Function concrete_npe::estimate_keyswitch_noise_lwe_to_glwe_with_constant_terms

pub fn estimate_keyswitch_noise_lwe_to_glwe_with_constant_terms<D1, D2, K>(
    lwe_mask_size: LweDimension,
    dispersion_lwe: D1,
    dispersion_ksk: D2,
    base_log: DecompositionBaseLog,
    level: DecompositionLevelCount,
    log2_modulus: u32
) -> Variancewhere
    D1: DispersionParameter,
    D2: DispersionParameter,
    K: KeyDispersion,

Computes the dispersion of the constant terms of a GLWE after an LWE to GLWE keyswitch.

Example

use concrete_core::prelude::{
    BinaryKeyKind, DecompositionBaseLog, DecompositionLevelCount, LweDimension, Variance,
};
use concrete_npe::estimate_keyswitch_noise_lwe_to_glwe_with_constant_terms;
let lwe_mask_size = LweDimension(630);
let l_ks = DecompositionLevelCount(4);
let base_log = DecompositionBaseLog(7);
let dispersion_lwe = Variance(2_f64.powi(-38));
let dispersion_ks = Variance(2_f64.powi(-40));
let var_ks = estimate_keyswitch_noise_lwe_to_glwe_with_constant_terms::<_, _, BinaryKeyKind>(
    lwe_mask_size,
    dispersion_lwe,
    dispersion_ks,
    base_log,
    l_ks,
    64,
);