This webpage collects some Flash-ActionScript demos that I have developed to introduce people to algebraic topology. You have to install the Macromedia Flash Player to be able to play this animations. It can be downloaded here. I have heard about a problem with FireFox and Macromedia Flash. If your are enabled to play a swf file, download it and play it directly with the Macromedia Flash Player. You can use it wherever you want. If you do, please, send me an . I would like to know where It is used.

Nicolas Delanoue

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Homeomophism

	Description: This three topogical spaces are homeomorphic. One can deform continuously the first one to any others. View : homeomorphisme.html (2 KB) Download :

	Description: The circle and this knot are homeomorphic. This is a simple example used to show that homeomorphism is not only obtained by twistings or stretchings ... View : homeomorphisme_cercle_noeud.html (2 KB) Download :

The fundamental group

	Description: This can be used to show how two functions can be stuck to create a new function. It also provides an example of two functions that are not homotopic. View : homotopy7_nomero1etnumero0.html (2 KB) Download :

	Description: This is an example of a relative homotopy between two functions defined on a circle. View : homotopy_de_cercle.html (2 KB) Download :

	Description: This is an example of a relative homotopy between two functions from the circle. View : homotopy_de_segment.html (2 KB) Download :

	Description: This is an example of a homotopy between a function and the constant function. View : homotopy_nulle.html (2 KB) Download :

	Description: This is an example to show how the resticking of two functions can be homotopic to the constant map. View : homotopy_oppose.html (2 KB) Download :

Topological spaces that are homotopy equivalent :

	Description: An example of a set that is contractible. View : Contractile.swf (2 KB) Download :

	Description: Two sets that are homotopy equivalent and not homeomoprhic. View : ensemble_homotopic.swf (2 KB) Download :