Statements (23)
Predicate | Object |
---|---|
gptkbp:instanceOf |
Quadric surface
Mathematical surface |
gptkbp:commonName |
Saddle surface
|
gptkbp:hasApplication |
gptkb:Mathematics
Architecture Structural engineering |
gptkbp:hasCrossSection |
gptkb:Parabola
gptkb:Hyperbola |
gptkbp:hasEquation |
z = x^2/a^2 - y^2/b^2
|
gptkbp:hasGaussianCurvature |
Negative
|
gptkbp:hasPrincipalCurvatures |
Opposite signs
|
gptkbp:hasSaddlePoint |
At origin
|
https://www.w3.org/2000/01/rdf-schema#label |
Hyperbolic paraboloid
|
gptkbp:isDoublyRuled |
True
|
gptkbp:isNonDevelopable |
True
|
gptkbp:isNonOrientable |
False
|
gptkbp:isRuledSurface |
True
|
gptkbp:isSurfaceOfRevolution |
False
|
gptkbp:symmetry |
Central symmetry
Rotational symmetry about z-axis |
gptkbp:usedInArchitecture |
Yes
|
gptkbp:bfsParent |
gptkb:Quaternion
|
gptkbp:bfsLayer |
6
|