Spectral Analysis

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2 domain-specific abstractions whose origin domain is Spectral Analysis.

• Spectral band — Bound a contiguous region on a declared spectral coordinate and type it by the physical feature, allocation rule, or instrument response that selects the region, keeping band limits, bandwidth, and overlap conventions explicit.
• Zeta function regularization — An analytic-continuation method that assigns finite determinants, products, or sums to divergent spectral expressions through an associated zeta function.