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Lapinpöllön pesintä keskeytti hakkuut Pohjois-Savossa, sitten rengastetut poikaset löytyivät puun juurelta tapettuina https://yle.fi/a/74-20171384?origin=rss/Mastodon
Yksityishenkilöt tarjoavat 1 000 euroa vihjeestä, joka johtaa lapinpöllön poikasten tappajan jäljille …

Lapinpöllön pesintä keskeytti hakkuut Pohjois-Savossa, sitten rengastetut poikaset löytyivät puun juurelta tapettuina
Metsähakkuut keskeytyivät, kun Pielaveden ja Kiuruveden rajamailta löytyi lapinpöllön pesä. Poikaset rengastettiin, mutta pian sen jälkeen ne löytyivät puun juurelta surmattuina.

Classical algorithm inspired by the feedback-based algorithm for quantum optimization and local counterdiabatic driving
Takuya Hatomura
https://arxiv.org/abs/2506.09214

Classical algorithm inspired by the feedback-based algorithm for quantum optimization and local counterdiabatic driving
We propose a quantum-inspired classical algorithm for combinatorial optimization problems, named the counterdiabaticity-assisted classical algorithm for optimization (CACAO). In this algorithm, a solution of a given combinatorial optimization problem is heuristically searched with classical spin dynamics based on quantum Lyapunov control of local counterdiabatic driving. We compare the performance of CACAO with that of quantum time-evolution algorithms, i.e., quantum annealing, the feedback-bas…

This https://arxiv.org/abs/2504.14819 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Abstract Continuity Theorem for the Lyapunov Exponents of linear cocycles
We prove the Hölder continuity of Lyapunov exponents for general linear cocycles when the base measures vary in Wasserstein distance, under the assumption of uniform large deviations type (LDT) estimates. This is a measure version of the abstract continuity theorem (ACT) established by Duarte-Klein [Duarte, P. and Klein, S. (2016). Lyapunov exponents of linear cocycles: Continuity via large deviations. Atlantis Studies in Dynamical Systems, 3]. The main obstacle here lies in the fact that the …

A derivative-free Levenberg-Marquardt method for sparse nonlinear least squares problems
Yuchen Feng, Chuanlong Wang, Jinyan Fan
https://arxiv.org/abs/2507.06772

A derivative-free Levenberg-Marquardt method for sparse nonlinear least squares problems
This paper studies sparse nonlinear least squares problems, where the Jacobian matrices are unavailable or expensive to compute, yet have some underlying sparse structures. We construct the Jacobian models by the $ \ell_1 $ minimization subject to a small number of interpolation constraints with interpolation points generated from some certain distributions,and propose a derivative-free Levenberg-Marquardt algorithm based on such Jacobian models.It is proved that the Jacobian models are probabi…

Morse theory and moduli spaces of self-avoiding polygonal linkages
Te Ba, Ze Zhou
https://arxiv.org/abs/2506.06781 https://arxiv.org/…

Morse theory and moduli spaces of self-avoiding polygonal linkages
We show that a smooth manifold is diffeomorphic to a Euclidean space if it admits a Lyapunov-Reeb function. Here a Lyapunov-Reeb function means a smooth function that is proper, bounded from below and possesses only one critical point. As applications, we determine the topology of moduli spaces of self-avoiding polygonal linkages by constructing Lyapunov-Reeb functions, and we prove a conjecture of González and Sedano-Mendoza on moduli spaces of simple polygons. We further describe foliation s…

RIP - SWR 3 Gründervater und Radiolegende Frank Laufenberg mit 80 Jahren gestorben
https://www.swr.de/swraktuell/rheinland-pfalz/frank-laufenberg-gestorben-100.html

#luontokato #hakkuut
https://yle.fi/a/74-20171384?utm_sourc

Lapinpöllön pesintä keskeytti hakkuut Pohjois-Savossa, sitten rengastetut poikaset löytyivät puun juurelta tapettuina
Metsähakkuut keskeytyivät, kun Pielaveden ja Kiuruveden rajamailta löytyi lapinpöllön pesä. Poikaset rengastettiin, mutta pian sen jälkeen ne löytyivät puun juurelta surmattuina.

Some remarks on stochastic converse Lyapunov theorems
Pavel Osinenko, Grigory Yaremenko
https://arxiv.org/abs/2506.06053 https://arxi…

Some remarks on stochastic converse Lyapunov theorems
In this brief note, we investigate some constructions of Lyapunov functions for stochastic discrete-time stabilizable dynamical systems, in other words, controlled Markov chains. The main question here is whether a Lyapunov function in some statistical sense exists if the respective controlled Markov chain admits a stabilizing policy. We demonstrate some constructions extending on the classical results for deterministic systems. Some limitations of the constructed Lyapunov functions for stabili…

Robust output stability and input-to-output stability based on output dissipation
Antoine Chaillet (IUF, L2S), Iasson Karafyllis (NTUA), Yuan Wang
https://arxiv.org/abs/2506.10479

Robust output stability and input-to-output stability based on output dissipation
LaSalle techniques to ensure the convergence of a given output usually fail at guaranteeing uniform convergence time, which induces robustness issues. Recent works have provided extra conditions under which a Lyapunov function that dissipates in terms of only the output guarantees this uniformity. In this paper, we extend these results to systems with inputs in order to establish either robust stability or input-to-output stability. In addition, we show that a recent relaxation of Barb__lat's l…

This https://arxiv.org/abs/2405.10144 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A characterization of physical measures for systems with mixed central behavior
We show that the existence of physical measures for $C^\infty$ smooth instances of certain partially hyperbolic dynamics, both continuous and discrete, exhibiting mixed behavior (positive and negative Lyapunov exponents) along the central non-uniformly hyperbolic multidimensional invariant direction, is equivalent to the existence of certain types of ``regular points'' on positive volume subsets, including Lyapunov regular points. This encompasses the $C^3$ robust class of multidimensional non-…