Desmic system

In projective geometry, a desmic system is a set of three tetrahedra in 3-dimensional projective space, such that any two are desmic,. It was introduced by Stephanos (1879). The three tetrahedra of a desmic system are contained in a pencil of quartic surfaces. The name


In projective geometry, a desmic system is a set of three tetrahedra in 3-dimensional projective space, such that any two are desmic,. It was introduced by Stephanos (1879). The three tetrahedra of a desmic system are contained in a pencil of quartic surfaces. The name "desmic" comes from the Greek word δεσμός, meaning band or chain, referring to the pencil of quartics.
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