poly (Poly) – poly to be decoded with attribute keyfor =
(‘e^{kt}’,’t’,’k^{-}’,’v0-theta’,’theta’,’sigma’,
‘l_{1:n}’, ‘o_{1:n}’,
‘sigma/2k’,’rho-sigma/2k’,’sqrt(1-rho^2)’)
par (dict) – parameters in dict, jumptime (tuple) and jumpsize (tuple)
must also be included