Talk:Subderivative
Latest comment: 5 months ago by 2A01:E0A:285:6360:F101:C327:A0F0:AD7F in topic Converse on the mean value theorem
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Convex-analytic subgradient, then subdifferential, then generalizations.
editIn convex analysis, the subdifferential is the set of subgradients.
In nonsmooth analysis, Ioffe has stated that other subdifferentials reduce to the convex-analysis subdifferential for convex functions.
Subderivatives are primitive objects from which subdifferentials are constructed.
These statements suggest that the article should be entitled subgradient, not subderivative. It should first discuss the convex-analysis subdifferential and then generalizations (subderivatives of Dini, Frechet, etc.). Kiefer.Wolfowitz 16:57, 30 September 2011 (UTC)
Converse on the mean value theorem
editI think this might be confusing 2A01:E0A:285:6360:F101:C327:A0F0:AD7F (talk) 05:57, 31 May 2024 (UTC)