Pith. sign in

REVIEW

Circles of Apollonius two ways

Not yet reviewed by Pith; the record is open.

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2210.13288 v1 pith:XK7ENMWG submitted 2022-10-24 math.AG math.CO

classification math.AGmath.CO
keywords circlesapolloniuseightenrichedenumerativegeometrynumberproblem
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

Because the problem of Apollonius is generally considered over the reals, it suffers from variance of number: there are at most eight circles simultaneously tangent to a given trio of circles, but some configurations have fewer than eight tangent circles. This issue arises over other non-closed fields as well. Using the tools of enriched enumerative geometry, we give two different ways to count the circles of Apollonius such that invariance of number holds over any field of characteristic not 2. We also pose the geometricity problem for local indices in enriched enumerative geometry.

Discussion (0). Sign in to comment.

Pith tools