Docstring fix for indexing of grading of a stratification

sagemath · Aug 21, 2018 · f1a0b1e · f1a0b1e
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diff --git a/src/sage/categories/finite_dimensional_graded_lie_algebras_with_basis.py b/src/sage/categories/finite_dimensional_graded_lie_algebras_with_basis.py
@@ -110,7 +110,7 @@ class Stratified(CategoryWithAxiom_over_base_ring):
 
         A stratified Lie algebra is a graded Lie algebra that is generated
         as a Lie algebra by its homogeneous component of degree 1. That is
-        to say, For a graded Lie algebra `L = \bigoplus_{k=0}^M L_k`,
+        to say, for a graded Lie algebra `L = \bigoplus_{k=1}^M L_k`,
         we have `L_{k+1} = [L_1, L_k]`.
 
         TESTS::

diff --git a/src/sage/categories/graded_lie_algebras.py b/src/sage/categories/graded_lie_algebras.py
@@ -47,7 +47,7 @@ class Stratified(CategoryWithAxiom_over_base_ring):
         r"""
         Category of stratified Lie algebras.
 
-        A graded Lie algebra `L = \bigoplus_{k=0}^M L_k` (where
+        A graded Lie algebra `L = \bigoplus_{k=1}^M L_k` (where
         possibly `M = \infty`) is called *stratified* if it is generated
         by `L_1`; in other words, we have `L_{k+1} = [L_1, L_k]`.