“I… subjoin references to those parts of the work for which I have not been indebted to my knowledge of what has been written before me: much of what is cited is probably not new, indeed it is dangerous for any one at the present day to claim anything as belonging to himself; several things which I once thought to have entered in this list have been since found (either by myself, or by a friend to whom I referred it) in preceding writers.”

Preface, p. v
The Differential and Integral Calculus (1836)

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Augustus De Morgan41

British mathematician, philosopher and university teacher (… 1806–1871

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Augustus De Morgan (1806–1871) British mathematician, philosopher and university teacher (1806-1871)

Author's Preface
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Augustus De Morgan41

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