diff -r 99ad55974e62 -r 981069ef919b src/loc.rs
--- a/src/loc.rs	Mon Dec 30 15:46:28 2024 -0500
+++ b/src/loc.rs	Tue Dec 31 10:51:32 2024 -0500
@@ -709,6 +709,12 @@
     type Owned = Self;
 
     #[inline]
+    fn add_mul<I : Instance<Loc<F, N>>>(mut self, α : F, x : I, β : F) -> Self {
+        self.axpy(α, x, β);
+        self
+    }
+
+    #[inline]
     fn axpy<I : Instance<Loc<F, N>>>(&mut self, α : F, x : I, β : F) {
         x.eval(|x̃| {
             if β == F::ZERO {