By Brian Hayes

An Award-Winning Essayist Plies His Craft
 
Brian Hayes is likely one of the so much comprehensive essayists lively today--a declare supported not just via his prolific and carrying on with fine quality output but in addition through such honors because the nationwide journal Award for his commemorative Y2K essay titled "Clock of Ages," released within the November/December 1999 factor of The Sciences magazine. (The also-rans that 12 months incorporated Tom Wolfe, Verlyn Klinkenborg, and Oliver Sacks.) Hayes's paintings during this style has additionally seemed in such anthologies as The Best American journal Writing, the easiest American technological know-how and Nature Writing, and The Norton Reader. right here he deals us a range of his such a lot memorable and available pieces--including "Clock of Ages"--embellishing them with an total, scene-setting preface, reconfigured illustrations, and a refreshingly self-critical "Afterthoughts" part appended to every essay.

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Extra resources for Group Theory in the Bedroom, and Other Mathematical Diversions

Example text

The crucial role of the seed was made clear in the 1980s by Manuel Blum, now of Carnegie Mellon University. He pointed out that a pseudorandom generator does not actually generate any randomness; it stretches or dilutes whatever randomness is present in the seed, spreading it out over a longer series of numbers like a drop of pigment mixed into a gallon of paint. For most purposes, pseudorandom numbers serve perfectly well. Almost all Monte Carlo work is based on them. Even for some cryptographic applications—where standards are higher and unpredictability is everything—Blum and others have invented pseudorandom generators that meet most needs.

The topics included here range from deadly serious (war and peace, wealth and poverty) to utterly frivolous (the mathematics of mattress flipping). Two of the pieces look back to earlier eras when computers were built out of brass gears instead of silicon chips. One essay describes imaginary genetic codes that seem far more elegant (to my taste, anyway) than nature’s own scheme for interpreting DNA. Yet another chapter takes up the surprisingly tricky question of what it means for two things to be equal.

In reciting this history of shifting hazards, I don’t mean to belittle any of them; they are all to be taken seriously. I simply want to point out that when we make an earnest effort to think about “the long run,” our vision of the distant future always seems to reflect mainly the concerns of the present moment. Trying to make life a little better for the great-great- . . great-grandkids is a worthy goal; conversely, policies that cater solely to our own comfort and convenience, ignoring the welfare of future generations, are reprehensible.

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