diff -r 8979a6638424 -r 17d71ca4ce84 src/dist.rs
--- a/src/dist.rs	Mon Oct 21 10:02:57 2024 -0500
+++ b/src/dist.rs	Mon Oct 21 10:05:07 2024 -0500
@@ -45,7 +45,8 @@
 
 impl<M : ManifoldPoint> Desc<M> for DistToSquaredDiv2<M> {
     fn desc(&self, τ : f64, x : M) -> M {
-        x.exp(&(self.grad(&x) * τ))
+        let t = self.grad(&x) * τ;
+        x.exp(&t)
     }
 }