A circle with a dot at its centre (Unicode U+2299 ) indicates a vector pointing out of the front of the diagram, toward the viewer.

A circle with a cross inscribed in it (Unicode U+2297 ) indicates a vector pointing into and behind the diagram.

The gradient of at a point is a vector pointing in the direction of the steepest slope or grade at that point.

A normal to a surface does not have a unique direction; the vector pointing in the opposite direction of a surface normal is also a surface normal.

For example, a (spacelike) sphere in Minkowski space has lightlike vectors pointing inward and outward along the radial direction.

This means that at some junction between two pieces will have normal vectors pointing in opposite directions.

Again the parameters blinked, displaying a graphic of the new solar system, with vectors pointing from their position to a planet inward toward the sun from where they were.

An angular displacement is considered to be a vector, pointing along the axis, of magnitude equal to that of .

Within planetary atmospheres (including the Earth's), the pressure gradient is a vector pointing roughly downwards, because the pressure changes most rapidly vertically, increasing downwards.

Nigel calls up the color-coded overview and sees the blips converging, integrated vectors all pointing toward him now-no, no, near him, east a few hundred meters.