Delta Zero Theory — Time Gradient, Reverse Time Flow, and t-Equilibrium Conditions (v1.1.1)

This paper presents the Delta Zero Theory in its extended time-domain formulation, introducing both forward (Δt⁺) and reverse (Δt⁻) time flows as complementary components of change. The framework defines t-equilibrium as the condition where these flows balance, and provides a reproducible methodology for detecting and analyzing reverse time influence (Δt⁻) across domains. Using a combination of K-ratio, Reverse Flow Index (RFI), time gradient analysis, and triple energy balance (U³), the study identifies consistent Δt⁻ signatures in phenomena ranging from wood combustion and thermal phase changes to gamma-ray bursts and industrial process transitions. This approach aims to provide both a theoretical basis and a practical detection protocol for time-symmetry deviations.