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[Lapack] typo in blas quick reference quide


I am writing to report a small typo in the BLAS Quick Reference Guide.  The
operation for xSYR2K is:

 C = alpha*A*B.' + alpha*B*A.' + beta*C

The reference has:

 C = alpha*A*B.' + conj(alpha)*B*A.' + beta*C

There is no conjugation of alpha in SYR2K.

Thanks for maintaining a great BLAS and LAPACK website!

Nick Henderson
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