# Functors for vertex isolation

- Remove VTXFITCHI2 and Vertex.h class
- Introduction of functional functors like
`ENTRY_WITH_MIN_REL_VALUE_OF`

and`ENTRY_WITH_MAX_REL_VALUE_OF`

to compose for obtaining the vertex variables defined in VertexIsolation.cpp and used in TupleToolVtxIsoln.cpp. You can get the entry in the relation table with the minimum/maximum value of the functors' call. It could be used to evaluate the mass of the candidate that makes the minimum DELTACHI2 with the reference particle (vertex isolation variable). - Dummy tests in
`TestFunctor.cpp`

for the previous functors - Introduction of
`SMALLEST_DELTACHI2`

and`PARTICLE_PROPERTY_SMALLEST_DELTACHI2`

to be used as helper functor to retrieve vertex isolation variables - Improvement of docstrings in
**init**file - Introduction of
`VertexAndConeIsolation`

tool and helper class to derive cone and vertex isolation variables offline

Applications in Analysis!913 (merged) and DaVinci!741 (merged) for the evaluation of vertex isolation variables

Edited by Tommaso Fulghesu