PR !4#32165: feat(Real/Trigonometric): Add `sum_cos_arith...

Stream: triage

[Random Issue Bot]

Today I chose PR #32165 for discussion!

feat(Real/Trigonometric): Add sum_cos_arith_progression and prepare for Dirichlet kernel
Created by @Yi.Yuan (@yuanyi-350) on 2025-11-27
Labels: awaiting-author, merge-conflict, t-analysis

Is this PR still relevant? Any recent updates? Anyone making progress?