A* Search Algorithm - History

History

In 1968 Nils Nilsson suggested a heuristic approach for Shakey the Robot to navigate through a room containing obstacles. This path-finding algorithm, called A1, was a faster version of the then best known formal approach, Dijkstra's algorithm, for finding shortest paths in graphs. Bertram Raphael suggested some significant improvements upon this algorithm, calling the revised version A2. Then Peter E. Hart introduced an argument that established A2, with only minor changes, to be the best possible algorithm for finding shortest paths. Hart, Nilsson and Raphael then jointly developed a proof that the revised A2 algorithm was optimal for finding shortest paths under certain well-defined conditions. They thus named the new algorithm in Kleene star syntax to be the algorithm that starts with A and includes all possible version numbers or A*.

Read more about this topic:  A* Search Algorithm

Famous quotes containing the word history:

    If you look at the 150 years of modern China’s history since the Opium Wars, then you can’t avoid the conclusion that the last 15 years are the best 15 years in China’s modern history.
    J. Stapleton Roy (b. 1935)

    No cause is left but the most ancient of all, the one, in fact, that from the beginning of our history has determined the very existence of politics, the cause of freedom versus tyranny.
    Hannah Arendt (1906–1975)

    In history as in human life, regret does not bring back a lost moment and a thousand years will not recover something lost in a single hour.
    Stefan Zweig (18811942)