"Tiling with Three Polygons is Undecidable"
Erik D. Demaine; Stefan Langerman 17 Sep 2024
Abstract
We prove that the following problem is co-RE-complete and thus undecidable: given three simple polygons, is there a tiling of the plane where every tile is an isometry of one of the three polygons (either allowing or forbidding reflections)? This result improves on the best previous construction which requires five polygons.
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It remains open whether tiling …
After wearing my cargo pants yesterday and being spoiled by decent sized pockets (I could fit my phone in the front pocket, keys, and lipstick without it falling out when I sit) I’m pissed again about the pockets in my current pants, back pocket I can only put my hand up to my second knuckle in the back (might fit a lipstick but it would fall out) and the front ones, stuff keeps falling out when I sit. I’m going to lengthen the pockets based on the cargo pants pockets, I don’t care if it ‘ruins the line of the pants, and adds bulkiness’ because as I always say, women’s pockets, when pants have them, are bullshit. And I don’t care if they make me look fat because I value function and comfort more. My son can fit a whole keyboard in his. I’ve been gradually lengthening my pockets as I get to them, or wearing a Fanny pack, but had to go to a funeral Sunday and got pissed again about my pockets. I want to empower other women with decent pockets, so we can take over. That poem about seditious pockets comes to mind. Or at least carry phones and keys. Will post photos. #sewing #pockets #womenspants
[ May 2, 2025 - May 3, 2025] Conference or similar: 2025 Mountain-Pacific Meeting of the Society of Christian Philosophers https://philevents.org/event/show/129066
"The German newspaper #Bild also used a screenshot from the video with the caption: "The hunt for Jews has broken out again: Arab mob chases soccer fans in #Amsterdam."
#DW Fact check: False
#Blakes7 Series D, Episode 08 - Games
TARRANT: Well not exactly. These things chuck the lot at you. Flying the real thing's nothing after one of these.
GAMBIT: Countdown eight minutes, still running.
https://blake…
[ April 28, 2025] CFP for publication or other deadline: null https://philevents.org/event/show/127622