LinAlg LinAlg is a C++ Linear Algebra and Optimization classlib. The library: defines Matrix,Vector, subMatrices, and LAStreams over real domain; contains efficient and fool-proof implementations of level 1 and 2 BLAS (element-wise operations and various multiplications), transposition, determinant evaluation and matrix inverse. There are operations on a single row/col/diagonal of a matrix. Distinct features of the package are Matrix views, various Matrix streams, and LazyMatrices. Lazy construction allows one to write matrix expressions in a natural way while imposing no hidden temporaries, no deep copying, and no reference counting. LinAlg stresses Matrix streams, which provide a sequential view/access to a matrix or its parts. LABlockStreams may span over an arbitrary rectangular block of a matrix, including the whole matrix, a single matrix element, and all other block sizes in between. Matrix streams are seek-able and subrange-able. A stream or a substream are always created in-line; they do not allocate any heap storage, and are safe. The package implements Singular Value Decomposition (SVD), and its application to solving Ax=b, where matrix A does not have to be square, and b does not have to be a thin vector. The package also implements Brent's univariate optimization and root finding, Hooke-Jeeves multidimensional optimization of functors, and Aitken-Lagrange interpolation. Every feature is extensively tested in the validation code (included).

Current Version:   4.3, December 25, 1998. License Type:   Public Domain

Home Site: http://pobox.com/~oleg/ftp/packages.html Source Code Availability: Yes Available Binary Packages: Debian Package:   No RedHat RPM Package:   No Other Packages:   No Targeted Platforms: gcc 2.7.2.1 Linux 2.0.33 i586; egcs-1.1.1 (optimization off, no '-freg-struct-return' gcc flag), Linux i686; gcc 2.8.1 (optimization off) on HP-PA, Solaris/Sparc; SGI's native compiler (optimization off); Visual C++ 5.0 WinNT 4.0; Metrowerk's CodeWarrior C++, BeOS Release 4. Software/Hardware Requirements: C++ compiler

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