Geodesic
Curves in Banach spaces which allow a $C^{1,\rm BV}$ parametrization or a parametrization with finite convexity
Czechoslovak Mathematical Journal, Tome 63 (2013) no. 4, pp. 1057-1085 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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We give a complete characterization of those $f\colon [0,1] \to X$ (where $X$ is a Banach space) which allow an equivalent $C^{1,\rm BV}$ parametrization (i.e., a $C^1$ parametrization whose derivative has bounded variation) or a parametrization with bounded convexity. Our results are new also for $X= \mathbb R^n$. We present examples which show applicability of our characterizations. For example, we show that the $C^{1,\rm BV}$ and $C^2$ parametrization problems are equivalent for $X=\mathbb R$ but are not equivalent for $X = \mathbb R^2$.
We give a complete characterization of those $f\colon [0,1] \to X$ (where $X$ is a Banach space) which allow an equivalent $C^{1,\rm BV}$ parametrization (i.e., a $C^1$ parametrization whose derivative has bounded variation) or a parametrization with bounded convexity. Our results are new also for $X= \mathbb R^n$. We present examples which show applicability of our characterizations. For example, we show that the $C^{1,\rm BV}$ and $C^2$ parametrization problems are equivalent for $X=\mathbb R$ but are not equivalent for $X = \mathbb R^2$.
DOI : 10.1007/s10587-013-0072-7
Classification : 26A51, 26E20, 53A04
Keywords: curve in Banach spaces; $C^{1, \rm BV}$ parametrization; parametrization with bounded convexity 
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     title = {Curves in {Banach} spaces which allow a $C^{1,\rm BV}$ parametrization or a parametrization with finite convexity},
     journal = {Czechoslovak Mathematical Journal},
     pages = {1057--1085},
     year = {2013},
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     doi = {10.1007/s10587-013-0072-7},
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Duda, Jakub; Zajíček, Luděk. Curves in Banach spaces which allow a $C^{1,\rm BV}$ parametrization or a parametrization with finite convexity. Czechoslovak Mathematical Journal, Tome 63 (2013) no. 4, pp. 1057-1085. doi: 10.1007/s10587-013-0072-7

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