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@leftsidestory@mstdn.social
2025-06-13 01:49:53

Urban Composition II 🫟
都市构图 II 🫟
📷 Nikon FE
🎞️Ilford FP4 Plus, expired 1995
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

Ilford FP4 E.I. 64 **English Alt Text:** This black-and-white photograph captures a quiet urban scene. In the foreground, there is a sidewalk and a street with visible lane markings. A bench is situated on the sidewalk, positioned against a large wall that appears to be part of a building. The wall has a textured surface and shows signs of wear and tear. The shadows of trees are cast onto the wall, adding a dynamic element to the otherwise static scene. The overall atmosphere is calm and somew…
Ilford FP4 E.I. 64 **English Alt Text:** This black-and-white photograph depicts a stack of construction materials placed in front of a modern building. The materials, which appear to be metal sheets or panels, are neatly bundled and secured with straps. The building behind the materials has a glass facade, reflecting the surrounding environment, including trees and the sky. The image captures a moment of urban development or renovation, with the contrast between the raw construction materials…
Ilford FP4 E.I. 64 **English Alt Text:** This black-and-white image features a close-up view of a modern architectural structure. The photograph is taken from a low angle, capturing the sleek lines and geometric shapes of the building. A curved element, possibly part of a railing or decorative feature, frames the image on the right side. The building's facade is smooth and reflective, with a series of evenly spaced elements that add to its contemporary aesthetic. The contrast between light and…
Ilford FP4 E.I. 64 **English Alt Text:** This black-and-white image captures a person engaged in cleaning or maintenance work on a balcony of a modern building. The individual is silhouetted against the bright background, creating a stark contrast that highlights their activity. The building has a glass facade, and part of it is covered with a protective sheet, possibly for renovation or cleaning purposes. The scene is framed by the railing of the balcony, and the surrounding environment, incl…

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@arXiv_mathCO_bot@mastoxiv.page
2025-06-10 17:15:39

This arxiv.org/abs/2407.01101 has been replaced.
initial toot: mastoxiv.page/@arXiv_mat…

Packing Density of Sets With Only Two Nonmixed Gaps
For a finite set of integers such that the first few gaps between its consecutive elements equal $a$, while the remaining gaps equal $b$, we study dense packings of its translates on the line. We obtain an explicit lower bound on the corresponding optimal density, conjecture its tightness, and prove it in case one of the gap lengths, $a$ or $b$, appears only once. This is equivalent to a Motzkin problem on the independence ratio of certain integer distance graphs.