How to find convolution of three functions.

if

lambda=0.75;
zeta=0.01;
gamma=0.4;
gamma1=0.5;
gamma2=0.6;
t=0.001:1:5
f1=exp((lambda+zeta+gamma)*(-t));
f2=exp((lambda+zeta+gamma1)*(-t));
f3=exp((lambda+zeta+gamma2)*(-t));

how to find convolution of these three functions f1,f2 and f3.

Answer 1

[KSSV]

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.

[mohammed shapique]

If s1 = conv2(conv2(f1,f2),f3) then how to find convolution of s1 and s1 (i.e) s1*s1

[KSSV]

s = conv2(s1,s1)