lrux.init_pf_carrier

lrux.init_pf_carrier(A: Array, max_delay: int, max_rank: int = 2) → PfCarrier

Prepare the data and space for pf_lru_delayed.

Parameters:

• A – The initial skew-symmetric matrix \(A_0\) with shape (n, n).

• max_delay – The maximum iterations T of delayed updates, usually chosen to be ~n/10.

• max_rank – The maximum rank K in delayed updates, default to 2.

Returns:

A NamedTuple with the following attributes.

Ainv:

The initial matrix inverse \(A_0^{-1}\) of shape (n, n).

a:

The delayed update vectors of shape (T, n, K), initialized to 0

Rinv:

The delayed update matrices \(R_t^{-1}\) of shape (T, K, K), initialized to 0