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@arXiv_grqc_bot@mastoxiv.page
2024-03-08 07:01:57

Topology Change from Pointlike Sources
Yasha Neiman, David O'Connell
arxiv.org/abs/2403.04281 arxiv.org/pdf/2403.…

Topology Change from Pointlike Sources
In this paper we study topology-changing spacetimes occurring from pointlike sources. Following an old idea of Penrose, we will opt for a non-Hausdorff model of topology change in which an initial pointlike source is "doubled" and allowed to propagate along null rays into an eventual cobordism. By appealing to recent developments in non-Hausdorff differential geometry, we will describe and evaluate gravitational actions on these pointlike topology-changing spacetimes. Motivated by analogous res…

@arXiv_astrophEP_bot@mastoxiv.page
2024-04-08 07:02:36

Accretion and Uneven Depletion of the Main Asteroid Belt
Rogerio Deienno, David Nesvorny, Matthew S. Clement, William F. Bottke, Andre Izidoro, Kevin J. Walsh
arxiv.org/abs/2404.03791

Accretion and Uneven Depletion of the Main Asteroid Belt
The main asteroid belt (MAB) is known to be primarily composed of objects from two distinct taxonomic classes, generically defined here as S- and C-complex. The former probably originated from the inner solar system (interior to Jupiter's orbit), while the latter probably from the outer solar system. Following this definition, (4) Vesta, a V-type residing in the inner MAB (a < 2.5 au), is the sole D > 500 km object akin to S-complex that potentially formed in-situ. This provides a useful constr…

@Schrank@phpc.social
2024-04-02 06:24:17

Be VERY careful with default configurations in Symfony aka putting files into config/packages!
Why? Let me tell you a story.
winkelwagen.de/2024/04/02/shop

Shopware: Caching on dev
Time to share the pain of today. We are running on ddev. Which is an awesome piece of technology, with an awesome person behind it: Randy Fay. Something is weird For a while I had a weird feeling, …

@flancian@social.coop
2024-02-16 22:30:55

An instant classic:
[[cowsay]] should not be enabled by default github.com/ansible/ansible/iss

Cowsay should not be enabled by default · Issue #10530 · ansible/ansible
Having cows fill my screen when running a playbook is not the expected behavior, and makes it hard to visually parse the output of ansible. Since cowsay is enabled not by a setting, but just by the...

@smurthys@hachyderm.io
2024-03-28 00:16:33

Trepidations but I ask for own #learning: Why does fmt require casting ptr to void*? I assume there are technical reasons (or it wouldn't be required) which I'm just failing to see. Are there links where I can learn more? 🙏🏽
BTW I dabbled a bit to *convince myself* that arbitrary ptr types can be recognized without casting in client code:

Compiler Explorer - C++
//f is highly simplified proxy for fmt

@hikingdude@mastodon.social
2024-04-13 15:14:19

Hey friends, we just finished a 6h walk with about 600m elevation from #badWiessee to #lenggries
We walked some new and some well known trails. Enjoyed the sound of a stream and also cleaned up nature a bit.
Oh and everything by foot or public transport (train and bus). We've be…

A peaceful trail winds through a dense forest, surrounded by towering trees and lush greenery. The ground is covered in a mix of brown dirt and vibrant green grass, creating a natural carpet underfoot. Sunlight filters through the canopy above, casting dappled shadows on the path. The scene is serene and untouched, with no signs of human presence except for the well-worn trail. The forest is a mix of deciduous and evergreen trees, creating a diverse and rich ecosystem. This tranquil woodland se…
A serene scene of a stream gently flowing through a lush forest is depicted in this image. The forest is filled with various shades of green from the trees and plants surrounding the stream. A large rock covered in vibrant green moss sits in the middle of the stream, adding to the natural beauty of the landscape. The water is clear and reflects the surrounding trees and sky. The overall atmosphere is peaceful and tranquil, making it a perfect spot for relaxation and contemplation. The image cap…
A middle-aged man with a grey sun hat and a backpack is captured in the image. He is standing outdoors, surrounded by trees and mountains in the background. The man is smiling and appears to be on a hiking adventure, equipped with hiking gear. He is wearing casual outdoor clothing and sunglasses. The dominant colors in the image are grey, with a blue accent color. The man's face is visible and he is wearing a hat with a wide brim. The image also includes a close-up of a camera. The man is the m…
A peaceful trail winds through a dense forest, surrounded by towering trees and lush greenery. The ground is covered in a mix of brown dirt and vibrant green grass, creating a natural carpet underfoot. Sunlight filters through the canopy above, casting dappled shadows on the path. The scene is serene and untouched, with no signs of human presence except for the well-worn trail. The forest is a mix of deciduous and evergreen trees, creating a diverse and rich ecosystem. This tranquil woodland se…
@j12t@social.coop
2024-02-21 19:58:20

Also, why aren't Wikis #Fediverse-enabled by default? I'd really like to follow certain articles on #Wikipedia, for example.
If you must, it could be following something like @Fediverse@en.wikipedia.org but interpreting the actual URL to the article like

Fediverse - Wikipedia

@cheeaun@mastodon.social
2024-02-20 00:26:23

I see, feels kinda like Twitter/X's "Muted Notifications". tapbots.social/@ivory/11196088
Mastodon has "Block notifications" under Preferences − Notifications − Other Notifications Settings.
Twitter/X also have "Qual…

Screenshot of Twitter/X's settings page for muted notifications with toggle options for muting notifications from people who you don't follow, don't follow you, with a new account, who have a default profile photo, who haven’t confirmed their email, and who haven’t confirmed their phone number.
Screenshot of Mastodon's 'Other Notifications Settings' with options to block notifications from non-followers, from people you don't follow, and direct messages from people you don't follow, with checkboxes next to each option.

Ivory by Tapbots :emoji_wink: (@ivory@tapbots.social)
@colinstu@birdbutt.com There's a few rules in place. An account without followers and not following anyone, no profile photo, not following you, mentioning you and other users in a new post, etc. It's something we will continue to improve over time. But the goal was to get something out quickly to stop this initial problem. 🙂

@j12t@social.coop
2024-02-21 19:58:20

Also, why aren't Wikis #Fediverse-enabled by default? I'd really like to follow certain articles on #Wikipedia, for example.
If you must, it could be following something like @Fediverse@en.wikipedia.org but interpreting the actual URL to the article like

Fediverse - Wikipedia