Fix support of HalfCauchy (#3199)

eigenfoo · junpenglao · commit a9cd64d5b655 · 2018-09-16T21:40:45.000+02:00
diff --git a/pymc3/distributions/continuous.py b/pymc3/distributions/continuous.py
@@ -1957,7 +1957,7 @@ class HalfCauchy(PositiveContinuous):
         plt.show()
 
     ========  ========================
-    Support   :math:`x \in \mathbb{R}`
+    Support   :math:`x \in [0, \infty)`
     Mode      0
     Mean      undefined
     Variance  undefined
