this problem is the R and n which is the recurrent neural network not the recursive neural network I've made that mistake but RN ends are a new approach to this which asked the question how do you calculate a function on a variable-length set of input and they answer it using a for loop in math where they recursively define the output at any stage as a function of the inputs at the previous stages and the previous output and then for the purpose of supervised learning the final output is just the final hidden state here and so