MathGroup Archive 1994

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MathSource Gopher, FTP, What's New

The new year brings many changes to MathSource, including the
availability of a Gopher server; a new organizational scheme
for FTP and Gopher access; self-extracting archives for email
users; and more.

For general information about MathSource, send an email
message containing the line "Help Intro" (no quotes) to the
MathSource server at mathsource at

New FTP Organization
Foremost is the implementation of a new categorization
hierarchy for the MathSource FTP and Gopher sites.  This new
organization makes it easier to find the MathSource items you
are looking for.  Related MathSource items are also grouped
more closely than before.  A brief outline of the new
organization is given below.  For more information, see the
file /pub/README on the MathSource FTP site
( [IP#]).

The MathSource directory organization begins with five
category choices on the top level:  General, Enhancements,
Applications, Publications, and NumberedItems.

General:  contains item of general interest to the Mathematica
community, (i.e., archives, demos, administrative
information, etc.) along with system-specific utilities,
tools, and tips.

Enhancements: contains items that are enhancements to the
Mathematica system.  They enhance the functionality of
Mathematica beyond the basic kernel.

Applications: deals with the application of Mathematica to
specific problems and subject areas.

Publications: includes books, journals, periodicals, press
announcements, Mathematica documentation,
bibliographical information, technical reports, and notes.

NumberedItems:  If you know the specific item number of the
material you're interested in, you can get it here without
moving through multiple directory levels.

Each of these categories is further divided into several
sub-categories, which are fairly descriptive and
self-explanatory.  At the lowest level of each directory,
MathSource items are identified by their item-numbers.  An
index file (00-Index) in each directory lists the contents of
that directory along with the item title.  For more
information, a .README file exists for each item providing
detailed information about the file sizes and contents for
each individual item.  At the top level, the file maplist
provides a mapping of the MathSource item numbers and their
corresponding directory locations.

MathSource Gopher
The MathSource Gopher server has been receiving a tremendous
response since its initial announcement.  The MathSource
Gopher server allows users to access all material available to
FTP and Email users and conduct a full-text search of the
MathSource contents.  Additionally, MathSource Gopher users
enjoy links to other Mathematica FTP and Gopher sites around
the world.  To take advantage of this service, point your Gopher
at, port 70. 

Self-extracting Archives
Email users will soon enjoy the ease of self-extracting
archives from MathSource.  These new methods will result in
fewer messages being sent in response to a given request, and an
easier extraction process once the files are received.  This
feature is currently being beta-tested and is expected to go
on-line in March.  

New Items in MathSource

The following items have been updated or added to the
MathSource collection since December 15, 1993. 

0205-366: Applied Mathematica: Getting Started, Getting It Done (January 11,
          Authors: William Shaw and Jason Tigg
          This material contains the longer code sections from Applied
          Mathematica, by William T. Shaw and Jason Tigg, published by
          Addison-Wesley in December 1993.  This book shows how Mathematica
          can be used to solve problems in the applied sciences.  The code
          includes specialized graphics; several MathLink examples, 
          including C code and template files; and some extended data
          analysis examples.

          0011: Author's comments (January 7, 1994; 5 kilobytes)

          0022: Visualizing Data in Two Dimensions (January 7,
                 1994; 127 kilobytes)

          0033: Exporting Results from Mathematica (January 7,
                 1994; 15 kilobytes)

          0044: Increased Efficiency (January 7, 1994; 7

          0055: Robust Regression: An Application of Mathematica
                 to Data Analysis (January 7, 1994; 56 kilobytes)

          0066: Time Series Analysis (January 7, 1994; 863

          0077: Probabilistic System Assessment (January 7, 1994;
                 58 kilobytes)

          0088: Visualization of the Mandelbrot Set (January 7,
                 1994; 39 kilobytes)

0205-838: Customizing Mathematica with init.m (January 5, 1994)
          Author: Robby Villegas
          This notebook expands on the MathUser article "Customizing
          Mathematica with init.m" (MathUser #5, Winter 93-94) It shows how
          Macintosh and Windows Mathematica users can set up customized
          initialization files.

          0011: Mathematica notebook (January 5, 1993;
                 19 kilobytes)

0206-019: The Limits of Mathematics --- Course Outline and Software 
          (December 29, 1993)
          Author: Gregory J. Chaitin
          A remarkable new definition of a self-delimiting universal Turing
          machine is presented that is easy to program and runs very 
          quickly.  This provides a new foundation for algorithmic
          information theory.  This new universal Turing machine is
          implemented via software written in Mathematica and C. Using this
          new software, it is now possible to give a self-contained "hands
          on" mini-course presenting very concretely the latest proofs of 
          the fundamental information-theoretic incompleteness theorems.

          0011:  README.tex User's guide TeX form (102 kilobytes)

          0022: Users' guide PostScript form (346 kilobytes)

          0033:  univ.lisp (3 kilobytes)

          0044:  omega.lisp (2 kilobytes)

          0055:  omega2.lisp (1 kilobyte)

          0066:  omega3.lisp (1 kilobyte)

          0077:  omega4.lisp  (3 kilobytes)

          0088:  sets0.lisp  (1 kilobyte)

          0099:  sets1.lisp  (2 kilobytes)

          0101:  sets2.lisp  (2 kilobytes)

          0112:  sets3.lisp  (2 kilobytes)

          0123:  sets4.lisp  (2 kilobytes)

          0134:  godel.lisp  (2 kilobytes)

          0145:  godel2.lisp  (2 kilobytes)

          0156:  godel3.lisp  (3 kilobytes)

          0167:  slisp.m  (4 kilobytes)

          0178:  lisp.m  (3 kilobytes)

          0189:  lispm.m  (3 kilobytes)

          0190:  clisp.m  (1 kilobyte)

          0202:  xclisp.m  (1 kilobyte)

          0213:  clispm.m  (1 kilobyte)

          0224:  frontend.m  (3 kilobytes)

          0235:  xpnd.m  (2 kilobytes)

          0246:  rm2c.m  (4 kilobytes)

          0257:  eq.m  (8 kilobytes)

          0268:  lisp.c  (8 kilobytes)

          0279:  lisp.rm  (15 kilobytes)

0206-031: Linear Lattice-Ligand Binding Notebooks (January 11, 1994)
          Author: Alan R. Wolfe
          These Mathematica notebooks calculate and plot data for the 
          binding of ligands to an infinite linear lattice.  Binding site
          overlap and cooperative interactions between adjacent bound 
          ligands are taken into account.  This is a mathematical model for
          non-sequence-selective binding of proteins and other small
          molecules (ligands) to a linear macromolecule such as DNA (the
          lattice).  The method used is based on the treatment given in
          Wolfe, A. R. & Meehan, T. (1992) J. Mol. Biol. 223, 1063-1087.

          0011:  README.txt Plain-text documentation for all notebooks
                 (January 7, 1994; 10 kilobytes)

          0022: (January 7, 1994; 13 kilobytes)

          0033: (December 31, 1993; 16 kilobytes)

          0044: (December 31, 1993; 6 kilobytes)

          0055: (December 31, 1993; 7 kilobytes)

          0066: (December 31, 1993; 39 kilobytes)

          0077: (December 31, 1993; 12 kilobytes)

          0088: (December 31, 1993; 38 kilobytes)

          0099: (December 31, 1993; 12 kilobytes)

          0101: (December 31, 1993; 98 kilobytes)

          0112: (December 31, 1993; 14 kilobytes)

0203-207: Literature Survey of Mathematica (January 7, 1994)
          Author: Brian L. Evans
          A partial index of articles relating to or citing Mathematica. 
          Compiled by Brian Evans of the Georgia Institute of Technology,
          this  reference covers many areas of interest from artificial
          intelligence to geophysics to symbolic mathematics.

          0011:  LitSurvey.txt Plain text survey file  (January 7, 1994; 61

          0022: Mathematica notebook survey file (January 7,
                 1994; 77 kilobytes)

0205-995: MathBook for RS/6000 Platforms (January 4, 1994)
          Author: Wolfram Research
          MathBook is a utility for viewing online the appendix from
          "Mathematica: A System for doing Mathematica By Computer". It will
          work with RS/6000 systems running AIX 3.2 or higher.

          0011:  README.txt Installation instructions (December 21, 1993; 1

          0022:  mathbook.M RS/6000 executable (January 4, 1994; 6197

0205-298: Nixpub: Public Access Unix Site Listings (January 7, 1994)
          Author: Phil Eschallier
          These files contain a list of 142 public-access Unix sites across
          the country.  The lists are sorted according to area-code and
          contain specific features and service information for each site. 
          Note: The files Nixpub.short and Nixpub.long contain a list of
          public-access Unix sites that Wolfram Research believes that you
          may use for the purpose of gaining access to MathSource.  Wolfram
          Research has no involvement in the operation of these sites and
          does not make any recommendations with regards to their use.

          0011:  Nixpub.short abbreviated listing (January 4, 1994; 15

          0022:  Nixpub.long long, detailed listing (January 4, 1994; 66

0206-020: Pseudo-Random Pulse Sequencing (January 4, 1994)
          Author: Erik Jensen
          The package PseudoRandom.m defines a few routines that are useful
          for working with pseudorandom sequences.  These sequences (also
          called Maximum Length PseudoRandon Sequences or MLPRS's) have been
          used in optimizing time-of-flight spectroscopies in the physical
          sciences (neutron beam and molecular beam scattering). 

          0011:  PseudoRandom.m Mathematica package (December 1, 1993; 9

          0022: Mathematica notebook (December 1, 1993; 
                 18 kilobytes)

0206-008: Solution to a System of Ordinary Differential Equations with 
          Mixed, Algebraic, Boundary Conditions (December 29, 1993)
          Author: Richard C. Miller
          This notebook illustrates the solution of four simultaneous
          ordinary differential equations with three constant initial
          boundary conditions and one algebraic final boundary condition.
          Forward shooting was used to solve the linear system.  The example
          provided illustrates the temperature profile of an infinitely long
          cylindrical reactor where the internal reaction is temperature

          0011: Mathematica notebook (December 29,
                 1993; 173 kilobytes)

0206-042: The Stellated Icosahedra (January 7, 1994)
          Author: Roman E. Maeder
          The enumeration of all stellations of the icosahedron was
          accomplished in 1938. The geometric constructions and 
          combinatorial algorithms used can easily be programmed in
          Mathematica. Its symbolic and graphic capabilities make it well
          suited to render the solids in a variety of formats. Icosahedra.m
          is a package for rendering all 59 stellations of the icosahedron. 
          Some examples for its use are in the notebook

          0011:  README.txt Abstract and references (January 7, 1994; 1

          0022:  Icosahedra.m Stellated Icosahedra package (January 7, 1994;
                 12 kilobytes)

          0033: Sample notebook (January 7, 1994; 11 

0204-848: Tools of Tensor Calculus (January 4, 1994)
          Authors: X. Jaen and E. Llanta
          The TTC package implements some of the basic tools of tensor
          calculus in a differentiable manifold. One works with the full
          expression of tensors expressed in terms of their components on 
          any coordinate basis. This structure permits to define all
          operators in an intrinsic way.

          A tool for changing the coordinates of any tensor is provided. 
          This change of basis mechanism allows the simultaneous use, during
          the same session, of the different expressions of the same tensor
          when written in several coordinate bases. The same mechanism  is
          also useful to define submanifolds of any dimension and perform
          restrictions of tensors defined on the manifold.

          0011:  TTC.m Tensor Tools Package (January 4, 1994; 23 kilobytes)

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