In other words, each world line is a parallel dimension.

The arrival events of an Actor are on its world line.

"He would just as soon settle down here and take over a world line for himself.

The world lines are given a gentle twist and mass will not pass along them.

Why is it that we don't hear more about people wandering in from alternate world lines?

A world line is a special type of curve in spacetime.

It wouldn't matter if the world lines didn't merge every so often."

The action then is proportional to the curvature of the world line.

However, world lines are a general way of representing the course of events.

What he did want to do was to deal with world lines in a plenum, the basic problem of field physics.

"And those alternate worlds each would follow its own world line.

A world line traces out the path of a single point in spacetime.

The condensation must be a side effect from the blurring of the world lines.

His world line is identical with the time axis.

Many first editions and volumes from all over the world line the walls of this library.

This means that the world lines of nearby dust particles are twisting about one another.

"Do you know the theory of multiple world lines?

"The Eschaton has a strong interest in maintaining the integrity of the world line," he had said.

The particle's world line is parameterized by time t seconds.

Thus, the world lines of two anyons cannot cross or merge.

Sometimes, the term world line is loosely used for any curve in spacetime.

It does this by sending a signal along the world line of a person and detecting the echo from the far end.

All curves through point p have a tangent vector, not only world lines.

World lines of particles/objects at constant speed are called geodesics.

Every observer has his own world line; he can't get outside it for a detached viewpoint."