eja: add a new TrivialEJA class and some tests for it.

[sage.d.git] / mjo / eja / eja_operator.py

diff --git a/mjo/eja/eja_operator.py b/mjo/eja/eja_operator.py
index c073bc41ad85d73fd942efe4e20f8e6f90bd1781..2a0c9c48633cd06551c49515840680b57a5b927d 100644 (file)
--- a/mjo/eja/eja_operator.py
+++ b/mjo/eja/eja_operator.py
@@ -438,7 +438,9 @@ class FiniteDimensionalEuclideanJordanAlgebraOperator(Map):
 
         SETUP::
 
-            sage: from mjo.eja.eja_algebra import RealSymmetricEJA, random_eja
+            sage: from mjo.eja.eja_algebra import (RealSymmetricEJA,
+            ....:                                  TrivialEJA,
+            ....:                                  random_eja)
 
         EXAMPLES::
 
@@ -453,6 +455,12 @@ class FiniteDimensionalEuclideanJordanAlgebraOperator(Map):
             sage: x.operator().is_invertible()
             True
 
+        The zero operator is invertible in a trivial algebra::
+
+            sage: J = TrivialEJA()
+            sage: J.zero().operator().is_invertible()
+            True
+
         TESTS:
 
         The identity operator is always invertible::