AE: Artificial Emotion — Technical Formalism V2.0

published a conceptual framework for biosignal-based emotional architecture in AI (AE — Artificial Emotion) and received feedback that the formalism was missing.
I have now written the technical version. Key contributions:
• Emotional State Vector formally defined as element of complete metric space (R²⁰, d_ESV)
• Sparx Index defined as HF band coherence Γ ∈ [0,1] — proved bounded via Cauchy-Schwarz
• Emotional Fourier Transform as bounded linear operator on L² — isometry via Plancherel
• Four-module signal processing pipeline with transfer functions
• Three falsifiable propositions with pre-specified statistical tests
• 20 citations — Porges, McCraty, Dumas, Thayer, Task Force 1996
DOI: 10.5281/zenodo.18917446
Genuinely looking for: errors in the mathematics, better feature sets than d=20, prior work I have missed, or anyone working in adjacent areas (affective computing, HRV, EEG hyperscanning).