diff -r 997961aa6eee -r aead46a19767 src/mapping.rs
--- a/src/mapping.rs	Mon Apr 28 16:52:15 2025 -0500
+++ b/src/mapping.rs	Mon Apr 28 21:32:37 2025 -0500
@@ -294,3 +294,23 @@
     /// Returns the Lipschitz factor of `self` with respect to the (semi)norm `D`.
     fn lipschitz_factor(&self, seminorm: M) -> Option<Self::FloatType>;
 }
+
+/// Helper trait for implementing [`Lipschitz`] for mappings that implement [`DifferentiableImpl`].
+pub trait LipschitzDifferentiableImpl<X: Space, M>: DifferentiableImpl<X> {
+    type FloatType: Float;
+
+    /// Compute the lipschitz factor of the derivative of `f`.
+    fn diff_lipschitz_factor(&self, seminorm: M) -> Option<Self::FloatType>;
+}
+
+impl<'b, M, X, A> Lipschitz<M> for Differential<'b, X, A>
+where
+    X: Space,
+    A: LipschitzDifferentiableImpl<X, M> + Clone,
+{
+    type FloatType = A::FloatType;
+
+    fn lipschitz_factor(&self, seminorm: M) -> Option<Self::FloatType> {
+        (*self.g).diff_lipschitz_factor(seminorm)
+    }
+}