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@arXiv_mathCO_bot@mastoxiv.page
2025-06-25 09:56:00

The Origami flip graph of the $2\times n$ Miura-ori
Lumi Christensen, Thomas C. Hull, Emma O'Neil, Valentina Pappano, Natalya Ter-Saakov, Kacey Yang
arxiv.org/abs/2506.19700

@arXiv_astrophGA_bot@mastoxiv.page
2025-06-26 09:31:50

Water vapour masers in long-period variable stars IV. Mira variables RCas, oCet and RLeo
Jan Brand, Dieter Engels, Alessandra Zanichelli, Sandra Etoka
arxiv.org/abs/2506.20328

@leftsidestory@mstdn.social
2025-06-22 00:30:01

Park Discovery 🏞️
公园探险 🏞️
📷 Nikon FE
🎞️Lucky SHD 400
buy me ☕️ ?/请我喝杯☕️?
#filmphotography

**English:**
This black-and-white photograph depicts a small outdoor kiosk or stall. The kiosk is adorned with various plush toys, prominently featuring several Mickey Mouse dolls hanging at the top. Below the toys, there are shelves stocked with small items, possibly keychains or small trinkets. The front of the kiosk displays images of ice cream cones and bottles of beverages, suggesting that it might also sell refreshments. The setting appears to be a park or a fair, with trees and a fence v…
English alt text: A black and white photo of a park path flanked by evenly spaced trees with their trunks painted white at the base. A few people walk quietly along the paved walkway, framed by natural foliage. Trash bins are visible in the background, contributing to the everyday tranquility of the scene.

中文替代文本(Chinese alt text):一张黑白照片展示了一条公园小路,路两旁是整齐排列的树木,树干下部涂有白漆。几位行人安静地走在铺设的步道上,周围环绕着自然景色。背景中可见垃圾桶,为这幅日常宁静的画面增添了现实感。
English alt text: Two large ducks shaped object float in a narrow water channel. One duck is in the foreground, reflected in the water, while the other is partially hidden behind a metal grid structure. The scene features an interesting contrast between the playful shapes of the ducks and the rigid geometry of the metal structure. Trees and a building with windows are visible in the background.

中文替代文本(Chinese alt text):两只大型鸭型物漂浮在一条狭窄的水渠中。一只靠近前方,在水中有清晰倒影;另一只则部分被左侧的金属网格结构遮挡。画面中趣味盎然的鸭子与硬朗的金属框架形成鲜…
English alt text: A wooden platform nestled among tall trees, covered by a striped canopy. A person stands on the platform, which is accessed by a stairway. Beneath the structure is a bilingual sign, possibly in Chinese, and fencing and foliage frame the background, suggesting a serene park or nature retreat.

中文替代文本(Chinese alt text):一座建在高大树木之间的木质平台,上方覆盖着条纹遮阳篷。一人站在平台上,通往平台的楼梯清晰可见。平台下方有一块双语标牌(可能含有中文),背景中的树木和围栏营造出宁静的自然氛围。
@arXiv_physicssocph_bot@mastoxiv.page
2025-06-26 08:05:10

Evolutionary dynamics of pairwise and group cooperation in heterogeneous social networks
Dini Wang, Peng Yi, Gang Yan, Feng Fu
arxiv.org/abs/2506.19996

@pre@boing.world
2025-06-02 20:28:08
Content warning: re: Doctor Who - Reality War
:tardis:

Confusing episode. Let me clear it all up.
The world is sinking into the doubt needed to rescue Omega, remember, and The Doctor is falling with a balcony that's separated from the building.
How does he get out of that?
Well, saved by a literal magic door that pops out of nowhere, leading back to the time hotel. 🤨
Anita, who he spent a year with once a couple of Christmases ago, has been popping around the Doctor's entire long life, peeping on him with the Daleks and stuff. Trying to find him on the Earth's last day. Today.
And now he's rescued, today turns into a groundhog day. Same day over and over again. 😆
There's another woman that's been stalking him through time lately, Mrs Flood. She was following him everywhere, but she had Xmas off she reckons, so didn't see the Time Hotel bit. Thus the element of surprise in the deus ex machina rescue. 😀
The Doctor is broken free of the wish spell now anyway, popped his conditioning, and can use the time hotel's door to recall Unit and break them all out of the wish too.
The Rani pops in to say hi and explain her plans. 😝
How did the Rani survive the end of the Timelords? She flipped her DNA to sidestep the genetic bomb apparently? Well that makes no sense, but nor does anything else so no time to ponder.
The end of the Time Lords made them all Barons... No, made them barren. There can be no more children of the time-lords.
She's popping Omega back out of the underworld for his DNA because the timelords are all barren and she wants to recreate Galifrey.
But wait a minute: Poppy is the Doctor's kid in wish world! So she should have Timelord DNA too! Maybe that could work?
No. The Rani is a nazi, don't like the kid's contaminated blood. She's got human all over her DNA. Eww.
Rani pops off back to her Bone Palace, and makes the bone beasts attack.
The Doctor explains that the Giant dinosaur skeletons are beasts that pop in to clean up the world when there's a reality flux, and the Rani has turned them on Unit HQ.
So the UNIT HQ turns into some kinda ship? Like the Crimson Permanent Insurance. Lol. It's blasting lasers at the bone beasts and turning around, and has a steering wheel like pirate ship now. 🤣
During the battle, the Doctor pops out to take a ride on the sky-bike, looking like something from Flash Gordon, and crashes into the Bone Palace.
Too late though! Omega is pretty much here now. He's a giant boney CGI zombie, become his own legend. Looks great but doesn't really seem like Omega, who ought to be held together by pure will.
Omega eats the Rani! One of the Ranis anyway. Mrs Flood avoids being eaten. She pops off with the time bracelet. "So much for the Two Rani's. It's a goodnight from me!" as she disappears off into time. Great gag. 😁
The Doctor just shoots Omega to get him back into his box. Pops a rifle off the wall. The Vindicator has apparently also got a built in laser as well as locator beacons. So that's handy. The Doctor doesn't use guns but some of his devices work like one. 🔫
So all is well! The day is saved and the wish is over and baby Poppy survives in a time box! 🍻
They're going to take the space baby off to do space adventures. Ruby is jealous of seeing The Doctor and Belinda vibing like that, as they plan a life in space with the space baby. Aww. Poor Ruby. 😭
But then Poppy pops off! Disappears entirely, and everyone other than Ruby forgets. Ruby remembers because she's disappeared from time herself in the past they say.
Okay: to save his child and on Ruby's word alone, the Doctor will sacrifice himself to turn reality one degree.
He goes off to commit suicide by Regeneration, but Thirteen is here! She's popped out of her timeline to stop him! Or maybe to help, with a motivational chat instead. Gives him a pep talk then pops back off again.
The Doctor zaps reality with his Tardis, dying but holding off on the actual regeneration for a few moments to go check on the kid.
The kid is safe! But isn't his own kid any more. Poppy has popped all her Timelord DNA and is just all human now. Poppy's pop isn't the doc, it's someone called Richie.
And Belinda has been so keen to get home all this time in order to get back to her Baby! Who isn't a timelord, and definitely didn't exist until she was wished into being.
This may not be the most ethical action The Doctor has ever taken: To bend the whole universe in order to recreate a baby that was accidentally wished into being out of nothing. Twisting time to give a child to a nurse who didn't previously have a child, or even remember the wish. Then it's not even the same child that disappeared, coz this one is all human. 🤷
But the doc is popping off to regenerate with Joy in the stars, and... Turns blonde: "oh. Hello?" 🤯
It's Rose! Billie Piper is back? Fantastic!
Is Rose doing a David Tennant Impression there?
Billie playing the Doctor, doing a Tennant impression as Bad Wolf? Amazing. Can't wait.
:tardis:
#doctorWho

@akosma@mastodon.online
2025-06-21 18:48:57

"Objective-C is a West Coast language. Objective-C is a hippie. You throw stuff at it and it just trusts you. “Peace maaaaaannn… if you say this is an NSArray I believe you…” and it leans back in its armchair, smoking weed, listening to Marley, Floyd, Doors, or Janis, looking at you with deep eyes, telling you stories about Buddhism and how important is ecology, and that tonight they are going to a retreat in the beach to pray for Yemanjš and the salvation of dolphins."

@arXiv_mathCO_bot@mastoxiv.page
2025-06-25 09:26:00

Sturmian lattices and Aperiodic tile sets
Shigeki Akiyama, Tadahisa Hamada, Katsuki Ito
arxiv.org/abs/2506.19362 arxi…

@mpsgoettingen@academiccloud.social
2025-06-12 08:31:58

First images of the Sun's south pole!
Solar Orbiter is the first space probe to look at the Sun's poles – and finds the magnetic field there in a state of turmoil. The Sun's magnetic field is currently undergoing a flip. During its latest flyby of the Sun at the end of March this year, the Solar Orbiter space probe had its first clear view of our star's poles. First images:

This image shows a magnetic field map from Solar Orbiter's Polarimetric and Helioseismic Imager (PHI) instrument, centred on the Sun's south pole. Blue indicates positive magnetic field, pointing towards the spacecraft, and red indicates negative magnetic field.  On an off-set concentric grid with an overall yellow base color, blue and red bent stripe-like structures are sprinkled across the field of view. © ESA & NASA/Solar Orbiter/PHI Team, J. Hirzberger (MPS)
@arXiv_hepth_bot@mastoxiv.page
2025-06-23 10:16:20

Dislocations and crystallization dynamics of chiral soliton lattices
Minoru Eto, Kentaro Nishimura, Muneto Nitta
arxiv.org/abs/2506.16354

@leftsidestory@mstdn.social
2025-06-18 00:30:08

Urban Living II 🌝
都市生活 II 🌝
📷 Nikon FE
🎞️Lucky SHD 400
buy me ☕️ ?/请我喝杯☕️?
#filmphotography

**English:**
This black-and-white photograph shows a modern urban scene with a sheltered area for scooters and bicycles. The shelter has a flat roof supported by uniquely shaped pillars. Several scooters are parked under the shelter, and a person is seen riding a bicycle on the adjacent path. The background features trees and a few pedestrians, suggesting a park or recreational area. The image captures a moment of everyday life in a city setting.

**Chinese:**
这张黑白照片展示了一个现代城市场景,其中有一个为摩托车和自行车提供的…
**English:**
This black-and-white photograph captures an industrial scene featuring a bridge-like structure elevated on pillars. The structure extends horizontally across the image, leading the eye towards two tall smokestacks in the background. The smokestacks are part of an industrial facility, hinting at a factory or plant. The foreground is filled with dense foliage, providing a stark contrast to the industrial elements. The sky is clear, adding to the sharpness and contrast of the image.

…
**English:**
This black-and-white image depicts a covered walkway or corridor with a series of evenly spaced columns supporting the roof. The perspective is from one end of the walkway, looking towards the other end where a few people can be seen walking. The walkway is paved and flanked by greenery on both sides, creating a serene and orderly atmosphere. The light filters through the structure, casting shadows and highlighting the architectural details.

**Chinese:**
这张黑白图片描绘了一个有顶棚的走廊或通道,一系列均匀…
**English:**
This black-and-white image features a tree with sprawling branches in the foreground, partially obscuring the view. Behind the tree, there is a whimsical scene with two large panda sculptures, one of which appears to be sitting and holding a small object. The background includes a body of water and a large building, possibly indicating an urban park or a recreational area. The overall composition creates a playful and intriguing atmosphere.

**Chinese:**
这张黑白图片的前景是一棵枝叶繁茂的树,部分遮挡了视线。…