Description
1D map
The perioddoubling accumulation point in unimodal map of 6th power.
For 1D maps with extremum and cubic inflection point  the limit of perioddoubling
on a curve in the 3D parameter space defined by the condition "extremum
to iflection point" or vise versa.
More general systems
Spoint appears generically in codimension 5, but the pseudoS type may
occur, in codimension 3 as an intermediate asymptotics.
RG equation
The fixed point
The orbital scaling factor
Critical multiplier
Relevant eigenvalues
A
B
Codimension CoDim=5 (restr. 3)

Codimension3 example (S_{A} type)
Parameter space scaling with factors
Scaling coordinates
show enlarged figure
