Statements (21)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:Mathematical_surface
gptkb:Quadric_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
|
| 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
|
| https://www.w3.org/2000/01/rdf-schema#label |
Hyperbolic paraboloid
|