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    <title>Notebooks   </title>
    <link>http://bactra.org/notebooks</link>
    <description>Cosma's Notebooks</description>
    <language>en</language>

  <item>
    <title>John von Neumann (1903--1957)</title>
    <link>http://bactra.org/notebooks/1997/05/06#von-neumann</link>
    <description>

Johnny, as it seems everyone called him, was one of those people who are so
bright it's hard to believe they were human.  (Maybe he wasn't.  There's an old
joke about the Fermi Paradox, a problem which occured to Enrico Fermi one day
at Los Alamos: where are They?  If there are intelligent aliens out there in
the universe, why aren't they here yet?  A million years is nothing, as the
universe reckons things, but, judging from our own track-record, a species only
that much older than us would have technology which would blow our minds,
pretty close to limits set by physical laws.  Leo Szilard is supposed to have
answered Fermi: ``Maybe they're already here, and you just call them
Hungarians.'')  About the only large current of the natural sciences in this
century which von Neumann's work has &lt;em&gt;not&lt;/em&gt; added to is molecular
biology.  Almost everything else of any signficance he touched: &lt;a
href=&quot;mathematical-logic.html&quot;&gt;mathematical logic&lt;/a&gt;; pure &lt;a
href=&quot;math.html&quot;&gt;math&lt;/a&gt;; quantum &lt;a href=&quot;physics.html&quot;&gt;physics&lt;/a&gt;; &lt;a
href=&quot;computers.html&quot;&gt;computing&lt;/a&gt; (which, as we know it, is largely his
invention), &lt;a href=&quot;cybernetics.html&quot;&gt;cybernetics&lt;/a&gt; and automata theory;
the &lt;a href=&quot;manhattan-project.html&quot;&gt;Bomb&lt;/a&gt;; &lt;a
href=&quot;turbulence.html&quot;&gt;turbulence&lt;/a&gt;; game theory (another invention) and
so &lt;a href=&quot;economics.html&quot;&gt;economics&lt;/a&gt;, &lt;a
href=&quot;evolution.html&quot;&gt;evolutionary biology&lt;/a&gt;, and the theory of &lt;a
href=&quot;war.html&quot;&gt;war&lt;/a&gt; and conflict; &lt;a href=&quot;alife.html&quot;&gt;artificial
life&lt;/a&gt;, &lt;a href=&quot;cellular-automata.html&quot;&gt;cellular automata&lt;/a&gt; (a third
invention), the theory of self-reproduction (which, with molecular biology,
finally killed off any last lingering hopes for vitalism) and &lt;a
href=&quot;darwin-machines.html&quot;&gt;artificial evolution&lt;/a&gt;.  What many of us like to
think of as new and profound changes in the way science works, brought about by
computer &lt;a href=&quot;simulations.html&quot;&gt;modelling and simulation&lt;/a&gt;, were forseen
and called for by von Neumman in the '40s.  If any one person can be said to be
the intellectual ancestor of &lt;a href=&quot;complexity.html&quot;&gt;complexity&lt;/a&gt; and all
that travels alongside it, it was Johnny.  His only real rival for the honor
is &lt;a href=&quot;wiener.html&quot;&gt;Norbert Wiener&lt;/a&gt;, a better man but a less
overwhelming scientist.

&lt;ul&gt;Recommended:
	&lt;li&gt;&lt;a href=&quot;http://users.aol.com/bigsecrets/&quot;&gt;William
Poundstone&lt;/a&gt;, &lt;cite&gt;The Recursive Universe&lt;/cite&gt; [about cellular automata,
mechanical self-reproduction, etc.] and &lt;cite&gt;Prisoner's Dilemma&lt;/cite&gt; [A
combination biography of Johnny, history of the Bomb and the early Cold War,
and a history and presentation of game theory]
	&lt;li&gt;&lt;a href=&quot;http://www.krl.caltech.edu/~charles/alife-game/&quot;&gt;Project:
Von Neumann&lt;/a&gt; [A freeware game collaboration, with evolving enemies.]
	&lt;li&gt;&lt;a href=&quot;http://lslwww.epfl.ch/neumann&quot;&gt;von Neumann Day,&lt;/a&gt; on 25
July, the 40th anniversary of his death, at the &lt;a
href=&quot;http://lslwww.epfl.ch/&quot;&gt;Logic Systems Laboratory of the Swiss Federal
Institute of Technology in Lausanne&lt;/a&gt;.  [I &lt;em&gt;like&lt;/em&gt; the idea of having a
von Neumann Day.]
	&lt;li&gt;by Johnny himself:
		&lt;ul&gt;
		&lt;li&gt;&lt;cite&gt;The Computer and the Brain&lt;/cite&gt;
		&lt;li&gt;&lt;cite&gt;Theory of Self-Reproducing Automata,&lt;/cite&gt;
ed. Arthur Burks, especially the first part, on the general theory of automata
		&lt;li&gt;``Recent Theories of Turbulence'' in &lt;cite&gt;Collected
Works,&lt;/cite&gt; vol. 6
		&lt;/ul&gt;
	&lt;/ul&gt;

&lt;ul&gt;To read:
	&lt;li&gt;William Aspray, &lt;cite&gt;John von Neumann and the Origins of Modern
Computing&lt;/cite&gt;
	&lt;li&gt;Heims, &lt;cite&gt;John Von Neumann and Norbert Wiener&lt;/cite&gt;
	&lt;li&gt;Salim Rashid, &quot;John von Neumann and Scientific Method&quot;,
&lt;cite&gt;Journal of the History of Ideas&lt;/cite&gt; &lt;strong&gt;68&lt;/strong&gt; (2007):
501--527
[&lt;a
href=&quot;http://muse.jhu.edu/journals/journal_of_the_history_of_ideas/toc/jhi68.3.html&quot;&gt;Abstract,
links&lt;/a&gt; near bottom of page]
	&lt;li&gt;von Neumann and Oskar Morgenstern, &lt;cite&gt;The Theory of Games and
Economic Behavior&lt;/cite&gt;
	&lt;/ul&gt;
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