If a cubic spline is three times continuously
Chapter 19, Problem 19.4(choose chapter or problem)
If a cubic spline is three times continuously differentiable (that is, it has continuous first, second. and third derivatives). show that it must be a single polynomial
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer