mathematics Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics ...

, the James embedding is an embedding of a real, complex, or hyperbolic

projective space In mathematics, the concept of a projective space originated from the visual effect of perspective, where parallel lines seem to meet ''at infinity''. A projective space may thus be viewed as the extension of a Euclidean space, or, more generally ...

into a sphere, introduced by

Ioan James Ioan Mackenzie James FRS (born 23 May 1928) is a British mathematician working in the field of topology, particularly in homotopy theory. Biography James was born in Croydon, Surrey, England, and was educated at St Paul's School, London and ...

References

Algebraic topology {{topology-stub