Statements (16)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:mathematical_concept
|
| gptkbp:alsoKnownAs |
gptkb:Descartes'_theorem
|
| gptkbp:appliesTo |
Curvatures of circles
|
| gptkbp:describes |
Relationship between four mutually tangent circles
|
| gptkbp:field |
gptkb:geometry
|
| gptkbp:form |
(k1 + k2 + k3 + k4)^2 = 2(k1^2 + k2^2 + k3^2 + k4^2)
|
| gptkbp:generalizes |
gptkb:Soddy's_formula
|
| gptkbp:namedAfter |
gptkb:René_Descartes
|
| gptkbp:publishedIn |
gptkb:Correspondence_between_Descartes_and_Princess_Elizabeth_of_Bohemia
|
| gptkbp:relatedTo |
gptkb:Kissing_number_problem
gptkb:Apollonian_gasket Circle packing |
| gptkbp:yearProposed |
1643
|
| gptkbp:bfsParent |
gptkb:Descartes'_theorem
|
| gptkbp:bfsLayer |
7
|
| https://www.w3.org/2000/01/rdf-schema#label |
Kissing circle theorem
|