Suppose that I have already found the eps for all density. I applied the methodology from here http://ijiset.com/v1s4/IJISET_V1_I4_48.pdf
If you don't mind, please open page 5 and see at Proposed Algorithm section. At step 10.1, the paper tells us to calculate the number of objects in eps-neighborhood.
What does eps represent actually? It is a radius to draw a circle right? So, why the radius is so small, smaller than distances between two objects? If so, the MinPts will be 0 forever.
Yes, if used with Euclidean distance, then it is a radius.
It is not infinitely small (it does not tend to 0). It's just supposed to be small compared to the data set extends, but the authors could have named it "r" instead.
Use the original paper to understand the algorithm, not some indian journal variant of it.