Csparsej Released

2012-05-08T00:00:00-07:00

It is with great pleasure that I am able announce the release of CSparseJ version 1.1. The main feature of this release is complex number support. Solving sparse sets of complex linear equations is a common practice in electric power system analysis, as well as in many other areas of scientific computing.

Overview

CSparseJ is a Java port of CSparse (a Concise Sparse matrix package). CSparse is a sparse matrix package written in C by Tim Davis. CSparseJ version 1.0 was released by Piotr Wendykier on June 13, 2009. It featured single and double precision real number support.

This release adds double precision complex number support for all of the same functions. Complex numbers are represented using arrays of primitive doubles, where the real and imaginary components are stored alternately, for optimal performance.

Benchmarks

CSparseJ 1.1 was benchmarked against CXSparse 2.2.6 using the testbed:

IBM Thinkpad T61p,
Intel Core 2 Duo CPU T9300 (2.5GHz),
8 Gb RAM,
Ubuntu 12.04 (Precise Pangolin) 64-bit,
Linux Kernel 3.2.0-24-generic,
OpenJDK 64-Bit Server VM (1.6.0_24),
GCC version 4.6.3,
Java flags: -d64 -server -Xms2g -Xmx2g -XX:+UseParallelGC
C compiler flags: -O2

Maven

With this release CSparseJ is available from Maven’s central repository. CSparseJ can be used in your project by adding this to your Maven POM:

<dependency>
  <groupId>net.sourceforge.csparsej</groupId>
  <artifactId>csparsej</artifactId>
  <version>1.1.1</version>
</dependency>

The artifacts are synced with Maven Central using Sonatype OSS. New releases can be staged using the commands:

$ mvn release:prepare
$ mvn release:perform

License

CSparseJ is available under the terms of the GNU Lesser General Public License (LGPL) version 2.1, or (at your option) any later version.

CSparseJ is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

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