diff options
Diffstat (limited to 'src/algebra/fs2expxp.spad.pamphlet')
| -rw-r--r-- | src/algebra/fs2expxp.spad.pamphlet | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/algebra/fs2expxp.spad.pamphlet b/src/algebra/fs2expxp.spad.pamphlet index 15fa5661..15b46ca9 100644 --- a/src/algebra/fs2expxp.spad.pamphlet +++ b/src/algebra/fs2expxp.spad.pamphlet @@ -342,7 +342,7 @@ FunctionSpaceToExponentialExpansion(R,FE,x,cen):_ -- If the series has order zero and the constant term a0 of the -- series involves x, the function tries to expand exp(a0) as -- a power series. - (deg := order(ups,1)) < 0 => + negative?(deg := order(ups,1)) => -- this "can't happen" error "exp of function with sigularity" deg > 0 => [exp(ups)] @@ -385,7 +385,7 @@ FunctionSpaceToExponentialExpansion(R,FE,x,cen):_ -- check to see if lowest order coefficient is a negative rational negRat? : Boolean := ((rat := ratIfCan coef) case RN) => - (rat :: RN) < 0 => true + negative?(rat :: RN) => true false false logTerm : FE := @@ -423,7 +423,7 @@ FunctionSpaceToExponentialExpansion(R,FE,x,cen):_ (f := retractIfCan(xxp)@Union(UPXS,"failed")) case "failed" => stateProblem(fcnName,"multiply nested exponential") upxs := f :: UPXS - (deg := order(upxs,1)) < 0 => + negative? (deg := order(upxs,1)) => stateProblem(fcnName,"essential singularity") deg > 0 => [fcn(upxs) :: UPXS :: XXP] lc := coefficient(upxs,0); xOpList := opsInvolvingX lc @@ -532,7 +532,7 @@ FunctionSpaceToExponentialExpansion(R,FE,x,cen):_ yCoef := coefficient(y,-1) [(monomial(log yCoef,0)+integrate(y - monomial(yCoef,-1)$UPXS)) :: XXP] cc : FE := - ord < 0 => + negative? ord => (rn := ratIfCan(ord :: FE)) case "failed" => -- this condition usually won't occur because exponents will -- be integers or rational numbers |