title: P-adic cohomology
text: # P-adic cohomology
  
  In mathematics, p-adic cohomology means a cohomology theory for varieties of characteristic p whose values are modules over a ring of p-adic integers. Examples (in roughly historical order) include:
  
  * Serre's Witt vector cohomology
  * Monsky–Washnitzer cohomology
  * Infinitesimal cohomology
  * Crystalline cohomology
  * Rigid cohomology
  