By Ilan Vardi

ISBN-10: 0201529890

ISBN-13: 9780201529890

Offers a few universal difficulties in arithmetic and the way they are often investigated utilizing the Mathematica machine procedure. difficulties and workouts contain the calendar, sequences, the n-Queens difficulties, electronic computing, blackjack and computing pi. This ebook is for those who wish to see how Mathematica is utilized to real-world arithmetic.

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**Extra resources for Computational recreations in Mathematica**

**Sample text**

10) with P ´ y and Q ´ ¡2 ° y ¡ ® x ¡ ¯ x3 + F cos(! t). 12) After a transient time interval, the Du±ng system can, not unexpectedly, display a periodic oscillation in response to the periodic driving term. A more surprising result is that it can exhibit highly irregular, or chaotic, oscillatory motion that is essentially unpredictable, even though the Du±ng equation is deterministic. In contrast to the periodic regime, there is an extreme sensitivity to initial conditions in the chaotic domain.

Problem 1-12: Varying frequency With all other parameters the same as in the text, but with F = 0:42, study the response of the inverted Du±ng system as ! is varied over the range between zero and one. Interpret the results in each case. Problem 1-13: Varying the damping coe±cient With all other parameters the same as in the text, investigate the e®ect on the four graphs when the damping coe±cient is reduced to ° = 0:125. Identify the period response for each F value. Repeat with ° = 0:0625. Problem 1-14: Varying the force law Execute the text recipe with the x3 term in the force law replaced with x5 and discuss how this change a®ects the results.

To gain a preliminary understanding of what motions are possible, Jennifer decides to derive the potential energy function V (x) and plot it. This may be accomplished by entering the anharmonic (nonlinear) restoring force f = ¡® x ¡ ¯ x3 , > f:=-alpha*x-beta*x^3; #anharmonic restoring force f := x ¡ x3 R and performing the inde¯nite integral V = ¡ f dx using the int command. 12: Double-well potential for an inverted-spring Du±ng equation. 2. 12. The potential is commonly referred to as the double-well potential.

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