The **gender spectrum** at it simplest is a scale of **gender identities** that range between and/or outside of the categories of male and female(see the Single Continuum section on the Models of gender identity page. At it's next most complex it is a two graph with male and female on different axis(see 2D graph theory). At it's next most complex axis are added for all the genders unrelated to male or female(see The N-dimensional gender space). At most complex a scalar field is added to the previous model to represent degree of identification (see Gender Field theory). The term is often used in reference to the concept that there are more than two genders. There is also Gender Graph theory where genders are connected to each other don't nicely form a space