physics
Articles with this tag
by Nusa
April 19 2026
Why Torsion Can't Be a Perturbation in This Instantiation
Geometric Unity does not introduce torsion as an extension of GR; it introduces it as the only covariant coordinate on the space of connections. This post explains why torsion must be defined as a difference variable relative to a background connection, and why treating it perturbatively is meaningless.
by Nusa
April 19 2026
Two Geometries Problem: Riemann vs Ehresmann
Modern physics rests on two incompatible geometric formalisms: Riemannian geometry for gravity and Ehresmann (connection-based) geometry for gauge fields. This post isolates the precise obstruction to unifying them and explains why Geometric Unity (GU) does not attempt to merge them naively, but instead replaces a single crucial operation.
by Nusa
April 18 2026
Physics on Y, Experience on X
Geometric Unity separates where physics lives from where it is experienced. This post introduces the native vs invasive distinction and explains how pullback filters physical content.
by Nusa
April 18 2026
Second-order theory as a square: what you gain, what you lose
The square is where you buy robustness, at the price of admitting extra solutions.
by Nusa
March 22 2026
First order torsion-first field equation: structure and interpretation
If torsion-first is going to mean anything operational, the action has to be written in variables you are actually allowed to vary. The only thing you can safely push through an Euler-Lagrange variation is a covariant field on $Y.$ That field is the augmented torsion $T.$