Hi,

In http://deeplearning.net/software/theano/tutorial/faq_tutorial.html

it says that:

subset = lookup_table[vector_of_indices]

>From now on, use only ‘subset’. Do not call lookup_table[vector_of_indices]
again. This causes problems with grad as this will create new variables.

What exactly are the "problems" mentioned here? Should fetching a subtensor
out of lookup table completely avoided?

Thanks.
-- 
Ozan Çağlayan
Research Assistant
Galatasaray University - Computer Engineering Dept.
http://www.ozancaglayan.com

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