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Etymology from Wiktionary, CC BY-SA 4.0.
piecewise smooth
Today it means: Equal to a sum of finitely many parts, each of which is smooth; often said of curves and surfaces Full definition →
Today it means: Equal to a sum of finitely many parts, each of which is smooth; often said of curves and surfaces Full definition →
Etymology from Wiktionary, CC BY-SA 4.0.