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README file from "libconv" directory 

                       toolbox/documents/libconv README


       LIBCONV, An SGI Optimized Library for Convolution and Correlation



   This PostScript file is a link to toolbox/lib/mathlib/libconv/doc.  As of
   Version 3.1 of the Developer's Toolbox, libconv is a new addition to the
   math library subtree.  From the introducion:


   Libconv is an optimized library available on Silicon Graphics computers.
   It features Convolution for Finite Impulse Response (FIR) and Infinite
   Impulse Response (IIR) filters, together with Correlations.  The library
   modules take 1D and 2D inputs, and are available in single and double
   precision for real and complex arithmetic.  The 2D subprograms have been
   parallelized and take full advantage of SGI parallel architecture.

   Section 1 presents the definitions used for Convolution and Correlation,
   1D and 2D.  Libconv implementation and conventions are explained in 
   section 2.  Examples of performance achieved by Libconv modules are
   presented in section 3.

   In the Appendix three short programs provide examples of practical usage
   of Libconv modules.
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