pullbacks

拉回的行为或结果；撤回。

The act or result of pulling back; a withdrawal.

将摄像机后拉以扩大可见场景的动作。

The act of drawing a camera back to broaden the visible scene.

金融工具价格达到峰值后的回落。

A reduction in the price of a financial instrument after reaching a peak

从边路向远离进攻球门线的位置传出的进攻性传球。

An attacking pass from the wing into a position further from the attacking goal line.

光滑流形之间的光滑映射所对应的流形余切丛之间的映射,在每一点上是对应前推的对偶映射。

The map between cotangent bundles of manifolds corresponding to a smooth map between smooth manifolds, which at each point is the dual map to the corresponding pushforward.

余跨的极限:笛卡尔方块或“拉回方块”。

The limit of a cospan: a Cartesian square or “pullback square”.

在笛卡尔方块中,与给定的收敛态射正相对的发散态射,称为沿该收敛态射的拉回。(该拉回称为给定态射的拉回。)

Within a Cartesian square (which has a pair of divergent morphisms and a pair of convergent morphisms) the divergent morphism which is directly opposite to a given one of the convergent morphisms, said to be “along” the convergent morphism which is between that pair of opposite morphisms. (The pullback is said to be “of” the given morphism.)

踢踏舞中向后跳并以脚掌着地的动作。

A move in tap dance involving a backward jump landing on the balls of the feet.