172   Index bcols = A.cols();  in upperbidiagonalization_blocked_helper()  local
179     Index remainingCols = bcols - k - 1;  in upperbidiagonalization_blocked_helper()
192     if(k+1<bcols)  in upperbidiagonalization_blocked_helper()
258   if(bs<bcols)  in upperbidiagonalization_blocked_helper()
262   if(bcols>bs && brows>bs)  in upperbidiagonalization_blocked_helper()
264     SubMatType A11( A.bottomRightCorner(brows-bs,bcols-bs) );  in upperbidiagonalization_blocked_helper()
266     SubMatType A01( A.block(0,bs, bs,bcols-bs) );  in upperbidiagonalization_blocked_helper()
269     A11.noalias() -= A10 * Y.topLeftCorner(bcols,bs).bottomRows(bcols-bs).adjoint();  in upperbidiagonalization_blocked_helper()
314     Index bcols = cols - k;                   // columns of the block  variable
330     BlockType B = A.block(k,k,brows,bcols);
336     if(k+bs==cols || bcols<48) // somewhat arbitrary threshold
352                                                         Y.topLeftCorner(bcols,bs)