diff -r c5d8bd1a7728 -r 0f59c0d02e13 src/kernels/hat_convolution.rs
--- a/src/kernels/hat_convolution.rs	Thu Jan 23 23:35:28 2025 +0100
+++ b/src/kernels/hat_convolution.rs	Mon Jan 06 21:37:03 2025 -0500
@@ -1,7 +1,7 @@
 //! Implementation of the convolution of two hat functions,
 //! and its convolution with a [`CubeIndicator`].
 use numeric_literals::replace_float_literals;
-use serde::Serialize;
+use serde::{Serialize, Deserialize};
 use alg_tools::types::*;
 use alg_tools::norms::*;
 use alg_tools::loc::Loc;
@@ -69,7 +69,7 @@
 // $$
 //     [∇f(x\_1, …, x\_n)]_j = \frac{4}{σ} (h\*h)'(x\_j/σ) \prod\_{j ≠ i} \frac{4}{σ} (h\*h)(x\_i/σ)
 // $$
-#[derive(Copy,Clone,Debug,Serialize,Eq)]
+#[derive(Copy,Clone,Debug,Serialize,Deserialize,Eq)]
 pub struct HatConv<S : Constant, const N : usize> {
     /// The parameter $σ$ of the kernel.
     pub radius : S,