The name is absent

25

ε is small, then the perturbed voltage and gating variables are assumed to be

v_b = v_b + εv_b + C^,(ε²)

(2.28)

w_bcf = w_bcf + εw_bcf + O(ε²).

(2.29)

Note here that the rest values v_b and w_bcf are now spatially-varying. Substituting
(2.28) into (2.17), we construct a linearized model by solving for the perturbation
terms v_b, w_bcf of order ε. After substitution we find

Qcf

c=l

∕=ι

I ^5b _                       _

- (^gbs + εg_bs{t)')δ(x - x_bs)(y_b + εv_b - E_bs)

(2.30)

ε¾w_6c∕(t) =

w_cf,∞(υ_b + ε⅞) - (wbcf + εw_bcf)

τ_cf (υ_b + εv_b)

(2.31)