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The 12 pages that link to Infinitesimal, each with the reason it gives.

• CalculusRelated: Early calculus used infinitesimals to reason about instantaneous change and tiny increments.

• Method of exhaustionCompared with: Classical exhaustion avoids treating infinitesimal quantities as actual geometric objects.

• Nonstandard analysisBroader topic: Infinitesimals define closeness and derivatives inside the extended number system.

• Point (geometry)Compared with: An infinitesimal has magnitude; a geometric point has no dimensions at all.

• History of calculusRelated: Early calculus relied on infinitesimal quantities whose foundations remained disputed.

• InfinityCompared with: Infinitesimals are infinitely small, contrasting with infinity's unbounded scale.

• Archimedean propertyCompared with: A positive infinitesimal relative to another positive element is precisely what the property forbids.

• Hyperreal numberBroader topic: Nonzero infinitesimals distinguish the hyperreal system from the real numbers.

• Leibniz notationRelated: Leibniz's differential notation arose from reasoning about infinitesimal changes.

• Guillaume de l’HôpitalRelated: Infinitesimals shaped the calculus foundations that l’Hôpital’s textbook explained.

• John WallisRelated: Wallis’s treatment of infinitely small quantities anticipated ideas later formalized in calculus.

• Standard part functionRelated: The output differs from its input by an infinitesimal.