Talk:Function of several real variables: Difference between revisions

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:Unfortunately, I have badly organized the sections and will try and fix that also.
:One question - in the list above you included "Tangent hyperplane to the graph of the function, expressed in term of the gradient" - why was that deleted? And I didn't think the subsection it was in ("Curved hypersurfaces") was ''completely'' off-topic as it would offer more geometric insight to multivariable functions. No matter. [[user:Maschen|'''M&and;''Ŝ''''']][[special:contributions/Maschen|''c''<sup>2</sup>''ħ''ε]][[user talk:maschen|''И<sub>τlk</sub>'']] 09:08, 1 July 2013 (UTC)
::I have considered the section "Tangent hyperplane to the graph of the function, expressed in term of the gradient" as off-topic because of the emphasis on geometry and equations, which does not belong to the subject of the article. Moreover, it supposes that the reader knows about high dimensional geometry and hypersurfaces. However a section on the best approximation of a differentiable function by a linear function would have almost the same mathematical content and fit exactly the subject of the article.
:: About the generalities, I'll propose soon a new presentation. [[User:D.Lazard|D.Lazard]] ([[User talk:D.Lazard|talk]]) 14:14, 1 July 2013 (UTC)