@heiseonline@social.heise.de2026-07-14 14:13:22
Meta so: "Wir machen KI." Auch Meta: baut praktisch eine neue Stadt... 🏙️ Der Konzern lässt in Louisiana seinen Hyperion-Campus entstehen, der auf knapp 16 Quadratkilometern zu den flächenmäßig größten Rechenzentrumsprojekten weltweit zählen soll. 🏗️
Zum Artikel: https://…
@totientfunction@mathstodon.xyz2026-08-14 18:33:36
Shiny Blob in St. Pölten beim @… Sommerfest
#BlobOnTour #hackmas #hackmas26
@fanf@mendeddrum.org2026-10-11 08:42:02
from my link log —
Flattening quadratic Béziers.
https://raphlinus.github.io/graphics/curves/2019/12/23/flatten-quadbez.html
saved 2019-12-24
@presseportal_pol_NDS@frawas.de2026-08-12 11:23:15
POL-EL: Lingen - Waldbrand an der Rheiner Straße Lingen (ots) - Am Mittwochmorgen, 12. August 2026, ist im Bereich eines Waldstücks an der Rheiner Straße in Lingen eine etwa 3.000 Quadratmeter große Wald- und Vegetationsfläche in Brand geraten. Die Brandmeldung ging gegen 5:36 Uhr bei den ... https://www.presseportal.de…
@jorgecandeias@mastodon.social2026-08-12 18:25:34
Onde se prova que estš mesmo a ocorrer um #eclipse. Os buraquinhos deviam aparecer quadrados, não em crescente.
@macandi@social.heise.de2026-10-02 13:55:02
@funkvolk@mastodon.social2026-08-11 09:17:31
Wasser sparen müssen wegen Brandbekämpfung ist auch neu 😯
https://www.tagesschau.de/inland/regional/hessen/waldbraende-hessen-wasser-sparen-100.html
@arXiv_mathKT_bot@mastoxiv.page2026-08-11 07:37:50
Invariance of Grothendieck-Witt groups under subintegral extensions and cancellation of quadratic spaces
Jebasingh R
https://arxiv.org/abs/2608.08012 https://arxiv.org/pdf/2608.08012 https://arxiv.org/html/2608.08012
arXiv:2608.08012v1 Announce Type: new
Abstract: Motivated by the work of Ischebeck on the behaviour of algebraic $K$-theoretic functors under subintegral extensions, we investigate the analogous question in Hermitian $K$-theory. We prove that Grothendieck-Witt groups in degree zero are invariant under subintegral extensions. We also investigate the cancellation problem for quadratic spaces over geometric subrings of polynomial rings and establish a cancellation theorem for quadratic spaces of sufficiently large Witt index.
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@arXiv_hepth_bot@mastoxiv.page2026-08-14 08:12:53
Edge physics and the Casimir interaction in Maxwell--Chern--Simons theory on a strip
Nicola Maggiore
https://arxiv.org/abs/2608.12622 https://arxiv.org/pdf/2608.12622 https://arxiv.org/html/2608.12622
arXiv:2608.12622v1 Announce Type: new
Abstract: We study Maxwell--Chern--Simons theories on a strip $\mathcal M=\mathbb R^{1,1}\times[0,h]$ within the Symanzik framework for quantum field theory with boundaries. We add the most general local boundary functional within the quadratic one-tangential-derivative truncation adopted throughout the paper and derive the admissible boundary conditions from locality and the variational principle, with gauge symmetry implemented through boundary Ward identities. The strip supports two boundary $U(1)$ current algebras, with opposite levels fixed by the Chern--Simons coupling $\kappa$ and by boundary orientation, while edge velocities depend on local boundary couplings. They are equal and opposite on the flip-symmetric branch, which is the natural choice for a spatially symmetric strip. The same boundary data determine the reflection coefficients for bulk modes and yield a closed determinant (scattering) representation of the finite interaction energy. In the Maxwell limit ($\kappa=0$) the inter-edge interaction is long-ranged and produces a power-law Casimir force, whereas in Maxwell--Chern--Simons theory the topological mass $m=\kappa g^2$ generates Yukawa suppression at large separations $mh\gg1$. The determinant form also gives analytic control of the asymptotic regimes and separates topological boundary data (levels and anomaly inflow) from dynamical bulk effects (dispersion, boundary mixing and Casimir interaction).
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@arXiv_hepth_bot@mastoxiv.page2026-08-14 07:51:53
A Lapse in the Cosmological Constant Problem with Bulk Dynamics
Justin Khoury, Benjamin Muntz, Antonio Padilla
https://arxiv.org/abs/2608.12460 https://arxiv.org/pdf/2608.12460 https://arxiv.org/html/2608.12460
arXiv:2608.12460v1 Announce Type: new
Abstract: We have previously proposed a new approach to the cosmological constant problem based on anisotropic scaling in a compact extra dimension. In the ultra-local $z=0$ limit, the interplay between a projectable lapse, foliation-preserving diffeomorphisms, and higher-form fluxes renders the gravitational field equations insensitive to radiative corrections to the matter vacuum energy. Here we extend this framework beyond the ultra-local limit by introducing $z=1$ deformations that restore dynamics along the compact direction. We show that vacuum-energy cancellation persists at the level of the background equations, while generic extrinsic-curvature couplings propagate an additional scalar ghost. A healthy quadratic spectrum selects the Fierz-Pauli relation between these couplings. This motivates a particularly simple realization in terms of five-dimensional Einstein gravity, a top-form flux, and a spacelike khoron scalar field that dynamically defines a preferred projectable foliation. In this covariant formulation, the global constraint arises from an auxiliary einbein on the space of khoron leaves, and constant shifts of the renormalized matter vacuum energy cancel algebraically from the intrinsic Einstein equations. Finally, allowing matter to propagate around the compact dimension generates finite, topology-sensitive Casimir contributions that are not automatically removed by the mechanism. Suppressing these contributions requires additional spectral conditions on the propagating bulk degrees of freedom.
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