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analysis (differential/integral calculus, functional analysis, topology)
metric space, normed vector space
open ball, open subset, neighbourhood
convergence, limit of a sequence
compactness, sequential compactness
continuous metric space valued function on compact metric space is uniformly continuous
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The “Mercator series” (so named after its appearance in Mercator 1667) is the Taylor series of the natural logarithm around 1.
\begin{proposition}\label{MercatorSeries} The Taylor series of the natural logarithm around is the following series:
\end{proposition} \begin{proof} For the first two terms notice that
and that the derivative of the natural logarithm is:
From here on, noticing for that:
we get, obtain for, by induction:
Plugging this into the defining equation on the left of (1) and using
yields the claim. \end{proof}
Note that this is not named for Gerardus Mercator, the cartographer with the famous map projection, but the mathematician Nicholas Mercator.
Apparently first published in:
but will have been known before that.
See also:
Last revised on July 25, 2021 at 07:40:01. See the history of this page for a list of all contributions to it.