Fix out of date docstrings

2 files changed, 13 insertions, 13 deletions

diff --git a/mdpoly/algebra.py b/mdpoly/algebra.py
index 117ad51..1efbabf 100644
--- a/mdpoly/algebra.py
+++ b/mdpoly/algebra.py
@@ -7,7 +7,7 @@ from .errors import AlgebraicError, InvalidShape
 from .state import State
 from .index import Shape, MatrixIndex, PolyIndex, Number
 
-from typing import cast, Protocol, Self, Sequence
+from typing import cast
 from functools import reduce
 from itertools import product
 from abc import abstractmethod
@@ -74,7 +74,7 @@ class Reducible(Expr):
     """
 
     def to_repr(self, repr_type: type, state: State) -> tuple[Repr, State]:
-        """ See :py:meth:`mdpoly.representations.HasRepr.to_repr` """
+        """ See :py:meth:`mdpoly.abc.Expr.to_repr`. """
         return self.reduce().to_repr(repr_type, state)
 
     @abstractmethod
@@ -160,7 +160,7 @@ class PolyAdd(BinaryOp, PolyRingExpr):
     """ Addition operator between scalar polynomials. """
 
     def to_repr(self, repr_type: type, state: State) -> tuple[Repr, State]:
-        """ See :py:meth:`mdpoly.HasRepr.to_repr`. """
+        """ See :py:meth:`mdpoly.abc.Expr.to_repr`. """
         # Make a new empty representation
         r = repr_type()
 
@@ -184,7 +184,7 @@ class PolySub(BinaryOp, PolyRingExpr, Reducible):
     """ Subtraction operator between scalar polynomials. """
 
     def reduce(self) -> Expr:
-        """ See :py:meth:`mdpoly.algebra.ReducibleExpr.reduce`. """
+        """ See :py:meth:`mdpoly.algebra.Reducible.reduce`. """
         return self.left + (-1 * self.right)
 
     def __repr__(self) -> str:
@@ -195,7 +195,7 @@ class PolyMul(BinaryOp, PolyRingExpr):
     """ Multiplication operator between scalar polynomials. """
 
     def to_repr(self, repr_type: type, state: State) -> tuple[Repr, State]:
-        """ See :py:meth:`mdpoly.representations.HasRepr.to_repr`. """
+        """ See :py:meth:`mdpoly.abc.Expr.to_repr`. """
         r = repr_type()
 
         lrepr, state = self.left.to_repr(repr_type, state)
@@ -223,7 +223,7 @@ class PolyMul(BinaryOp, PolyRingExpr):
 class PolyExp(BinaryOp, PolyRingExpr, Reducible):
     """ Generic exponentiation (no type check). """
 
-    @property
+    @property # type: ignore[override]
     def right(self) -> Const: # type: ignore[override]
         if not isinstance(super().right, Const):
             raise AlgebraicError(f"Cannot raise {self.left} to {self.right} because"
@@ -238,10 +238,10 @@ class PolyExp(BinaryOp, PolyRingExpr, Reducible):
         BinaryOp.right.fset(self, right) # type: ignore
 
     def reduce(self) -> Expr:
-        """ See :py:meth:`mdpoly.algebra.ReducibleExpr.reduce`. """
+        """ See :py:meth:`mdpoly.algebra.Reducible.reduce`. """
         var = self.left
         if not isinstance(self.right.value, int):
-            raise NotImplementedError
+            raise NotImplementedError("Cannot raise to non-integer powers (yet).")
 
         ntimes = self.right.value - 1
         return reduce(operator.mul, (var for _ in range(ntimes)), var)
@@ -263,9 +263,9 @@ class PolyPartialDiff(UnaryOp, PolyRingExpr):
         return self.inner.shape
 
     def to_repr(self, repr_type: type, state: State) -> tuple[Repr, State]:
-        """ See :py:meth:`mdpoly.representations.HasRepr.to_repr`. """
+        """ See :py:meth:`mdpoly.abc.Expr.to_repr`. """
         r = repr_type()
-        lrepr, state = self.left.to_repr(repr_type, state)
+        lrepr, state = self.inner.to_repr(repr_type, state)
 
         entry = MatrixIndex.scalar()
         wrt = state.index(self.wrt)
@@ -366,7 +366,7 @@ class MatAdd(BinaryOp, PolyRingExpr):
     """ Addition operator between matrices. """
 
     def to_repr(self, repr_type: type, state: State) -> tuple[Repr, State]:
-        """ See :py:meth:`mdpoly.representations.HasRepr.to_repr`. """
+        """ See :py:meth:`mdpoly.abc.Expr.to_repr`. """
         # Make a new empty representation
         r = repr_type()
 
@@ -390,7 +390,7 @@ class MatSub(BinaryOp, PolyRingExpr, Reducible):
     """ Subtraction operator between matrices. """
 
     def reduce(self) -> Expr:
-        """ See :py:meth:`mdpoly.algebra.ReducibleExpr.reduce`. """
+        """ See :py:meth:`mdpoly.algebra.Reducible.reduce`. """
         return self.left + (-1 * self.right)
 
     def __repr__(self) -> str:
diff --git a/mdpoly/errors.py b/mdpoly/errors.py
index 152d6df..85432b8 100644
--- a/mdpoly/errors.py
+++ b/mdpoly/errors.py
@@ -1,7 +1,7 @@
 
 class AlgebraicError(Exception):
     """ This is raised whenever an invalid mathematical operation is performed.
-    See also :py:mod:`mdpoly.algebra` and :py:class:`mdpoly.algebra.AlgebraicStructure`
+    See also :py:mod:`mdpoly.algebra`.
     """
 
 class InvalidShape(Exception):