Even the validity of the square area calculation must have been found out one day under the given cosmos.

Much more of the circle area calculation and of the differential and integral calculas. At first, all the found-out-invariably, then many presumptions to be proved up by the many found-outs under the given. We cannot give any change to the given cosmos under which we have been just finding out fixedly many calculations which we cannot prove, while intuitionally being clear. We cannot warp the cosmos. An arbitrarily curved surface is also grasped among the given cosmos co-ordinates. Like the surface of the earth.
　Copier here is just a volunteer help to the last. He does not steal anything. No name, no salary for ever. But even a reporter help himself has to know things to be a reporter.