What is that vector v in description of
gsl_linalg_QR_QTvec() and gsl_linalg_QR_Qvec() ?
In description of gsl_linalg_QR_Rsolve() function:
" ... It may be useful if the
product b prim = QT* b has already been computed using gsl_linalg_QR_QTvec."
That means, that
b prim = QT*b and commes from gsl_linalg_QR_QTvec() function.
About gsl_linalg_QR_QTvec() one reads function:
" ... vector v, storing the result QT v in v. ..."
That means, that these vector v = QT * b ?
About function int gsl_linalg_QR_Qvec() function one read :
" .... vector v, storing the result Qv in v. ..."
That means that these vector v = Q * b ?
These two descriptions of both functions should be :
1.) in the first description:
"Function int gsl_linalg_QR_QTvec ...
... vector b, storing the result QT* b in b. ..."
2.) in the second description:
" Function int gsl_linalg_QR_Qvec ...
... vector b, storing the result Q*b in b. ....
Best regards
Andrzej Buczynski
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