By transferring the judgment of convex functions of several variables into the judgment of convex... more By transferring the judgment of convex functions of several variables into the judgment of convex functions of one variable, the authors discuss the convexity of some convex functions of several variables.
By transferring the judgment of convex functions of several variables into the judgment of convex... more By transferring the judgment of convex functions of several variables into the judgment of convex functions of one variable, the authors discuss the convexity of some convex functions of several variables.
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