@article{Xu2026, 
author = {Boyuan Xu and Donghe Pei},
title = {Principal normal surfaces of generalized null Cartan curves in Minkowski 3-space},
year = {2026},
journal = {AIMS Mathematics},
volume = {11},
number = {6},
pages = {15716-15724},
keywords = {principal normal surfaces, generalized null Cartan curves, finite type, singularities},
url = {https://www.sciopen.com/article/10.3934/math.2026646},
doi = {10.3934/math.2026646},
abstract = {We define the principal normal surfaces of generalized null Cartan curves in Minkowski 3-space. We give the necessary and sufficient conditions for the relationship between the singularities of these surfaces and the finite type of their base curves. An analogous result does not hold in Euclidean 3-space, where the singularities of the principal normal surface depend also on the torsion of the base curve.}
}