- mathematics, the
covariant derivative is a way of
specifying a
derivative along tangent vectors of a manifold. Alternatively, the
covariant derivative is...
- Look up covariance or
covariant in Wiktionary, the free dictionary. In
mathematics and physics,
covariance is a
measure of how much two
variables change...
- is a
subtype of "list of Animal"
because the list type
constructor is
covariant. This
means that the
subtyping relation of the
simple types is preserved...
- and a
covariant vector is a list of
numbers that
transforms in the same way.
Contravariant vectors are
often just
called vectors and
covariant vectors...
- In physics, a
covariant transformation is a rule that
specifies how
certain entities, such as
vectors or tensors,
change under a
change of basis. The...
- In object-oriented programming, a
covariant return type of a
method is one that can be
replaced by a "narrower" type when the
method is
overridden in...
- In the
mathematical field of
differential geometry, the
exterior covariant derivative is an
extension of the
notion of
exterior derivative to the setting...
- In physics, the
gauge covariant derivative is a
means of
expressing how
fields vary from
place to place, in a way that
respects how the
coordinate systems...
- are used to
label a
variable object as
covariant (lower index),
contravariant (upper index), or
mixed covariant and
contravariant (having both
upper and...
-
called covariant functors in
order to
distinguish them from
contravariant ones. Note that one can also
define a
contravariant functor as a
covariant functor...
