Clare Hall is pleased to share news that Dr Sandi Setiawan, Life Member of the College, has published a new book titled Primacohedron: Adelic Spectral Geometry of the Primes, released in January 2026 on Amazon.

The book explores a bold and interdisciplinary idea at the intersection of number theory, geometry, and theoretical physics. Rather than treating prime numbers as purely abstract objects, Primacohedron presents a framework in which primes function as fundamental oscillators shaping time, curvature, and information. In this vision, spacetime itself emerges as a coherent spectral structure rooted in arithmetic.

Primacohedron contributes to ongoing conversations across mathematics and physics about the deep relationship between arithmetic structure and the fabric of the universe. Clare Hall congratulates Dr Setiawan on the publication of this ambitious and thought-provoking work!