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Topic: [HM] question about term "normal"
Replies: 13   Last Post: Dec 7, 2006 4:19 PM

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Gunnar Berg

Posts: 49
Registered: 12/3/04
[HM] Cauchy
Posted: Nov 14, 2006 10:52 AM
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Dear all.
In perusing Cauchys "Cours d'analyse" (1821) I have come across the
following (p.35):

"Enfin, lorsqu'un fonction f(x) cesse d'etre continue dans le voisinage
d'une valeur particuliere de la variable x, on dit qu'elle devient
alors discontinue, et qu'il y a pour cette valeur particuliere
solution de continuite."

What puzzles me is the last phrase - "solution de continuite" -
I simply cannot make any sense of it. What can Augustin-Louis mean?
I look forward to hear from those whose knowledge of Cauchy and his
times are more profound than mine.

From Uppsala, deep in the gloom of November.

Gunnar Berg

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