Steiner inellipse
E1493311
UNEXPLORED
The Steiner inellipse is a special ellipse inscribed in a triangle that is tangent to the triangle’s sides at their midpoints and has the maximum possible area among all such inscribed ellipses.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Steiner inellipse canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T21610207 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Steiner inellipse Context triple: [Jakob Steiner, notableWork, Steiner inellipse]
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A.
Miquel circle
The Miquel circle is a notable circle in geometry that passes through the three points where the circumcircles of the triangles formed by choosing three vertices of a quadrilateral intersect.
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B.
Soddy circle
A Soddy circle is one of the circles in a configuration of four mutually tangent circles, central to the geometric problem described by Descartes' circle theorem.
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C.
Kiepert
Kiepert is a character in Bertolt Brecht’s early play "Drums in the Night," which explores post–World War I German society and disillusionment.
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D.
nine-point circle
The nine-point circle is a fundamental circle in triangle geometry that passes through nine significant points of a triangle, including the midpoints of its sides and the feet of its altitudes.
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E.
Poncelet polygon
A Poncelet polygon is a cyclic polygon that can be simultaneously inscribed in one conic and circumscribed about another, illustrating Poncelet’s porism in projective geometry.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Steiner inellipse Target entity description: The Steiner inellipse is a special ellipse inscribed in a triangle that is tangent to the triangle’s sides at their midpoints and has the maximum possible area among all such inscribed ellipses.
-
A.
Miquel circle
The Miquel circle is a notable circle in geometry that passes through the three points where the circumcircles of the triangles formed by choosing three vertices of a quadrilateral intersect.
-
B.
Soddy circle
A Soddy circle is one of the circles in a configuration of four mutually tangent circles, central to the geometric problem described by Descartes' circle theorem.
-
C.
Kiepert
Kiepert is a character in Bertolt Brecht’s early play "Drums in the Night," which explores post–World War I German society and disillusionment.
-
D.
nine-point circle
The nine-point circle is a fundamental circle in triangle geometry that passes through nine significant points of a triangle, including the midpoints of its sides and the feet of its altitudes.
-
E.
Poncelet polygon
A Poncelet polygon is a cyclic polygon that can be simultaneously inscribed in one conic and circumscribed about another, illustrating Poncelet’s porism in projective geometry.
- F. None of above. chosen
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.