# Linear vs Contravariant - What's the difference?

linear | contravariant |

## As adjectives the difference between linear and contravariant

is that linear is having the form of a line; straight while contravariant is (category theory|of a functor) which reverses composition.

## As a noun contravariant is

a bihomogeneous polynomial in dual variables of x'', ''y'', and the coefficients of some homogeneous form in ''x'', ''y , that is invariant under some group of linear transformations.

# linear

## English

(wikipedia linear)

### Adjective

(en adjective)
• Having the form of a line; straight.
• Of or relating to lines.
• Made in a step-by-step, logical manner.
• (botany, of leaves) Long and narrow, with nearly parallel sides.
• (mathematics) Of or relating to a class of polynomial of the form $y = ax + b$.
• (physics) A type of length measurement involving only one spatial dimension (as opposed to area or volume).
• ### See also

* quadratic * cubic * quartic * quintic * linear algebra * areal

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# contravariant

## English

### Adjective

(-)
• (category theory, of a functor) which reverses composition
• (computing, programming) Using or relating to contravariance.
• ### Noun

(en noun)
• A bihomogeneous polynomial in dual variables of x'', ''y'', ... and the coefficients of some homogeneous form in ''x'', ''y , ... that is invariant under some group of linear transformations.