Dullo is an algebraic surface of equation x²+y²=(x²+y²+z²)².
**Authors: [Erich Fuchs](https://www.forwiss.uni-passau.de/~fuchs/), [Manfred Kuhnkies](https://www.forwiss.uni-passau.de/de/staff/95/) and [Alexander Zimmermann](http://www.forwiss.uni-passau.de/~zimmerma) from [FORWISS Institute](https://www.forwiss.uni-passau.de/de/projects/64/)**
You can download this model directly from [IMAGINARY](http://imaginary.org/hands-on/twelve-algebraic-sculptures) (no login required)
Dullo's image is part of [Herwig Hauser classic gallery](http://imaginary.org/gallery/herwig-hauser-classic) on Imaginary
![Image of Dullo](http://imaginary.org/sites/default/files/styles/gallery-full/public/dullo%20rtp.jpg "Dullol")