# The many faces of projective objects

In mathematics and physics, there is quite a long list of objects which are, in some way, related to each other. It can be useful to keep down a little list of those various types of objects and their relationships.

## Projective space

Probably the oldest such objects are the ones related to projective geometry.

## Plücker coordinates

## Quaternions

Quaternions are defined as an algebra over a $4$-dimensional vector space

## Differential forms

## Grassmann algebras

## Spinors

## Twistors

Last updated :

*2021-11-18 14:04:56*

Tags :
mathematics