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math.CO2023
A new definition of upward planar order
Ting Li, Xuexing Lu
We give a more coherent definition of upward planar order.
math.RA2023
On the g-Hirano invertibility in Banach algebras
Honglin Zou, Tingting Li, Yujie Wei
In a Banach algebra, we introduce a new type of generalized inverse called g-Hirano inverse. Firstly, several existence criteria and the equivalent definition of this inverse ar…