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Cosa (chi) è scalar value - definizione
WIKIMEDIA DISAMBIGUATION PAGE
Scalars; Scalar quantity; Scalar quantities; Scalar (disambiguation); Scalar value
scalar
1. <mathematics> A single number, as opposed to a vector or
matrix of numbers. Thus, for example, "scalar
multiplication" refers to the operation of multiplying one
number (one scalar) by another and is used to contrast this
with "matrix multiplication" etc.
2. <architecture> In a parallel processor or {vector
processor}, the "scalar processor" handles all the sequential
operations - those which cannot be parallelised or vectorised.
See also superscalar.
3. <programming> Any data type that stores a single value
(e.g. a number or Boolean), as opposed to an aggregate
data type that has many elements. A string is regarded as a
scalar in some languages (e.g. Perl) and a vector of
characters in others (e.g. C).
(2002-06-12)
Scalar
·noun In the quaternion analysis, a quantity that has magnitude, but not direction;
- distinguished from a vector, which has both magnitude and direction.
Scalar curvature
SCALAR QUANTITY CONSTRUCTED OUT OF SECOND DERIVATIVES OF A (PSEUDO-)RIEMANNIAN METRIC
Ricci curvature scalar; Ricci scalar; Ricci scalar curvature; Curvature scalar; Curvature Scalar
In the mathematical field of Riemannian geometry, the scalar curvature (or the Ricci scalar) is a measure of the curvature of a Riemannian manifold. To each point on a Riemannian manifold, it assigns a single real number determined by the geometry of the metric near that point.
Wikipedia
Scalar
Scalar may refer to:
- Scalar (mathematics), an element of a field, which is used to define a vector space, usually the field of real numbers
- Scalar (physics), a physical quantity that can be described by a single element of a number field such as a real number
- Lorentz scalar, a quantity in the theory of relativity which is invariant under a Lorentz transformation
- Pseudoscalar, a quantity that behaves like a scalar, except that it changes sign under a parity inversion
- Scalar (computing), any non-composite value
- Scalar boson, in physics, a boson subatomic particle whose spin equals zero
