From a9e32579dd3ddcb8eee5aebda62b4a3471b69ee3 Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Mon, 30 Jul 2018 23:53:05 -0500
Subject: [PATCH] Fix one aspect of 1D support

---
 grudge/symbolic/primitives.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/grudge/symbolic/primitives.py b/grudge/symbolic/primitives.py
index 35c45268..7c92087d 100644
--- a/grudge/symbolic/primitives.py
+++ b/grudge/symbolic/primitives.py
@@ -508,6 +508,9 @@ def parametrization_derivative(ambient_dim, dim=None, dd=None):
     if dim is None:
         dim = ambient_dim
 
+    if dim == 0:
+        return MultiVector(np.array([1.]))
+
     from pytools import product
     return product(
         forward_metric_derivative_mv(ambient_dim, rst_axis, dd)
-- 
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