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1. Projectile: A projectile is an object that is propelled by the application of an external force and then moves freely under the influence of gravity and air resistance. Although any objects in motion through space are projectiles, they are commonly found ... (Physics) [100%] 2023-07-25 [Projectiles] [Ballistics]...
2. Projectile: A projectile is any object propelled through space by the exertion of a force that ceases after launch. In a general sense, even a football or baseball may be considered a projectile. It can cause damage (injury, property damage) to ... [100%] 2023-02-04
3. Projectile: A projectile is an object that is propelled by the application of an external force and then moves freely under the influence of gravity and air resistance. Although any objects in motion through space are projectiles, they are commonly found ... (Object propelled through the air) [100%] 2024-06-06 [Projectiles] [Ammunition]...
4. Projectile motion: Projectile motion is a form of motion experienced by an object or particle (a projectile) that is projected in a gravitational field, such as from Earth's surface, and moves along a curved path under the action of gravity only ... (Physics) [70%] 2023-07-29 [Mechanics]
5. M107 projectile: The M107 is a 155 mm high explosive projectile used by many countries. It is a bursting round with fragmentation and blast effects. (High explosive artillery round) [70%] 2023-12-12 [155 mm artillery] [155mm artillery shells]...
6. Projectile point: In archaeological terminology, a projectile point is an object that was hafted to a weapon that was capable of being thrown or projected, such as a javelin, dart, or arrow. They are thus different from weapons presumed to have been ... (Engineering) [70%] 2023-12-13 [Projectile points] [Lithics]...
7. Projectile point: In archaeological terminology, a projectile point is an object that was hafted to a weapon that was capable of being thrown or projected, such as a javelin, dart, or arrow. They are thus different from weapons presumed to have been ... (Primitive weapon component) [70%] 2024-06-09 [Projectile points] [Lithics]...
8. Volume projections: Volume projections enable marketers to forecast sales by sampling customer intentions through surveys and market studies. By estimating how many customers will try a new product, and how often they’ll make repeat purchases, marketers can establish the basis for ... (Finance) [64%] 2023-12-14 [Market research]
9. Projective plane: two-dimensional projective space An incidence structure $\pi = \{ {\mathcal P} , {\mathcal L} , I \}$. The elements of the set $ {\mathcal P} $ are called points, the elements of the set $ {\mathcal L} $ are called (straight) lines and $ I $ is an incidence relation. (Mathematics) [62%] 2023-12-13
10. Projective algebra: in the narrow sense An algebra of points on a projective line; projectively-invariant constructions for defining addition and multiplication of points on a projective line $ l $, lying in a projective plane $ \pi $ for which the Desargues assumption holds. These ... (Mathematics) [62%] 2023-10-25
11. Projective representation: of a group $ G $ A homomorphism of this group into the group $ \mathop{\rm PGL} ( V ) $ of projective transformations of the projective space $ P ( V ) $ associated to a vector space $ V $ over a field $ k $. With each projective representation $ \phi ... (Mathematics) [62%] 2023-10-23
12. Projective normal: A generalization of the concept of a normal in metric geometry. Distinct from the latter, where a normal is totally determined by the tangent plane to a surface (i.e. (Mathematics) [62%] 2023-12-13
13. Projective covering: of a left module $M$ over a ring $R$ The dual notion to that of an injective envelope or injective hull. Let $R$ be an associative ring with unit element, $M$ a left module over $R$. (Mathematics) [62%] 2023-12-03
14. Projective geometry: In mathematics, projective geometry is the study of geometric properties that are invariant with respect to projective transformations. This means that, compared to elementary Euclidean geometry, projective geometry has a different setting, projective space, and a selective set of basic ... (Type of geometry) [62%] 2023-01-08 [Projective geometry] [Geometry]...
15. Projective deformation: An extension to projective geometry of the concept of deformation (superposition) in the metric theory of surfaces, given by G. Fubini in 1916 (a generalization of this concept to the geometry of any group of transformations was obtained by E. (Mathematics) [62%] 2023-06-04
16. Projective connection: In differential geometry, a projective connection is a type of Cartan connection on a differentiable manifold. The structure of a projective connection is modeled on the geometry of projective space, rather than the affine space corresponding to an affine connection. [62%] 2024-01-08 [Differential geometry] [Connection (mathematics)]...
17. Projective space: In mathematics, the concept of a projective space originated from the visual effect of perspective, where parallel lines seem to meet at infinity. A projective space may thus be viewed as the extension of a Euclidean space, or, more generally ... (Completion of the usual space with "points at infinity") [62%] 2023-12-13 [Projective geometry]
18. Projective hierarchy: In the mathematical field of descriptive set theory, a subset \displaystyle{ A }[/math] of a Polish space \displaystyle{ X }[/math] is projective if it is \displaystyle{ \boldsymbol{\Sigma}^1_n }[/math] for some positive integer \displaystyle{ n }[/math]. Here \displaystyle{ A ... (Descriptive set theory concept) [62%] 2022-12-05 [Descriptive set theory]
19. Projective group: in $n$ variables over a skew-field $K$ The group $\def\PGL{ {\rm PGL}}\PGL_n(K)$ of transformations of the $(n-1)$-dimensional projective space $P^{n-1}(K)$ induced by the linear transformations of $K^n$. There is a ... (Mathematics) [62%] 2023-12-12
20. Projective transformation: A one-to-one mapping $ F $ of a projective space $ \Pi _ {n} $ onto itself preserving the order relation in the partially ordered (by inclusion) set of all subspaces of $ \Pi _ {n} $, that is, a mapping of $ \Pi _ ... (Mathematics) [62%] 2023-08-30