A First Course in Computational Physics - download pdf or read online

By Paul L. DeVries

I discovered this e-book whilst i used to be looking for an in-depth clarification in regards to the step measurement updating scheme of the RKF45 process. I had noticeable another books (Including Numerical Recipes) yet this one was once the simplest to comprehend. It has many examples, suggestions and methods approximately sensible difficulties. it's definetely a needs to for individuals attracted to numerical methods.The basically draw back of it really is its rate.

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Complexity of the iterative deepening may, at first sight, seem high, since the upper nodes in the tree are searched repeatedly several times. However, in regular game trees, with approximately stable branching factor, the leaves of the tree account for the most of the overall search burden. More precisely, in typical game tree the complexity of the iterative deepening procedure is of the same order as the complexity of its last phase, with d = n. Hence, from the computational complexity viewpoint repeatable searching through the higher nodes is of negligible cost - especially if the average branching factor w is high.

See description within the text for details Knuth and Moore [169] proved that alpha-beta yields the same results as minimax. Actually, the minimax can be implemented as alpha-beta with the infinite initial search window (see fig. 6). A similar note concerning the negamax notation, which was placed in the previous section also applies to implementations of alpha-beta pruning algorithm. A pseudocode of the so-called fail-soft alpha-beta algorithm in negamax convention is presented in fig. 7. 3 Heuristic Enhancements The efficiency of search algorithms depends on the number of nodes that need to be evaluated in the process of estimating the value of the root node s.

Due to memory limitations, the size of transposition table is usually far smaller than the number of all possible moves in all different positions. Hence, at some point collisions in accessing the table may occur. There are generally two types of such collisions: either two different positions generate the same key or two different positions generate different keys, which point to the same element of the table. The latter situation may happen if generated keys exceed the size of the array and after dividing them modulo size of the table the resulting values are equal.

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