minor math equation error (pytorch#85)

Shuailong · soumith · commit 17b8b4dbaba3 · 2017-05-18T10:24:34.000-04:00
add "-" sign
diff --git a/beginner_source/nlp/word_embeddings_tutorial.py b/beginner_source/nlp/word_embeddings_tutorial.py
@@ -290,7 +290,7 @@ def forward(self, inputs):
 # and :math:`w_{i+1}, \dots, w_{i+N}`, referring to all context words
 # collectively as :math:`C`, CBOW tries to minimize
 #
-# .. math::  -\log p(w_i | C) = \log \text{Softmax}(A(\sum_{w \in C} q_w) + b)
+# .. math::  -\log p(w_i | C) = -\log \text{Softmax}(A(\sum_{w \in C} q_w) + b)
 #
 # where :math:`q_w` is the embedding for word :math:`w`.
 #

Original file line number	Diff line number	Diff line change
`@@ -290,7 +290,7 @@ def forward(self, inputs):`
`290`	`290`	# and :math:`w_{i+1}, \dots, w_{i+N}`, referring to all context words
`291`	`291`	# collectively as :math:`C`, CBOW tries to minimize
`292`	`292`	`#`
`293`		`-# .. math:: -\log p(w_i \| C) = \log \text{Softmax}(A(\sum_{w \in C} q_w) + b)`
	`293`	`+# .. math:: -\log p(w_i \| C) = -\log \text{Softmax}(A(\sum_{w \in C} q_w) + b)`
`294`	`294`	`#`
`295`	`295`	# where :math:`q_w` is the embedding for word :math:`w`.
`296`	`296`	`#`