title: Inverting tridiagonal matrix
body: <p>I am having an equation</p>
  
  <p>Ax=By</p>
  
  <p>Where A and  B are tridiagonal matrices. I want to calculate a matrix </p>
  
  <p>C=inv (A).B</p>
  
  <p>there are different x,s which will give different y,s hence calculation of C is handy. </p>
  
  <p>Can someone please tell me a faster method to compute the inverse. I am using Python 3.5 and prefer if we use any method from numpy. If not possible I can use scipy or cython as second and third choice. </p>
  
  <p>I have seen other similar questions but they do not fully match with my problem. </p>
  
  <p>Thank you </p>