topology

Functions

bridges(k)	Return the set of bridges in the planar diagram.
edges(k, **endpoint_attributes)	Return a list of ordered edges/strands of a knotted graph or a knot, or link.
is_bridge(k, arc_or_endpoint)	Determine whether the given arc or endpoint is a bridge in the planar diagram.
is_empty_diagram(k)
is_kink(k, endpoint)	Determines whether an endpoint forms a kink in the planar diagram.
is_knot(k)	Determines whether the given planar diagram represents a knot.
is_knotoid(k)	Is the diagram a (multi) knotoid?
is_leaf(k, node)	Is the node a leaf?
is_linkoid(k)	Is the diagram a multi-linkoid?
is_loop(k, arc_or_endpoint)	Determine whether the given arc or endpoint forms a loop in the planar diagram.
is_planar_graph(k)	Determines whether the given planar diagram represents a planar graph.
is_unknot(k)
kink_region_iterator(k[, of_node])	An iterator (generator) over regions of kinks/loops.
kinks(k[, crossing])	Returns the set of kinks in the planar diagram.
leafs(k)	Returns the leafs of a planar diagram.
loops(k)	Returns a set of arcs that form loops in the planar diagram.