Function qr_rrule 

pub fn qr_rrule<T: Scalar>(
    _tensor: &Tensor<T>,
    _cotangent: &QrCotangent<T>,
) -> AdResult<Tensor<T>>

Reverse-mode AD rule for QR (VJP / pullback).

Examples

use tenferro_linalg::{qr_rrule, QrCotangent};
use tenferro_tensor::{Tensor, MemoryOrder};
use tenferro_device::LogicalMemorySpace;

let col = MemoryOrder::ColumnMajor;
let mem = LogicalMemorySpace::MainMemory;
let a = Tensor::<f64>::zeros(&[4, 3], mem, col);
let cotangent = QrCotangent {
    q: Some(Tensor::ones(&[4, 3], mem, col)),
    r: None,
};
let grad_a = qr_rrule(&a, &cotangent).unwrap();