diff options
Diffstat (limited to 'src/algebra/algfunc.spad.pamphlet')
| -rw-r--r-- | src/algebra/algfunc.spad.pamphlet | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/algebra/algfunc.spad.pamphlet b/src/algebra/algfunc.spad.pamphlet index b32e1f56..bf4c4b71 100644 --- a/src/algebra/algfunc.spad.pamphlet +++ b/src/algebra/algfunc.spad.pamphlet @@ -222,25 +222,25 @@ AlgebraicallyClosedFunctionSpace(R: IntegralDomain): zeroOf(p:$, x:Symbol) == n := numer(f := univariate(p, kernel(x)$Kernel($))) - degree denom f > 0 => error "zeroOf: variable appears in denom" + positive? degree denom f => error "zeroOf: variable appears in denom" degree n = 0 => error "zeroOf: constant expression" zeroOf(n, x) rootOf(p:$, x:Symbol) == n := numer(f := univariate(p, kernel(x)$Kernel($))) - degree denom f > 0 => error "roofOf: variable appears in denom" + positive? degree denom f => error "roofOf: variable appears in denom" degree n = 0 => error "rootOf: constant expression" rootOf(n, x) zerosOf(p:$, x:Symbol) == n := numer(f := univariate(p, kernel(x)$Kernel($))) - degree denom f > 0 => error "zerosOf: variable appears in denom" + positive? degree denom f => error "zerosOf: variable appears in denom" degree n = 0 => empty() zerosOf(n, x) rootsOf(p:$, x:Symbol) == n := numer(f := univariate(p, kernel(x)$Kernel($))) - degree denom f > 0 => error "roofsOf: variable appears in denom" + positive? degree denom f => error "roofsOf: variable appears in denom" degree n = 0 => empty() rootsOf(n, x) @@ -358,7 +358,7 @@ AlgebraicFunction(R, F): Exports == Implementation where (r := retractIfCan(p)@Union(F, "failed")) case "failed" => inrootof(p, k::F) n := numer(f := univariate(r::F, k)) - degree denom f > 0 => error "roofOf: variable appears in denom" + positive? degree denom f => error "roofOf: variable appears in denom" inrootof(n, k::F) dvalg(l, x) == @@ -368,7 +368,7 @@ AlgebraicFunction(R, F): Exports == Implementation where ialg l == f := univariate(p := first l, retract(x := second l)@K) - degree denom f > 0 => error "roofOf: variable appears in denom" + positive? degree denom f => error "roofOf: variable appears in denom" inrootof(numer f, x) operator op == |