Essays from the Institute - worked-out mathematics and physics, meant to be read more than once. Pieces here also appear on our Substack.
A four-part series on why, in cosmology, choosing a clock is a gauge choice - from the constraint analysis of the FLRW scalar field to the contact geometry of the reduced dynamics, and where that picture breaks.
Read the series →The golden ratio is the arithmetic backbone of the icosians, a ring of quaternions that is the rotational symmetry of the icosahedron - and a doorway to E₈.
Read the essay →