Results 51 to 60 of about 665 (180)
Simulating Quantum State Transfer Between Distributed Devices Using Noisy Interconnects
Advanced Quantum Technologies, Volume 9, Issue 3, March 2026.Noisy connections challenge future networked quantum computers. This work presents a practical method to address this by simulating an ideal state transfer over noisy interconnects. The approach reduces the high sampling cost of previous methods, an advantage that improves as interconnect quality gets better.
Marvin Bechtold +3 more
wiley +1 more source
Nonidentifiability of Within‐Cluster Dependence Parameters in Analytic Survey Inference
WIREs Computational Statistics, Volume 18, Issue 1, March 2026.Superpopulation parameter pairs with equiprobable observed‐outcome probabilities in Example 1. If only the nonrandom inclusion weights were known, along with the sampled data, all the red plotted points (each with its own sampling‐mechanism parameter values) yield equal likelihoods.
Eric V. Slud
wiley +1 more source
On isomorphism of minimal direct summands
Hokkaido Mathematical Journal, 1994 A subgroup \(A\) of a \(p\)-primary abelian group \(G\) is purifiable if there is a minimal pure subgroup of \(G\) containing \(A\). A given subgroup may or may not possess a pure hull. The paper is concerned with generalizations of ``purifiable''. A subgroup \(A\) is almost-dense in \(G\) if every pure subgroup containing \(A\) is dense in \(G\) (in ...
openaire +3 more sources
Extreme‐weather risk and the cross‐section of stock returns
Journal of Risk and Insurance, Volume 93, Issue 1, Page 163-198, March 2026.Abstract We document an extreme‐weather risk premium in the cross‐section of stock returns. Between 1995 and 2019, stocks of domestic U.S. firms with the most negative sensitivity to aggregate storm losses earned an annual excess‐return spread of more than 6 percentage points relative to those with the most positive sensitivity, a difference not ...
Alexander Braun +2 more
wiley +1 more source
On goodness‐of‐fit testing for self‐exciting point processes
Scandinavian Journal of Statistics, Volume 53, Issue 1, Page 102-139, March 2026.Abstract Despite the wide usage of parametric point processes in theory and applications, a sound goodness‐of‐fit procedure to test whether a given parametric model is appropriate for data coming from a self‐exciting point process has been missing in the literature.
José Carlos Fontanesi Kling +1 more
wiley +1 more source
Direct summands of klt singularities
Inventiones mathematicaeWe show that direct summands (or more generally, pure images) of klt type singularities are of klt type. As a consequence, we give a different proof of a recent result of Braun, Greb, Langlois and Moraga that reductive quotients of klt type singularities are of klt type.
openaire +2 more sources
Multivariate representations of univariate marked Hawkes processes
Scandinavian Journal of Statistics, Volume 53, Issue 1, Page 140-174, March 2026.Abstract Univariate marked Hawkes processes are used to model a range of real‐world phenomena including earthquake aftershock sequences, contagious disease spread, content diffusion on social media platforms, and order book dynamics. This paper illustrates a fundamental connection between univariate marked Hawkes processes and multivariate Hawkes ...
Louis Davis +3 more
wiley +1 more source
Local cohomology properties of direct summands
Journal of Pure and Applied Algebra, 2012 8 pages. References updated.
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On universal‐homogeneous hyperbolic graphs and spaces and their isometry groups
Bulletin of the London Mathematical Society, Volume 58, Issue 3, March 2026.Abstract The Urysohn space is the unique separable metric space that is universal and homogeneous for finite metric spaces, that is, it embeds any finite metric space any isometry between finite subspaces extends to an isometry of the whole space. We here consider the existence of a universal‐homogeneous hyperbolic space. We show that for δ>0$\delta >0$
Katrin Tent
wiley +1 more source
A characterisation of snowflakes via rectifiability
Bulletin of the London Mathematical Society, Volume 58, Issue 3, March 2026.Abstract We prove a generalisation to every metric space of Tyson–Wu's characterisation of metric spaces biLipschitz equivalent to snowflakes, by removing compactness, doubling and embeddability assumptions. We also characterise metric spaces that are biLipschitz equivalent to a snowflake in terms of the absence of non‐trivial metric 1‐currents in ...
Emanuele Caputo, Nicola Cavallucci
wiley +1 more source