In geometry, **Dini's surface** is a surface with constant negative curvature that can be created by twisting a pseudosphere.^{[1]} It is named after Ulisse Dini^{[2]} and described by the following parametric equations:^{[3]}

Another description is a helicoid constructed from the tractrix.^{[4]}

## See also

## References

**^**"Wolfram Mathworld: Dini's Surface". Retrieved 2009-11-12. CS1 maint: discouraged parameter (link)**^**J J O'Connor and E F Robertson (2000). "Ulisse Dini Biography". School of Mathematics and Statistics, University of St Andrews, Scotland. Archived from the original on 2012-06-09. Retrieved 2016-04-12. CS1 maint: discouraged parameter (link)**^**"Knol: Dini's Surface (geometry)". Archived from the original on 2011-07-23. Retrieved 2009-11-12. CS1 maint: discouraged parameter (link)**^**Rogers and Schief (2002).*Bäcklund and Darboux transformations: geometry and modern applications in Soliton Theory*. Cambridge University Press. pp. 35–36.