# A p-Laplacian Approximation for Some Mass Optimization by Bouchitte G., Buttazzo G., De Pascale L.

By Bouchitte G., Buttazzo G., De Pascale L.

We convey that the matter of discovering the easiest mass distribution, either in conductivity and elasticity situations, should be approximated by way of recommendations of a p-Laplace equation, as p→+S. This turns out to supply a range criterion whilst the optimum options are nonunique.

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Just as Flatlanders on a sphere could travel the straightest possible line in any direction and everltually return to their starting point, so (Einstein suggested) if a spaceship left the earth and traveled far enough in any one direction, it would eventually return to the earth. If a Flatlander started to paint the surface of the sphere on which he lived, extending the paint outward in ever widening circles, he would reach a halfway point at which the circles would begin to diminish, with himself on the inside, and eventually he would paint himself into a spot.

The clue is provided by the number of matches remaining on the table. There are six possible permutations of the three objects in the pockets of the three spectators. Each permutation leaves a different number of matches on the table. If we designate the objects S , M. and L for small. medium, and large, the chart in Figure 11 shows the permutation that corresponds to each possible remaining number of matches. (Note that it is impossible for four matches to remain. ) Matches Left f , Spectators 2 FIGURE 11 Iic~ for the tlzrcc7-ohjclc-t tric k D o z e ~ ~ofs mnemonic sentences have been devised so that a performer can determine quickly how the three objects are distributed.

Count" is in quotes because you do not actually count them. Instead, merely repeat, "Two matches" each time you move a pair to one side. The pile will consist entirely of pairs, with no extra match left over. "Count" the other pile in the same way. After the last pair has been slid aside a single match will remain. With convincing patter the trick will puzzle most people. Actually it is self-working, and the reader who tries it should easily figure out why. by Claude Gaspar Bachet, published in France in 1612, is still performed by magicians in numerous variants.