[equation][1]

I'm trying to solve this form of Fredholm equation. where, vinit, vth, vstep, vleak is a constant and
 [f1 description][2]

Are there any method or theorm that can solve this problem?

Since I'm freshman in university, it's very challenging for me. But I really want to untangle this problem.

Can you help me to solve this kind of equation or let me know what theory I should start with?

I would be grateful if you could just give me directions, so I can know where to start studying. Sorry for my bad English.



  [1]: https://i.sstatic.net/jM0Au.png
  [2]: https://i.sstatic.net/59oBs.png