realrank(F,Range=>(a,b))
realrank(F,Range=>[a,b])
If the real rank of $F_u(x,y)$ is not constant over the interval, then an error message will be returned. The default value is (-infinity,infinity).
The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/CoincidentRootLoci/documentation.m2:289:0.