To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

How to transfigure the Wikipedia

Would you like Wikipedia to always look as professional and up-to-date? We have created a browser extension. It will enhance any encyclopedic page you visit with the magic of the WIKI 2 technology.

Try it — you can delete it anytime.

Install in 5 seconds

Yep, but later

4,5

Kelly Slayton

Congratulations on this excellent venture… what a great idea!

Alexander Grigorievskiy

I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.

Live Statistics

English Articles

Improved in 24 Hours

Added in 24 Hours

What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.

Great Wikipedia has got greater.

.

Leo

Newton

Brights

Milds

Dini's surface

From Wikipedia, the free encyclopedia

Dini's surface plotted with adjustable parameters by Wolfram Mathematica program

Dini's Surface with constants a = 1, b = 0.5 and 0 ≤ u ≤ 4 $π$ and 0<v<1.

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]

{\begin{aligned}x&=a\cos u\sin v\\y&=a\sin u\sin v\\z&=a\left(\cos v+\ln \tan {\frac {v}{2}}\right)+bu\end{aligned}}

Dini's surface with 0 ≤ u ≤ 4 $π$ and 0.01 ≤ v ≤ 1 and constants a = 1.0 and b = 0.2.

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

YouTube Encyclopedic

1/2
Views:
343
1 035

Transcription

See also

Breather surface

References

^ "Wolfram Mathworld: Dini's Surface". Retrieved 2009-11-12.
^ 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.
^ "Knol: Dini's Surface (geometry)". Archived from the original on 2011-07-23. Retrieved 2009-11-12.
^ Rogers and Schief (2002). Bäcklund and Darboux transformations: geometry and modern applications in Soliton Theory. Cambridge University Press. pp. 35–36.

This page was last edited on 29 January 2023, at 01:53

Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.

Terms of Service

Wikipedia Makes No Guarantee of Validity