I am looking for the most efficient implementation of a routine in C for computing the euclidean norm of a vector taking into account speed and accuracy. Of course I have been using BLAS in C and Fortran, but to check possible under/overflow conditions insumes CPU time and to use extended precision also. Therefore the questions is: Which is in your experience the best approach ? Thank you very much in advance Hugo D.Scolnik Ph.D. Full professor Computer Sciences Department University of Buenos Aires  next part  An HTML attachment was scrubbed... URL: http://lists.cs.utk.edu/private/lapack/attachments/20061002/80d7f3fa/attachment.html 
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