And it may be understood in a third equivalent way: as saying that each is sufficient for the other.

I see no equivalent way to shield myself from Government decisions to cut benefits.

The Lie derivative may be defined in several equivalent ways.

The delta distribution can also be defined in a number of equivalent ways.

Equations can be expressed in these equivalent and alternative ways.

There are a number of equivalent ways that this idea can be made precise.

There may be several equivalent ways of describing this process.

It turns out that there are a number of equivalent ways in which this can be done.

Yet there was no equivalent way to tell him she considered him the most important person in the world.

An equivalent way of writing conditions 3 and 4 is as follows: