I do not understand why the following code does not solve the equation:
ClearAll eqn = y[t] == \!\( \*SubsuperscriptBox[\(\[Integral]\), \(0\), \(t\)]\(Exp[ a \((t - s)\)] y[s] \[DifferentialD]s\)\); sol = DSolve[eqn, y[t], t, y = 1]
Can someone help me please? Thanks in advance.
I tried to use yours idea on the real case, obtaining the following, which is still an integral-differential equation: