Simple projection-free algorithm for contextual recommendation with logarithmic regret and robustnessMar 21, 2026·Shinsaku Sakaue· 0 min read PAPERTypePreprintPublicationarXiv [cs.LG]Last updated on Mar 21, 2026 ← Non-stationary online structured prediction with surrogate losses May 1, 2026From average sensitivity to small-loss regret bounds under random-order model Feb 10, 2026 →