subroutine fpbspl(t,n,k,x,l,h)
c subroutine fpbspl evaluates the (k+1) non-zero b-splines of
c degree k at t(l) <= x < t(l+1) using the stable recurrence
c relation of de boor and cox.
c ..
c ..scalar arguments..
real x
integer n,k,l
c ..array arguments..
real t(n),h(6)
c ..local scalars..
real f,one
integer i,j,li,lj
c ..local arrays..
real hh(5)
c ..
one = 0.1e+01
h(1) = one
do 20 j=1,k
do 10 i=1,j
hh(i) = h(i)
10 continue
h(1) = 0.
do 20 i=1,j
li = l+i
lj = li-j
f = hh(i)/(t(li)-t(lj))
h(i) = h(i)+f*(t(li)-x)
h(i+1) = f*(x-t(lj))
20 continue
return
end