diff options
Diffstat (limited to 'src/algebra/combfunc.spad.pamphlet')
| -rw-r--r-- | src/algebra/combfunc.spad.pamphlet | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/algebra/combfunc.spad.pamphlet b/src/algebra/combfunc.spad.pamphlet index 41fe5af5..25e7d3e4 100644 --- a/src/algebra/combfunc.spad.pamphlet +++ b/src/algebra/combfunc.spad.pamphlet @@ -60,7 +60,7 @@ to reduce to zero. CombinatorialFunction(R, F): Exports == Implementation where - R: Join(OrderedSet, IntegralDomain) + R: IntegralDomain F: FunctionSpace R OP ==> BasicOperator @@ -518,7 +518,7 @@ dummy variable is introduced to make the indexing variable \lq local\rq. if R has RetractableTo(Z) and F has Algebra(Fraction(Z)) then iibinom l == (s:=retractIfCan(first l-second l)@Union(R,"failed")) case R and - (t:=retractIfCan(s)@Union(Z,"failed")) case Z and s>0=> + (t:=retractIfCan(s)@Union(Z,"failed")) case Z and t > 0 => ans:=1::F for i in 1..t repeat ans:=ans*(second l+i::R::F) @@ -616,7 +616,7 @@ equality. ++ Description: Provides some special functions over an integral domain. ++ Keywords: special, function. FunctionalSpecialFunction(R, F): Exports == Implementation where - R: Join(OrderedSet, IntegralDomain) + R: IntegralDomain F: FunctionSpace R OP ==> BasicOperator @@ -716,7 +716,7 @@ FunctionalSpecialFunction(R, F): Exports == Implementation where iabs x == zero? x => 0 is?(x, opabs) => x - x < 0 => kernel(opabs, -x) + before?(x,0) => kernel(opabs, -x) kernel(opabs, x) -- Could put more conditional special rules for other functions here @@ -805,7 +805,7 @@ FunctionalSpecialFunction(R, F): Exports == Implementation where ++ Date Last Updated: 19 April 1991 ++ Description: computes sums of top-level expressions; FunctionSpaceSum(R, F): Exports == Implementation where - R: Join(IntegralDomain, OrderedSet, + R: Join(IntegralDomain, RetractableTo Integer, LinearlyExplicitRingOver Integer) F: Join(FunctionSpace R, CombinatorialOpsCategory, AlgebraicallyClosedField, TranscendentalFunctionCategory) |