12-26 A. N. Sherstnev

Direct estimates between linear or nonlinear Kolmogorov widths and entropy numbers are presented. These estimates are derived using the recently introduced Lipschitz widths. Applications for m-term approximation are obtained.

Functional Analysis · Mathematics 2022-03-02 Guergana Petrova , Przemyslaw Wojtaszczyk

In this note, we study base point freeness up to taking p-power, which we will call p-power freeness. We first establish some criteria for p-power freeness as analogues of criteria for semi-ampleness. We then apply these results to…

Algebraic Geometry · Mathematics 2020-03-13 Hiromu Tanaka

Generalising the two-dimensional case, we provide estimates for the mean-values of the lengths of the edges of an integral box with given volume and minimal surface.

Number Theory · Mathematics 2026-02-03 Jonathan Rotgé , Gérald Tenenbaum

A survey of real differential geometry and loop theory is given in order to introduce the construction of an analytic loop associated to p-adic differential manifold.

Differential Geometry · Mathematics 2017-05-18 Raffaello Caserta

In this short note, we compute the conformal stereographic projection on the standard metric of a sphere quotient. The result is a Majumdar-Papapetrou metric, which might be useful.

Differential Geometry · Mathematics 2023-04-18 Gautier Dietrich

The projective span of a smooth manifold is defined to be the maximal number of linearly independent tangent line fields. We initiate a study of projective span, highlighting its relationship with the span, a more classical invariant. We…

Algebraic Topology · Mathematics 2023-11-27 Mark Grant , Baylee Schutte

Suppose an interval is put on a horizontal line with random roughness. With probability one it is supported at two points, one from the left, and another from the right from its center. We compute probability distribution of support points…

Probability · Mathematics 2013-05-20 Dmitry Treschev

We investigate the enumerative geometry of point configurations in projective space. We define "projective configuration counts": these enumerate configurations of points in projective space such that certain specified subsets are in fixed…

Algebraic Geometry · Mathematics 2026-02-09 Alex Fink , Navid Nabijou , Rob Silversmith

In this short note we announce explicit equations of a fake projective plane in its bicanonical embedding in $\mathbb C\mathbb P^9$.

Algebraic Geometry · Mathematics 2017-10-13 Lev Borisov , JongHae Keum

In this paper we study $L_p$-norm spherical copulas for arbitrary $p \in [1,\infty]$ and arbitrary dimensions. The study is motivated by a conjecture that these distributions lead to a sharp bound for the value of a certain generalized mean…

Statistics Theory · Mathematics 2022-06-22 Carole Bernard , Alfred Müller , Marco Oesting

We determine all arithmetic Y-Frieze patterns of width $3$ and $4$. As a consequence, for $n=3,4$, we verify the surjectivity of a map $p_n$ which corresponds arithmetic Y-Frieze patterns of width $n$ to Coxeter's Frieze patterns.

Combinatorics · Mathematics 2025-08-22 Katsuhiko Matsuzaki , Taiki Resnick

We compute the Gromov width of homogeneous Kaehler manifolds with second Betti number equal to one. Our result is based on the recent preprint [4] and on the upper bound of the Gromov width for such manifolds obtained in [6].

Symplectic Geometry · Mathematics 2017-12-20 Andrea Loi , Fabio Zuddas

In this paper we provide some exact formulas for the projective dimension and the regularity of edge ideals associated to three special types of vertex-weighted oriented $m$-partite graphs. These formulas are functions of the weight and…

Commutative Algebra · Mathematics 2019-06-04 Guangjun Zhu , Hong Wang , Li Xu , Jiaqi Zhang

The Bergman projection $P_\alpha$, induced by a standard radial weight, is bounded and onto from $L^\infty$ to the Bloch space $\mathcal{B}$. However, $P_\alpha: L^\infty\to \mathcal{B}$ is not a projection. This fact can be emended via the…

Complex Variables · Mathematics 2022-07-05 José Ángel Peláez , Jouni Rättyä
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