# Fun web toy! Drag the right-hand stick_

Fun web toy! Drag the right-hand stick figure around in a strange world. Try circling the origin.

Originally shared by Arnaud ChéritatA humble JS applet, will be used in a colloquium lecture.

http://www.math.univ-toulouse.fr/~cheritat/StraightSQ/slit-1.html

The classical phenomenon it illustrates can be presented as follows:

It shows two equivalent points of view on some strange world:

left: Stickman lives in a normal world with a portal. Stickman's size is divided by 3 when it passes the portal in one direction, multiplied in the other direction.

right: Stickman lives in a world without portals and where going away and coming back leaves you with your initial size, except if you traveled around the singularity.

The correspondence between the two worlds is given by a holomorphic function: z maps to z to the power alpha, where alpha is a well-chosen complex number.

http://www.math.univ-toulouse.fr/~cheritat/StraightSQ/slit-1.html

The classical phenomenon it illustrates can be presented as follows:

It shows two equivalent points of view on some strange world:

left: Stickman lives in a normal world with a portal. Stickman's size is divided by 3 when it passes the portal in one direction, multiplied in the other direction.

right: Stickman lives in a world without portals and where going away and coming back leaves you with your initial size, except if you traveled around the singularity.

The correspondence between the two worlds is given by a holomorphic function: z maps to z to the power alpha, where alpha is a well-chosen complex number.

A humble JS applet, will be used in a colloquium lecture. http://www.math.univ-toulouse.fr/~cheritat/StraightSQ/slit-1.html The classical phenomenon it illustrates can be presented as follows: It shows two equivalent points of view on some strange world: left: Stickman lives in a normal world with a portal. Stickman's size is divided by 3 when it passes the portal in one direction, multiplied in the other direction. right: Stickman lives in a

Shared with: Public, Arnaud Chéritat

Arnaud Chéritat - 2016-02-04 10:13:39+0000

Thank you for sharing. I deleted the image attached to my post and this deleted the whole post!

Tim Hutton - 2016-02-04 10:33:56+0000

+Arnaud Chéritat I see you made a new post: https://plus.google.com/104596608158258376339/posts/CEATiAxAMHk

Arnaud Chéritat - 2016-02-04 21:23:28+0000

Indeed, I added a second character, making the point more clear (I hope).

*This post was originally on Google+*