Editing Differentiable curve (section)

=== Aberrancy ===
The [[third derivative]] may be used to define '''aberrancy''', a metric of [[Circle|non-circularity]] of a curve.<ref>{{cite journal|last=Schot|first=Stephen|title=Aberrancy: Geometry of the Third Derivative|journal=Mathematics Magazine|date=November 1978|volume=51|series=5|issue=5|pages=259–275|jstor=2690245|doi=10.2307/2690245}}</ref><ref>{{cite journal | title=Measures of Aberrancy | journal=Real Analysis Exchange | publisher=Michigan State University Press | volume=32 | issue=1 | year=2007 | issn=0147-1937 | doi=10.14321/realanalexch.32.1.0233 | page=233| last1=Cameron Byerley | last2=Russell a. Gordon | doi-access=free }}</ref><ref>{{cite journal | last=Gordon | first=Russell A. | title=The aberrancy of plane curves | journal=The Mathematical Gazette | publisher=Cambridge University Press (CUP) | volume=89 | issue=516 | year=2004 | issn=0025-5572 | doi=10.1017/s0025557200178271 | pages=424–436| s2cid=118533002 }}</ref>