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Are you Alfred Gray, author of the books below?
Introduction to Ordinary Differential Equations with Mathematica by Alfred Gray Modern Differential Geometry of Curves and Surfaces with Math... by Elsa Abbena Tubes by Alfred Gray Modern Differential Geometry of Curves and Surfaces by Alfred Gray Introduction to Ordinary Differential Equations with Mathemat... by Alfred Gray Differentialgeometrie by Alfred Gray Ordinary Differential Equations with Mathematica with Disk by Alfred Gray Mathematica 曲線と曲面の微分幾何 by Alfred Gray Millionaire Elite Security Protection by Alfred Gray Curves And Surfaces by Alfred Gray


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