Fix typo in method name

1 files changed, 2 insertions, 1 deletions

diff --git a/mdpoly/algebra.py b/mdpoly/algebra.py
index 6d245c6..5b3c597 100644
--- a/mdpoly/algebra.py
+++ b/mdpoly/algebra.py
@@ -66,7 +66,7 @@ class AlgebraicStructure(Protocol):
         return isinstance(other, cls._constant)
 
     @classmethod
-    def _is_paramter(cls: T, other: T) -> bool:
+    def _is_parameter(cls: T, other: T) -> bool:
         return isinstance(other, cls._parameter)
 
     @classmethod
@@ -285,6 +285,7 @@ class PartialDiff(Expr, HasRepr, PolyRingAlgebra):
     def __repr__(self) -> str:
         return f"(∂_{self.wrt} {self.inner})"
 
+
 @unary_operator
 class Diff(Expr, PolyRingAlgebra):
     """ Total differentiation. """