torch.geqrf

torch.geqrf(input, out=None) -> (Tensor, Tensor)

This is a low-level function for calling LAPACK directly. This function returns a namedtuple (a, tau) as defined in LAPACK documentation for geqrf .

You’ll generally want to use torch.qr() instead.

Computes a QR decomposition of input, but without constructing $Q$ and $R$ as explicit separate matrices.

Rather, this directly calls the underlying LAPACK function ?geqrf which produces a sequence of ‘elementary reflectors’.

See LAPACK documentation for geqrf for further details.

Parameters

• input (Tensor) – the input matrix

• out (tuple, optional) – the output tuple of (Tensor, Tensor)