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math.AP2018
Asymptotic observability identity for the heat equation in R^d
Gengsheng Wang, Ming Wang, Yubiao Zhang
We build up an asymptotic observability identity for the heat equation in the whole space. It says that one can approximately recover a solution, through observing it over some cou…
math.AP2018
New lower bounds on the radius of spatial analyticity for the KdV equation
Jianhua Huang, Ming Wang
The radius of spatial analyticity for solutions of the KdV equation is studied. It is shown that the analyticity radius does not decay faster than as time goes to in…