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The article completes the research of two-point G$^2$ Hermite interpolationproblem with spirals by inversion of conics. A simple algorithm is proposed toconstruct a family of 4th degree rational spirals, matching given G$^2$ Hermitedata. A possibility to reduce the degree to cubic is discussed.

Two-point G$^2$ Hermite interpolation with spirals by inversion of conics: summary