Cos{T, S<:Integer}(range0, range1, period)
Cos(;λ0, λ1, period)

A cosine annealing schedule (see “SGDR: Stochastic Gradient Descent with Warm Restarts”) The output conforms to

abs(λ0 - λ1) * (1 + cos(π * mod(t - 1, period) / period)) / 2 + min(λ0, λ1)

This schedule is also referred to as “cosine annealing with warm restarts” in machine learning literature.

Arguments

• range0/λ0: the first range endpoint
• range1/λ1: the second range endpoint
• period::Integer: the period