Editing Gravitational singularity (section)

===Conical===

A conical singularity occurs when there is a point where the limit of some [[Diffeomorphism invariance|diffeomorphism invariant]] quantity does not exist or is infinite, in which case spacetime is not smooth at the point of the limit itself. Thus, spacetime looks like a [[Cone (geometry)|cone]] around this point, where the singularity is located at the tip of the cone. The metric can be finite everywhere the [[coordinate system]] is used.

An example of such a conical singularity is a [[cosmic string]] and a [[Schwarzschild metric|Schwarzschild black hole]].<ref>{{cite journal |last1=Copeland |first1=Edmund J. |last2=Myers |first2=Robert C. |last3=Polchinski |first3=Joseph |year=2004 |title=Cosmic F- and D-strings |journal=Journal of High Energy Physics |volume=2004 |issue=6 |page=13 |arxiv=hep-th/0312067 |bibcode=2004JHEP...06..013C |doi=10.1088/1126-6708/2004/06/013 |s2cid=140465}}</ref>