TY - JOUR

T1 - Towards Geometric Integration of Rough Differential Forms

AU - Stepanov, Eugene

AU - Trevisan, Dario

N1 - Stepanov, E., Trevisan, D. Towards Geometric Integration of Rough Differential Forms. J Geom Anal (2020). https://doi.org/10.1007/s12220-020-00375-5

PY - 2021/3

Y1 - 2021/3

N2 - We provide a draft of a theory of geometric integration of “rough differential forms” which are generalizations of classical (smooth) differential forms to similar objects with very low regularity, for instance, involving Hölder continuous functions that may be nowhere differentiable. Borrowing ideas from the theory of rough paths, we show that such a geometric integration can be constructed substituting appropriately differentials with more general asymptotic expansions. This can be seen as the basis of geometric integration similar to that used in geometric measure theory, but without any underlying differentiable structure, thus allowing Lipschitz functions and rectifiable sets to be substituted by far less regular objects (e.g. Hölder functions and their images which may be purely unrectifiable). Our construction includes both the one-dimensional Young integral and multidimensional integrals introduced recently by Züst, and provides also an alternative (and more geometric) view on the standard construction of rough paths. To simplify the exposition, we limit ourselves to integration of rough k-forms with k≤ 2.

AB - We provide a draft of a theory of geometric integration of “rough differential forms” which are generalizations of classical (smooth) differential forms to similar objects with very low regularity, for instance, involving Hölder continuous functions that may be nowhere differentiable. Borrowing ideas from the theory of rough paths, we show that such a geometric integration can be constructed substituting appropriately differentials with more general asymptotic expansions. This can be seen as the basis of geometric integration similar to that used in geometric measure theory, but without any underlying differentiable structure, thus allowing Lipschitz functions and rectifiable sets to be substituted by far less regular objects (e.g. Hölder functions and their images which may be purely unrectifiable). Our construction includes both the one-dimensional Young integral and multidimensional integrals introduced recently by Züst, and provides also an alternative (and more geometric) view on the standard construction of rough paths. To simplify the exposition, we limit ourselves to integration of rough k-forms with k≤ 2.

KW - Exterior differential calculus

KW - Stokes theorem

KW - Young integral

UR - http://www.scopus.com/inward/record.url?scp=85081375305&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/d1d66a48-47b5-3d7d-ac70-c7d4942642f0/

U2 - 10.1007/s12220-020-00375-5

DO - 10.1007/s12220-020-00375-5

M3 - Article

AN - SCOPUS:85081375305

VL - 31

SP - 2766

EP - 2828

JO - Journal of Geometric Analysis

JF - Journal of Geometric Analysis

SN - 1050-6926

IS - 3

ER -