What We Are Reading Today: Celestial Encounters

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Updated 11 December 2020
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What We Are Reading Today: Celestial Encounters

Celestial Encounters is for anyone who has ever wondered about the foundations of chaos. In 1888, the 34-year-old Henri Poincaré submitted a paper that was to change the course of science, but not before it underwent significant changes itself. “The Three-Body Problem and the Equations of Dynamics” won a prize sponsored by King Oscar II of Sweden and Norway and the journal Acta Mathematica, but after accepting the prize, Poincare found a serious mistake in his work. While correcting it, he discovered the phenomenon of chaos.

Starting with the story of Poincare’s work, Florin Diacu and Philip Holmes trace the history of attempts to solve the problems of celestial mechanics first posed in Isaac Newton’s Principia in 1686. In describing how mathematical rigor was brought to bear on one of our oldest fascinations — the motions of the heavens — they introduce the people whose ideas led to the flourishing field now called nonlinear dynamics.

In presenting the modern theory of dynamical systems, the models underlying much of modern science are described pictorially, using the geometrical language invented by Poincare.


Saudi 100 Brands brings fashion to Saudi Cup 2026

Updated 13 February 2026
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Saudi 100 Brands brings fashion to Saudi Cup 2026

DUBAI: The Saudi Fashion Commission’s Saudi 100 Brands program is part of the Saudi Cup 2026, held from Feb. 13-14 at King Abdulaziz Racecourse in Riyadh. 

The event marks the fourth year in a row that the initiative has featured at the internationally recognized sporting and cultural event.

The fashion program is spread over two days, with runway presentations scheduled throughout the evenings. On Feb. 13, collections were presented by Saudi fashion brands THEXO, Enays and Sulitude. Feb. 14 features runway shows by MD29, Adara By Fa and Hajruss. 

Alongside the runway program, a dedicated exhibition space showcases selected jewelry and accessories pieces, allowing visitors to view the work up close.

Participating designers will present collections that draw on Saudi references while engaging with contemporary design, offering insight into how local fashion continues to develop. 

“Since 2022, the Saudi 100 Brands program has been an integral part of the Saudi Cup, positioning fashion as a cultural expression within one of the Kingdom’s most globally visible events,” said Saudi Fashion Commission Chief Executive Burak Cakmak, according to the Saudi Press Agency.

“This platform has enabled brands to bring together heritage and contemporary narratives that reflect identity, creativity and innovation,” Cakmak said. “This year represents a natural evolution from an exhibition to a curated showcase, reinforcing fashion’s role as a dynamic cultural platform within the Saudi Cup.”