École Normale Supérieure de Lyon

Critical point representation of the mutual information in the sparse stochastic block model

We consider the problem of recovering the community structure in the stochastic block model. We aim to describe the mutual information between the observed network and the actual community structure as the number of nodes diverges while the average degree of a given node remains...

Tricking Turing: How to Build a Geometric Checkerboard on Living Tissue

The snake’s head fritillary (Fritillaria meleagris) displays one of the rarest pigmentation motifs in the plant kingdom: a high-contrast checkerboard of alternating purple and white domains on its flowers. Standard reaction–diffusion theory does not generically produce this patte...

Tricking Turing: How to Build a Geometric Checkerboard on Living Tissue

The snake’s head fritillary (Fritillaria meleagris) displays one of the rarest pigmentation motifs in the plant kingdom: a high-contrast checkerboard of alternating purple and white domains on its flowers. Standard reaction–diffusion theory does not generically produce this patte...

The spinorial ball (II): A manipulable qubit at human scale

The spinorial ball is an interactive electronic device that we recently introduced to discuss the origin of spin-1/2 from the representation of the rotation group, without the framework quantum mechanics. Nevertheless, it can also be viewed as a macroscopic visualization of a qua...

PRISM with a Pinch of Salt: Simple, Efficient, and Strongly Unforgeable Signatures from Isogenies

Abstract The problem of computing an isogeny of large prime degree from a supersingular elliptic curve of unknown endomorphism ring is assumed to be hard both for classical as well as quantum computers. In this work, we first build a two-round identification protocol whose securi...

Spinoza et le langage comme pratique

Spinoza develops an implicit theory of language as social practice rather than as a system of signs. Through a reading of the Theological-Political Treatise and the Ethics , on can show that meanings arise from embodied habits ( consuetudo ), vary according to social functions, a...

Rare events algorithm study of extreme double jet summers and their connection with heatwaves over the Northern Hemisphere

Abstract Several large scale circulation patterns have been identified in relation to extreme Northern Hemisphere summer heatwaves. Three main ones are a double jet over Eurasia, a positive phase of the summer northern annular mode, and a quasi-wave-3 geopotential height anomaly....

Two‐Block Paths in Oriented Graphs of Large Semidegree

ABSTRACT We study the existence of oriented paths with two blocks in oriented graphs under semidegree conditions. A block of an oriented path is a maximal directed subpath. Given positive integers and with , we establish a semidegree function that guarantees the containment of ev...

Statistical discrimination of Guatemalan jadeitite sources using LA-ICP-MS trace element and petrological data

While tracing the geological provenance of Maya jadeitite-jade is key to understanding Mesoamerican exchange and extraction, distinguishing between the north (NMM) and south (SMM) Motagua sources presents significant challenges. This difficulty is due to shared mineralogical trai...

A Frank-Wolfe-based primal heuristic for quadratic mixed-integer optimization

Abstract We propose a primal heuristic for quadratic mixed-integer problems. Our method extends the Boscia framework – originally a mixed-integer convex solver leveraging a Frank-Wolfe-based branch-and-bound approach – to address nonconvex quadratic objective functions and constr...

Molecular basis of nick ligation in the nucleosome by DNA Ligase IIIα

Eukaryotic genomic DNA is packaged into chromatin through a fundamental repeating unit known as the nucleosome core particle. Within this chromatin context, genomic DNA is constantly exposed to endogenous and exogenous stress that result in the formation of DNA damage, which must...

A strong-coupling theory for polarizable symmetrically charged walls with counterions only

A pair of parallel polarizable planar walls at a distance d is considered. The walls are symmetrically charged with a uniform surface charge density, neutralized by mobile point counterions moving between them. The case of repulsive particle images is studied in the strong-coupli...

‘My Soul of Combined Saltpeter’. The Penal Colony Journal of Jean Claude Romand

Having fought in the Lyon uprising of November 1831, tailor and republican activist Jean Claude Romand (1798–1874) was sentenced to the Toulon penal colony from 1833 to 1838. There, the man who would later claim credit for coining the Canut motto – ‘Live working or die fighting’...

Quantum Entropic Relationalism (QER): Contemporary Debates and Theoretical Frontiers

Entropy has evolved from a secondary thermodynamic property (Clausius, 1865) to a potentially fundamental organizing structure of physical reality, particularly through its gravitational manifestation in the Bekenstein–Hawking formula. This article systematically reviews four the...

Early development of anoxia prior to the main euxinic phase of the Jenkyns Event on the margin of the Western Tethys (Sachrang Basin, Eastern Alps)

ABSTRACT Although the global expansion of oxygen‐depleted marine environments during the Early Toarcian Jenkyns Event (or Toarcian Oceanic Anoxic Event) is primarily inferred from successions in the NW European epicontinental basins, the timing of the expansion of anoxia in Tethy...

Tricking Turing: How to Build a Geometric Checkerboard on Living Tissue

The snake’s head fritillary (Fritillaria meleagris) displays one of the rarest pigmentation motifs in the plant kingdom: a high-contrast checkerboard of alternating purple and white domains on its tepals. Standard reaction–diffusion theory does not generically produce this patter...

Tail Modulo Async-Await

This article extends tail-call optimisation by applying it to asynchronous calls. We first introduce TMA, a novel code transformation for asynchronous tail recursive functions that prevents the creation of unnecessary tasks. We then show how to combine TMA with the existing TMC o...

First-Class Constrained Types: Elaboration, Type Inference, Approximation, and a Characterization of Termination

We study a first-class treatment of constrained types, which were previously confined mostly to ML-style polymorphism. We define System FCCT, an extension of System F with polymorphic subtyping and constraint abstraction in types. A value of type c ⇒ τ can be used at type τ in an...

Accelerating charging dynamics of electric double-layer capacitors

Electric double-layer capacitors (EDLCs), consisting of an ionic fluid between two metallic electrodes, are electrochemical energy storage devices complementary to batteries, allowing for a faster charge/discharge. The charging dynamics in response to a voltage step features a va...

Origin of Long‐Wavelength Variations in Crustal Thickness on Rocky Planets

Abstract Long‐wavelength crustal thickness variations are observed on telluric planets, particularly on Mars and the Moon whereas Mercury appears to lack such variations. They may stem from two early‐stage positive feedback mechanisms that can emerge in stagnant‐lid planets. Both...