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December 2005

Newer Math?

Continued from page 1

By Rodney Brooks

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These are just a few examples of what are sometimes referred to as complex adaptive systems. They have many interacting parts that change in response to local inputs and as a result change the global behavior of the complete system. The relatively smooth operation of biological systems -- and even our human-constructed Internet -- is in some ways mysterious. Individual parts clearly do not have an understanding of how other individual parts are going to change their behavior. Nevertheless, the ensemble ends up working.

We need a new mathematics to help us explain and predict the behavior of these sorts of systems. In my own field, we want to understand the brain so we can build more intelligent robots. We have primitive models of what individual neurons do, but we get stuck using the tools of information theory in trying to understand the "information content" that is passed between neurons in the timing of voltage spikes. We try to impose a computer metaphor on a system that was not intelligently designed in that way but evolved from simpler systems.

My guess is that a new mathematics for complex adaptive systems will emerge, one that is perhaps no more difficult to understand than topology or group theory or differential calculus and that will let us answer essential questions about living cells, brains, and computer networks.

We haven't had any new household names in mathematics for a while, but whoever figures out the structure of this new mathematics will become an intellectual darling -- and may actually succeed in designing a computer that comes close to mimicking the brain.

Rodney Brooks directs MIT's Computer Science and Artificial Intelligence Laboratory.

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Comments

  • Hypercomplex Numbers
    Guest (Thomas Jewitt) on 12/30/2005 at 5:48 PM
    Posts:
    1
    Hypercomplex numbers are a candicate for the &quotnew mathematics&quot whereby  elements of a vector correspond to multiple objects or data sources, each element of a vector a multi-dimensional quantity representing the different types of information originating from a single source.  If the number system is associative-commutative then it is possible to manipulate hypercomplex numbers using the same binary and unary operators that apply to complex numbers -  Gauss-Jordan elimination applies, and it is possible to factor and invert matrices of hypercomplex numbers in order to solve many types of inverse, least-squares, and optimization problems. 

    I have used this type of mathematical system to uncover patterns of variation that result from relationships between data sources and that are transparent to mathematical models using the algebraic system that we use to balance our checkbooks (real numbers).
    Rate this comment: 12345
    • New mathematics
      Guest (R. Narayanan) on 01/12/2006 at 12:00 AM
      Posts:
      1
      The idea is impressive. Apart from trying to understand biological systems (working of the brain), the "new maths" should help understand, model and predict societal systems - politics, economics, family,business etc. It would have, I guess,  "relations" as atomic units instead of "objects" or any hitherto known "number systems". It would enable manipulate relationships to produce "emergent" properties arising out of the interplay of relations. Such maths should help decision makers redesign societal systems for any given context.
      Rate this comment: 12345
    • He's asking for NKS
      Guest (Fred Meinberg) on 01/20/2006 at 12:00 AM
      Posts:
      1
      There is an approach that pretty much fits Brooks' description of what he is looking for: Stephen Wolfram's NKS. The study of simple algorithms - which are capable of generating unbounded complexity - will sooner or later have the same status as current Mathematics.
      Rate this comment: 12345
      • Not NKS
        Guest (T Heywood) on 01/31/2006 at 12:00 AM
        Posts:
        1
        NKS is descriptive. Brooks is talking about a useful, predictive mathematics of systems.
        Rate this comment: 12345
        • no corporate boosterism
          Guest (Edward Lau) on 03/24/2006 at 12:00 AM
          Posts:
          1
          Yes, absolutely.
          Mr Meinberg, this is not a place for corporate boosterism. If your ideas were only profound enough
          Rate this comment: 12345
      • NKS
        Guest (K Brown) on 02/23/2006 at 12:00 AM
        Posts:
        1
        I browsed through NKS and conclude that what is stated is not new and what is interesting is not original.
        Rate this comment: 12345
  • Hypercomplex Numbers
    Guest (Thomas Jewitt) on 12/30/2005 at 5:48 PM
    Posts:
    1
    Hypercomplex numbers are a candicate for the &quotnew mathematics&quot whereby  elements of a vector correspond to multiple objects or data sources, each element of a vector a multi-dimensional quantity representing the different types of information originating from a single source.  If the number system is associative-commutative then it is possible to manipulate hypercomplex numbers using the same binary and unary operators that apply to complex numbers -  Gauss-Jordan elimination applies, and it is possible to factor and invert matrices of hypercomplex numbers in order to solve many types of inverse, least-squares, and optimization problems. 

    I have used this type of mathematical system to uncover patterns of variation that result from relationships between data sources and that are transparent to mathematical models using the algebraic system that we use to balance our checkbooks (real numbers).
    Rate this comment: 12345
  • Precursor
    Guest (Lee Smith) on 03/08/2006 at 12:00 AM
    Posts:
    1
    Teaching systems thinking, which we already know much about, should be a precursor/prerequisite for a math intended to help us deal with complex adaptive systems.
    Rate this comment: 12345
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