Zeta1 Calculation (Internal)

Computes \(Fd^{-2} \times \eta1^2 - Fd^{-1} \times \eta2\), used for partial derivatives.

Usage

zeta1.f(Fd, eta1, eta2)

Arguments

Fd

Numeric value, typically FdG.f(epn, y, H).

eta1

Numeric value, typically eta1G.f(epn, y, H1).

eta2

Numeric value, typically eta2G.f(epn, y, H2).

Value

A numeric value for the zeta1 term.