catalog.py fix

Author: grhkm21

src/sage/stats/distributions/catalog.py

@@ -15,7 +15,7 @@
 
 To import these names into the global namespace, use::
 
-    sage: from sage.stats.channels_catalog import *
+    sage: from sage.stats.distributions.catalog import *
 
 """
 #*****************************************************************************
@@ -27,7 +27,8 @@
 #                  http://www.gnu.org/licenses/
 #*****************************************************************************
 
-from sage.misc.lazy_import import lazy_import as _lazy_import
-_lazy_import("sage.stats.distributions.discrete_gaussian_integer", ["DiscreteGaussianDistributionIntegerSampler"])
-_lazy_import("sage.stats.distributions.discrete_gaussian_lattice", ["DiscreteGaussianDistributionLatticeSampler"])
-_lazy_import("sage.stats.distributions.discrete_gaussian_polynomial", ["DiscreteGaussianDistributionPolynomialSampler"])
+from sage.misc.lazy_import import lazy_import
+lazy_import("sage.stats.distributions.discrete_gaussian_integer", ["DiscreteGaussianDistributionIntegerSampler"])
+lazy_import("sage.stats.distributions.discrete_gaussian_lattice", ["DiscreteGaussianDistributionLatticeSampler"])
+lazy_import("sage.stats.distributions.discrete_gaussian_polynomial", ["DiscreteGaussianDistributionPolynomialSampler"])
+del lazy_import

src/sage/stats/distributions/discrete_gaussian_lattice.py

@@ -10,7 +10,7 @@
 
 .. MATH::
 
-    `\frac{\exp(-|x - c|_2^2 / (2\sigma^2))}{\sum_{x \in \Lambda} \exp(-|x|_2^2 /
+    `\frac{\exp(-|x - c|_2^2 / (2\sigma^2))}{\sum_{v \in \Lambda} \exp(-|v|_2^2 /
     (2\sigma^2))}`
 
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