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If a number is normal , digit sequences of the same length occur with the same frequency . " I do n't know any details , but I think it 's exciting to be in the first state to make a statement about preventing the infection shown to cause cancer . The researchers expressed their model in terms of a differential equation involving damped harmonic oscillators . Both documents are reprinted in Opera Omnia , a massive edition of Euler 's collected papers . Eventually , this research could lead to computers that operate within the human body . One survey of five stores , for example , reported the introduction of 129 ice-cream products and the removal of 118 items from this category during a recent 2-year period . " We need to be in front of this to maintain consumer confidence , " said Tom Stenzel , president of the United Fresh Produce Association , a leading trade group . To reinforce his point , Tolstoy then refers to the ancient story of Achilles and the tortoise . Computer simulations also suggest that at moderate traffic volumes when vehicle flow should be relatively stable , a single car moving at randomly fluctuating speeds within a steady stream of traffic along a single lane can by itself create waves of congestion that propagate down the road behind it . After it performs its assigned task on a given cell , the machine stops or else moves one cell to the left or right . It 's often easier to take painful steps such as cutting benefit programs or raising taxes when the government is split between the two parties . It was difficult to avoid being influenced by whomever happened to be in the lead at any given moment . The scientist who pioneered the ideas responsible for this development is Manfred R. Schroeder of the University of G & 0uml ; ttingen in Germany . Instead of focusing on what happens in an equilateral triangle with all three dogs moving at the same speed , he looked at a more general case involving triangles that are not equilateral . A constant would be considered normal to base 10 if any single digit in its decimal expansion appears one-tenth of the time , any two-digit combination one-hundredth of the time , any three-digit combination one-thousandth of the time , and so on . A copy of the manuscript that Euler handed in to Bernoulli is in the Euler archives in Moscow and a paper based on the homework was published in the journal Commentarii academiae scientiarum Petropollitanae in 1728 . Congress has rejected both four years in a row . Until reflection phase gratings came along , there really were no surfaces designed to spread sound around in both space and time . The number of " free riders " also grows while the most productive agents begin to leave . In this case , however , the curvature of the outer circle is negative , because the other circles touch it from the inside rather than the outside . Pictures also make a difference . The same typewriter can produce any novel that has ever been written or ever will be written . He said there are many times that investigators from both offices have interviewed employees without attorneys present and that the general counsel 's office is involved only when sensitive information is discussed . " Rainbow Ramsey theory is a new area of mathematics , and further work on any of these conjectures and formulating additional conjectures is encouraged .