Does anyone know the origin of the evaluation bar? (The vertical bar). Does anyone know when it was first used in Calculus? I tried to find info in Cajori's "History of Mathematical Notation" but couldn't find anything. I would like to know both who first used it at all and who first used it in definite integration.
2026-03-25 05:46:58.1774417618
Origin of Evaluation Bar
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