Normal Surface Options

The Surfaces options panel controls how Regina works with lists of normal surfaces.

The settings here are:

Default coordinate system

Specifies which coordinate system will be the default when you enumerate normal surfaces.

Warn before generating non-embedded surfaces

If checked, Regina will ask for confirmation whenever you try to enumerate normal surfaces without selecting embedded surfaces only. Regina asks for confirmation because non-embedded surfaces are typically much slower to generate, far more numerous, and Regina only offers very basic support for them.

Default top-level tab

Specifies which tab in the surface list viewer will first appear when you open a normal surface list for viewing.

Default compatibility matrix

Specifies which matrix (local or global) will first appear when you switch to the surface compatibility tab.

Compatibility matrix threshold

Determines when the surface compatibility matrices will be computed. If the number of normal surfaces is at most the given value, then Regina will compute compatibility matrices automatically. If the number of surfaces is larger, then Regina will not compute these matrices until you manually press the Calculate button.