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Infinitesimal - Wikipedia
Infinitesimal Definition & Meaning - Merriam-Webster
INFINITESIMAL | English meaning - Cambridge Dictionary
INFINITESIMAL Definition & Meaning | Dictionary.com
Infinitesimal | Calculus, Limits & Analysis | Britannica
Infinitesimal -- from Wolfram MathWorld
Infinitesimal - Definition, Meaning & Synonyms | Vocabulary.com
Infinitesimal Definition (Illustrated Mathematics Dictionary)
INFINITESIMAL definition | Cambridge English Dictionary
Infinitesimals | Calculus, Mathematics & History | Britannica