# Area of universe

is it possible to find the area of universe using contour integration,as the limits would
be -infinity to +infinity?
Or even vector calculus can be used to determine area?

Mark44
Mentor
The question doesn't make very much sense, in that since the universe is (at least) three-dimensional, and would therefore have volume. From what little I know about it, I believe that cosmologists fall into two camps: those who believe the universe is finite, and those who believe it is infinite. In the former case, you could make estimates based on assuming it is spheroidal, or elipsoidal, or some other geometric shape. In the latter case, the volume would likely be infinite.

djeitnstine
Gold Member
is it possible to find the area of universe

Are we in a universe or a multiverse(and if so what type)? Question is highly subjective...depends on who you ask

How could you build a 4-volume out of R^2? Should it be conformal?

even if we consider the universe to be 3 dimensional,volume can be found,,as you say,if
we consider universe to be infinite,then consider volume integral,having limits from -infinity
to +infinity--we can still find the volume.

but if the universe is finite,we do not know its particular shape i.e ellipsoidal or circular,
in order to calculate?But since we know the universe is expanding,it has to be finite.

sylas
But since we know the universe is expanding,it has to be finite.

That doesn't follow. An infinite universe can be everywhere expanding.

Mark44
Mentor
even if we consider the universe to be 3 dimensional,volume can be found,,as you say,if
we consider universe to be infinite,then consider volume integral,having limits from -infinity
to +infinity--we can still find the volume.
But to what purpose? If the universe is infinite, how could its volume not be infinite? And just exactly what would you integrate? This seems like a lot of work to get a trivial result.
but if the universe is finite,we do not know its particular shape i.e ellipsoidal or circular,
in order to calculate?But since we know the universe is expanding,it has to be finite.

Dick
Homework Helper
There are not serious questions and there are serious questions. This is one of the latter.

Mark44
Mentor
There are not serious questions and there are serious questions. This is one of the latter.
Dick, did you mean to say former rather than latter?

Dick