FiniteDifferenceLib.py
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	#!/usr/bin/env python3
	# -- coding: utf-8 --
	"""
	Created on Thu Jan 30

	@author: Simone Deparis
	"""

	import numpy as np

	# This function just provides a line to compare the convergence in a log-log plot.
	def sampleConvergence(h,order,ref) :
	# computes a pseudo order of convergence on h
	# ref is a reference maximum value
	return h*order (ref/np.max(np.abs(h))**order)