BezierInfo-2/docs/images/snippets/extremities/a6acf08f43aa1f48c08a40e76bdd2a31.ascii

 
a= v -2v +v  = 3(-p  + 3p  - 3p  + p )
    1   2  3       1     2     3    4
b= 2(v -v ) = 6(p  - 2p  + p )        
      2  1       1     2    3
c= v  = 3(p -p )                      
    1      2  1