| Safe Haskell | None | 
|---|---|
| Language | Haskell98 | 
MathObj.PowerSeries2
Description
Two-variate power series.
- newtype T a = Cons {}
 - isValid :: [[a]] -> Bool
 - check :: [[a]] -> [[a]]
 - fromCoeffs :: [[a]] -> T a
 - fromPowerSeries0 :: C a => T a -> T a
 - fromPowerSeries1 :: C a => T a -> T a
 - lift0 :: T a -> T a
 - lift1 :: (T a -> T a) -> T a -> T a
 - lift2 :: (T a -> T a -> T a) -> T a -> T a -> T a
 - const :: a -> T a
 - truncate :: Int -> T a -> T a
 - appPrec :: Int
 
Documentation
In order to handle both variables equivalently we maintain a list of coefficients for terms of the same total degree. That is
eval [[a], [b,c], [d,e,f]] (x,y) == a + b*x+c*y + d*x^2+e*x*y+f*y^2
Although the sub-lists are always finite and thus are more like polynomials than power series, division and square root computation are easier to implement for power series.
fromCoeffs :: [[a]] -> T a Source
fromPowerSeries0 :: C a => T a -> T a Source
fromPowerSeries1 :: C a => T a -> T a Source