From: Michael Orlitzky <michael@orlitzky.com>
Date: Thu, 29 Aug 2019 15:52:25 +0000 (-0400)
Subject: eja: reword a comment.
X-Git-Url: https://gitweb.michael.orlitzky.com/?a=commitdiff_plain;h=bd94f055a5fdd9385c4014b74e115a7f5f0223fd;p=sage.d.git

eja: reword a comment.
---

diff --git a/mjo/eja/eja_algebra.py b/mjo/eja/eja_algebra.py
index 4673e91..3cb7467 100644
--- a/mjo/eja/eja_algebra.py
+++ b/mjo/eja/eja_algebra.py
@@ -1263,7 +1263,9 @@ class ComplexMatrixEuclideanJordanAlgebra(MatrixEuclideanJordanAlgebra):
         if not n.mod(2).is_zero():
             raise ValueError("the matrix 'M' must be a complex embedding")
 
-        field = M.base_ring() # This should already have sqrt2
+        # If "M" was normalized, its base ring might have roots
+        # adjoined and they can stick around after unembedding.
+        field = M.base_ring()
         R = PolynomialRing(field, 'z')
         z = R.gen()
         F = NumberField(z**2 + 1,'i', embedding=CLF(-1).sqrt())