connected_sum

” Two knots (or links or planar diagrams) can be summed by placing them side by side and joining them by straight bars so that orientation is preserved in the sum. The knot sum is also known as composition (Adams 1994) or connected sum (Rolfsen 1976, p. 40).

Functions

is_connected_sum(g)	Determine if the given planar diagram represents a connected sum.
is_connected_sum_third_order(g)	Return True if g is a 3rd order connected sum diagram and False otherwise.
split_connected_sum(k)	Return a list of connected sum components.