return the variable ordering defined in a quantifier-free formula - Maple Help

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RegularChains[SemiAlgebraicSetTools][VariableOrdering] - return the variable ordering defined in a quantifier-free formula

Calling Sequence

VariableOrdering(qff)

Parameters

qff

-

a quantifier-free formula

Description

• 

The command VariableOrdering(qff) returns the variable ordering (in decreasing order) defined in quantifier-free formula qff.

Examples

withRegularChains:

withParametricSystemTools:

withSemiAlgebraicSetTools:

R:=PolynomialRingx,d,a,b,c

R:=polynomial_ring

(1)

Determine under which conditions on a,b,c,d the equation x2+d=0 has 2 distinct real solutions provided that d satisfies ad2+bd+c=0.

F:=x2+d,ad2+bd+c

F:=x2+d,ad2+bd+c

(2)

N:=

N:=

(3)

P:=

P:=

(4)

H:=

H:=

(5)

rrc:=RealRootClassificationF,N,P,H,4,2,R

rrc:=regular_semi_algebraic_set,border_polynomial

(6)

rsas:=rrc11

rsas:=regular_semi_algebraic_set

(7)

rbx:=RepresentingBoxrsas,R

rbx:=parametric_box

(8)

qff:=RepresentingQuantifierFreeFormularbx

qff:=quantifier_free_formula

(9)

VariableOrderingqff

c,d,a,b

(10)

See Also

DisplayParametricBox, IsParametricBox, RealRootClassification , RegularChains, RepresentingBox, RepresentingChain, RepresentingQuantifierFreeFormula, RepresentingRootIndex, VariableOrdering


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