Omega HubOmega HubOmega HubMathematician on every Yu-Gi-Oh! TCG Forbidden & Limited List: its status today, when it was banned and each change across all 83 lists.
No. Mathematician is Unlimited on the current TCG list (October 2026), so you can play up to 3 copies.
Mathematician has never been Forbidden in the TCG. It first went on the list in November 2015 (Nov 9, 2015), as Limited.
Mathematician was last on the February 2018 list, as Semi-Limited. It has been Unlimited since May 21, 2018.
TCG (Advanced Format) data from Yugipedia's Historic Forbidden/Limited Chart and each list's page. OCG lists are not included. Card names as printed in the TCG. Source: Yugipedia · Historic Forbidden/Limited Chart