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📖 **A Rare 15th-Century Black Book of Hours Is Getting a Long-Awaited Restoration**

“_The Black Book of Hours is one of only seven known surviving black vellum illuminated manuscripts made by Flemish artists between 1455 and 1480.”_

🔗 news.artnet.com/art-world/tefa.

@bookstodon

🇺🇸 **Tariffs are Already Stalling the Economy**

“_Tariff Front-Running is Already Showing Up as Reductions in US GDP Growth_”

🔗 apricitas.io/p/tariffs-are-alr.

@economics

**A Hyper-Catalan Series Solution to Polynomial Equations, and the Geode**

“_....the hyper-Catalan numbers 𝐶𝐦 count the number of subdivisions of a polygon into a given number of triangles, quadrilaterals, pentagons, etc. (its type 𝐦), and we show that their generating series solves a polynomial equation of a particular geometric form. This solution is straightforwardly extended to solve the general univariate polynomial equation._”

Wildberger, N. J. and Rubine, D. (2025) ‘A Hyper-Catalan Series Solution to Polynomial Equations, and the Geode’, The American Mathematical Monthly, pp. 1–20. doi: doi.org/10.1080/00029890.2025..

A mere coincidence?

Flipboard UK  
Global CEO pay has increased 56 times more than worker wages since 2019 https://www.euronews.com/2025/05/01/global-ceo-pay-has-increased-56-times-m...

No better time than now to get off platforms such as and onto .

BBC News  
Xbox price rises by £50 amid tariff uncertainty https://www.bbc.com/news/articles/cze1zn9d9p4o?utm_source=flipboard&utm_medium=activitypub Pos...

Now, this one is truly interesting in terms of economic news:

Foreign Buyers’ Strike Threatens Dollar’s Reign as U.S. Capital Flows Stall (Deutsche Bank)

quiverquant.com/news/Foreign+B

Key quotes:

- Deutsche Bank identifies a halt in foreign purchases of U.S. stocks and bonds.
- ETF flows show active selling of U.S. bonds and stagnation in equity inflows.
- Dollar at risk as a twin-deficit currency amid capital outflow concerns.

1/x 🧵

**Threshold fertility for the avoidance of extinction under critical conditions**

“_The results indicate that the fertility rate should exceed 2.7 to avoid extinction. The extinction threshold is reduced by a female-biased sex ratio. We argue that the present results explain the observed phenomena of female-biased births under severe conditions as an effective way to avoid extinction._”

Cuaresma DCN, Ito H, Arima H, Yoshimura J, Morita S, et al. (2025) Threshold fertility for the avoidance of extinction under critical conditions. PLOS ONE 20(4): e0322174. journals.plos.org/plosone/arti.

@anthropology

🇨🇦 🇲🇽 **Travel companies say Canadians are canceling US travel — and opting for this destination instead**

“_Mexico has emerged as a popular alternative for Canadian travelers skipping the US._”

🔗 businessinsider.com/canadians-.

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