6.The problems on the compatibility of the Gauss-markoff model in broadsense are discussd,and the concept of compatibility of the model in broadsense is clarified.
7.Bertrand curves with broadsense can be regarded as the equidistants of special line, which form the family of Bertrand curve with broadsense, and be convenient to the choice.
10.Fund fund has the branch of broadsense and narrow sense, say from broadsense, fund is a general designation of orgnaization investor, include fiducial investment fund, unit fund of fiducial fund, accumulation fund, insurance, emeritus fund, the fund of all sorts of foundation.