<p>In <a href="https://github.com/mlpack/mlpack/pull/757#discussion_r75575591">src/mlpack/methods/ann/layer/inception_layer.hpp</a>:</p>
<pre style='color:#555'>&gt; +    // Forward pass for 3x3 pool path. 
&gt; +    pool3.InputParameter() = input;
&gt; +    pool3.Forward(input, pool3.OutputParameter());
&gt; +    Pad(pool3.OutputParameter(), 1, 1, convPool.InputParameter());
&gt; +    convPool.Forward(pool3.OutputParameter(), convPool.OutputParameter());
&gt; +    biasPool.Forward(convPool.OutputParameter(), biasPool.OutputParameter());
&gt; +    basePool.InputParameter() = biasPool.OutputParameter();
&gt; +    basePool.Forward(convPool.OutputParameter(), basePool.OutputParameter());
&gt; +
&gt; +    // concatenate outputs of all the paths.
&gt; +    output = arma::join_slices( 
&gt; +              arma::join_slices(
&gt; +                arma::join_slices( 
&gt; +                  base1.OutputParameter(), base3.OutputParameter() ), 
&gt; +                  base5.OutputParameter() ), basePool.OutputParameter());
&gt; +
</pre>
<p>but inception layer does not do any operation in itself, it just calls its constituent layers, so if inception layer does not need to have any weights, what should we initialize it to?</p>

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