Geometric Inverse Problems- With Emphasis on Two Dimensions（Gabriel P. Paternain, Mikko Salo, Gunther Uhlmann） Geometric Inverse Problems- With Emphasis on Two Dimensions（Gabriel P. Paternain, Mikko Salo, Gunther Uhlmann）Geometric Inverse Problems- With Emphasis on Two Dimensions（Gabriel P. Paternain, Mikko Salo, Gunther Uhlmann）Geometric Inverse Problems- With Emphasis on Two Dimensions（Gabriel P. Paternain, Mikko Salo, Gunther Uhlmann）