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Areas of 4. order with 4 circles touching along the plane

Model 127

Areas of 4. order with 4 circles touching along the plane
Category:
A VI 15-20

Description

The surface consists of 4 congruent parts cohering in 6 biplanar double points. The corresponding pairs of tangent planes are imaginary. Gypsum.

Showcase of this model is Case number 9

References

Schilling, Martin(Hrg.): Catalog mathematischer Modelle, Leipzig(Verlag von Martin Schilling) 1911, 7.Auflage, No.99. p. 126.

Fischer, Gerd(Hrg.): Fotoband: Mathematische Modelle / Mathematical Models, mit 132 Fotografien, Braunschweig/Wiesbaden (Vieweg) 1986, picture(s) 41. .

Fischer, Gerd(Hrg.): Mathematical Models, Commentary, Braunschweig/Wiesbaden(Vieweg) 1986. .

Separataband M1 im Mathematischen Institut p. 171.