5 papers
A solution to Banach conjecture
Ning Zhang
In this paper, we begin by constructing global linear maps on (n-2)-dimensional subspaces, derived from the local continuity of linear transformations among central sections of a c…
A representation of range decreasing group homomorphisms
Ning Zhang, Lifan Liu
The method of range decreasing group homomorphisms was first introduced in \cite{z23} and later generalized in \cite{z25}. This approach has proved effective for analyzing a broad…
Range decreasing group homomorphisms and weighted composition operators
Ning Zhang
We present necessary and sufficient conditions for a group homomorphism between spaces of smooth sections of Lie group bundles to be a weighted composition operator. These results…
The Minkowski problem for the non-compact convex set with an asymptotic boundary condition
Ning Zhang
In this paper, combining the covolume, we study the Minkowski theory for the non-compact convex set with an asymptotic boundary condition. In particular, the mixed covolume of two…
Holomorphic sections of line bundles on the jet spaces of the Riemann sphere
Xiaokun Wang, Ning Zhang
Fix a point in the circle . The space of -jets at of maps from to the Riemann sphere is a dimen…