Recognition Options

While performing recognition, there are several options to choose from. The most basic one is the one called by going to "Recognizer|Recognize". The other options can be called by going to "Recognizer|Recognize In Mode". The presence of these options is due to the fact that the same manifold can be presented in different ways. For example, the manifold (S^2,(2,1),(3,1),(9,1),(1,-1) ) can also be presented as the Dehn filling Q5_43(0,1). Accordingly, the program allows to carry out the recognition in the following modes:

Further options apply to the way the recognition process is carried out. Namely, choosing "Options|Disable Surgeries" will ensure that the recognition process is carried out with surgery moves. But do notice that in this case the recognition process may not be successful, since surgeries are in fact essential. Thus, this mode is best used when your goal is to minimize a spine while keeping it special, rather than to recognize the manifold.

If you go to "Options|Try To Simplify Spine Before Recognizing" (by default this option is disabled), the program first tries to minimize the spine just like it does in the previous case, and only afterwards applies other moves. This is especially useful when a surgery or Heegaard diagram presentation is used.

Output Options

This refers mainly to whether you want to see the list of transformations that the spine underwent during the recognition process. This can be achieved by selecting "Options|Output Move List" prior to making the recognition. Also, using the command "Recognizer|Make Default Moves" will also provide the list of transformations.