class_docstr: Add homology properties of a scalar field f: R^n --> R associated with
  the geometry built from the VertexBase class
class_docstr_tok: ["Add","homology","properties","of","a","scalar","field","f",":","R^n","--",">","R","associated","with","the","geometry","built","from","the","VertexBase","class"]
docstr: Check whether this vertex is strictly greater than all its
  neighbours.
docstr_tok: ["Check","whether","this","vertex","is","strictly","greater","than","all","its","neighbours","."]
code: def maximiser(self):
      """
      Check whether this vertex is strictly greater than all its
      neighbours.
      """
      if self.check_max:
          self._max = all(self.f > v.f for v in self.nn)
          self.check_max = False
  
      return self._max
  
imports: import collections
  from abc import ABC, abstractmethod
  import numpy
  from scipy._lib._util import MapWrapper
label_desc: Use image node_id 5 for calling the VertexScalarField obj's underlying member method code with example usage: obj.maximiser() and returns: self