First of all, the metric I am referring to is this one:(adsbygoogle = window.adsbygoogle || []).push({});

ds^{2}= -c^{2}dt^{2}+ dl^{2}+ (k^{2}+ l^{2})(dᶿ^{2}+ sin^{2}(ᶿ)dø^{2})

where k is the radius of the throat of the wormhole. (sorry for the small Greek letters)

Now I have two questions about this solution to Einstein's equations:

1. What does the coordinate l represent? All I know is that its domain is all real numbers and negative values of l apparently represents another universe.

2. When this solution was derived, did the equations include the cosmological constant or was that just left out?

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# Questions about the traversable wormhole metric

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