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- Path: sparky!uunet!sun-barr!ames!agate!agate!usenet
- From: lee@math.washington.edu (John M. Lee)
- Newsgroups: comp.archives
- Subject: [sci.math.symbolic] Ricci tensor analysis package for Mathematica
- Followup-To: sci.math.symbolic,sci.math
- Date: 4 Sep 1992 07:52:42 GMT
- Organization: Mathematics Dept., U. of Washington
- Lines: 92
- Approved: adam@soda.berkeley.edu
- Distribution: world
- Message-ID: <1874kaINN1vl@agate.berkeley.edu>
- References: <LEE.92Aug25111329@pythagoras.math.washington.edu>
- NNTP-Posting-Host: soda.berkeley.edu
- X-Original-Newsgroups: sci.math.symbolic,sci.math
- X-Original-Date: Tue, 25 Aug 1992 19:13:29 GMT
-
- Archive-name: auto/sci.math.symbolic/Ricci-tensor-analysis-package-for-Mathematica
-
- Announcing the release of
-
- RICCI
-
- A Mathematica package for doing tensor calculations
- in differential geometry
-
- Version 1.0
-
-
- The first public release of Ricci, a new Mathematica package for doing
- tensor computations in differential geometry, is now available.
-
- Ricci has the following features and capabilities:
-
- * Manipulation of tensor expressions with and without indices
- * Implicit use of the Einstein summation convention
- * Correct manipulation of dummy indices
- * Display of results in mathematical notation, with upper and lower indices
- * Automatic calculation of covariant derivatives
- * Automatic application of tensor symmetries
- * Riemannian metrics and curvatures
- * Differential forms
- * Any number of vector bundles with user-defined characteristics
- * Names of indices indicate which bundles they refer to
- * Complex bundles and tensors
- * Conjugation indicated by barred indices
- * Connections with and without torsion
-
- Ricci requires Mathematica version 2.0 or greater. The source takes
- approximately 270K bytes of disk storage, including about 49K bytes of
- on-line documentation. The package was developed and tested on a
- DECStation 5000 running Unix, but there are no known system-dependent
- features, so it should run on any system that can run Mathematica with 7
- megabytes or more of available memory.
-
- The source files for Ricci are available to the public by anonymous ftp
- from the Stanford Mathematica Users Forum library (otter.stanford.edu). To
- obtain them, you can log into any system that has an Internet connection
- and supports the ftp (file transfer program) command. Make yourself a
- directory to hold the Ricci files. Then, if you're using unix, you can cd
- to your new directory and follow the script below.
-
- % ftp otter.stanford.edu
- Connected to otter.stanford.edu.
- 220 otter FTP server (Version 5.20 (NeXT 1.0) Sun Nov 11, 1990) ready.
- Name (otter.stanford.edu:): anonymous
- 331 Guest login ok, send ident as password.
- Password: <---------------------------------Type your e-mail address here.
- 230 Guest login ok, access restrictions apply.
- ftp> cd mma/Geometry/Ricci
- 250 CWD command successful.
- ftp> prompt <---------------This turns off prompting for individual files.
- Interactive mode off.
- ftp> mget *
- 200 PORT command successful.
- 150 Opening ASCII mode data connection for Bundle.m (14905 bytes).
- 226 Transfer complete.
- local: Bundle.m remote: Bundle.m
- 15268 bytes received in 0.53 seconds (28 Kbytes/s)
- ... <-----------------------------------------------Lots more of the same.
- 226 Transfer complete.
- local: Usage.m remote: Usage.m
- 52928 bytes received in 1.2 seconds (43 Kbytes/s)
- ftp> bye
- 221 Goodbye.
-
- Once you've successfully transferred the Ricci files, look at the file
- named README for more information about what's in the files and how to get
- started using Ricci.
-
- This is the first public release of Ricci. If you use this package at all,
- I would appreciate it if you would send me a message at the e-mail address
- below describing your experience, and telling me whether you found the
- package useful or not. I'd especially like to hear about any bugs,
- anomalous behavior, things that look like they should simplify but don't,
- suggestions for improvement, things that seem to take longer than they
- should, etc. And please feel free to get in touch with me if you have
- questions about the software. If I get e-mail from you, I'll inform you
- whenever I release a new production version.
-
-
- John M. Lee
- Department of Mathematics, GN-50
- University of Washington
- Seattle, WA 98195
-
- Internet: lee@math.washington.edu
- Fax: 206-543-0397
-
-