Spherics (sometimes spelled sphaerics or sphaerica) is a term used in the

history of mathematics The history of mathematics deals with the origin of discoveries in mathematics and the History of mathematical notation, mathematical methods and notation of the past. Before the modern age and the worldwide spread of knowledge, written examples ...

for historical works on

spherical geometry 300px, A sphere with a spherical triangle on it. Spherical geometry or spherics () is the geometry of the two-dimensional surface of a sphere or the -dimensional surface of higher dimensional spheres. Long studied for its practical applicati ...

, exemplified by the ''

Spherics Spherics (sometimes spelled sphaerics or sphaerica) is a term used in the history of mathematics for historical works on spherical geometry, exemplified by the ''Theodosius' Spherics, Spherics'' ( ), a treatise by the Greek mathematics, Hellenistic ...

'' ( ), a treatise by the Hellenistic mathematician

Theodosius Theodosius ( Latinized from the Greek "Θεοδόσιος", Theodosios, "given by god") is a given name. It may take the form Teodósio, Teodosie, Teodosije etc. Theodosia is a feminine version of the name. Emperors of ancient Rome and Byzantium ...

(2nd or early 1st century BC), and another treatise of the same title by

Menelaus of Alexandria Menelaus of Alexandria (; , ''Menelaos ho Alexandreus''; c. 70 – 140 CE) was a Greek mathematician and astronomer, the first to recognize geodesics on a curved surface as natural analogs of straight lines. Life and works Although very li ...

().

References

Spherical geometry Classical geometry Spherical astronomy Greek mathematics {{geometry-stub