MATLAB: How to describe the nth term of convolution in matlab

convolutionnth term of convolution

how I can describe

, I need this code in the applicatin of differential transformation method

See conv(): https://www.mathworks.com/help/matlab/ref/conv.html. You need to provide the complete array of u and v for convolution.

Read about conv2.

s1 = conv2(conv2(f1,f2),f3)
s2 = conv2(conv2(f2,f3),f1)
s3 = conv2(conv2(f1,f3),f2)

All the abve three are same.

t = head_rcv(head_rcv ~= 0);
ruffled_head = t(randi(length(t)));