HistoryAncient/classical (c. 250 CE onward)Mediterranean/Greece; also Indiahigh confidence

In the syncopated stage of mathematical notation, quantities and common algebraic operations began to be represented by symbolic abbreviations.

Notes on verification

Directly corroborated by Wikipedia, cut-the-knot.org, an arXiv history-of-algebra paper, and a peer-reviewed journal article, all consistent on the rhetorical-syncopated-symbolic framework. [tier=gold indep_score=0.983 clusters=3 claim_tier=notable]

Sources

In the syncopated stage of mathematical notation, quantit… · DeepInquiry