get the row of this vertex in the Hessian

* Returns the branching factor of the tree (k) * @return k */

* Returns the depth levels of the tree (L) * @return L */

* Returns the scoring method * @return scoring method */

* Returns the weighting method * @return weighting method */

Bresenham's Line Algorithm Produces a list of tuples from start and end

* return the current time in seconds since 1. Jan 1970 */

* normalize the angle */

how many rows does the block at block-row r has?

* Inverts the a block pattern of A in spinv * @returns false if not defined. */

if external stop flag is given, return its state. False otherwise

the user data associated with this vertex