Evgenij-Gr

## DS-ND-conferences-2021.md

      
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    January

Conference name

Website: address
Where:  city, country
When:  Month Days, Year

  
## DS-ND-conferences-2020.md

      
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              Created
              February 13, 2020 18:50
            
              
                Conferences in 2020
              
          
    January

Conference name

Website: address
Where:  city, country
When:  Month Days, Year

  
## DS-ND-conferences-2019.md

      
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              February 26, 2019 04:58
            
              
                European dynamical systems, nonlinear dynamics and ODEs conferences in 2019
              
          
    January

Topological methods in dynamics and related topics

Website: https://nnov.hse.ru/en/bipm/topmethods/2019/
Where:  Nizhny Novgorod, Russia
When:  January 3-6, 2019

  
## DS-ND-conferences-2018.md

      
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              May 22, 2018 10:46
            
              
                Dynamical systems, nonlinear dynamics and ODEs conferences in 2018
              
          
    Table of Contents


January

Conference name


February

Современные проблемы математики и ее приложений Международная (49-я Всероссийская) молодежная школа-конференция


March
Critical Transitions in Complex Systems: Mathematical theory and applications, 4th Workshop and Winter School


## equivariance-check.ipynb

      
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              Created
              March 6, 2017 22:00
            
              
                Simple demonstration of using SymPy for checking dynamical systems equivariance conditions in simple examples
              
          
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## DS-ND-conferences-2017.md

      
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              July 26, 2017 17:07
            
              
                Dynamical systems, nonlinear dynamics and ODEs conferences in 2017
              
          
    Table of Contents


July 2017

Equadiff 2017


August 2017

The 8th International Conference on Differential and Functional Differential Equations Moscow, Russia, August 13–20, 2017
3rd INTERNATIONAL CONFERENCE ON SYMMETRIES, DIFFERENTIAL EQUATIONS AND APPLICATIONS 14-17 AUGUST 2017 Centenary of Noether's Theorem


September 2017
CRITICS Summer meeting 2017


## pcolormesh.ipynb

      
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              Created
              November 21, 2016 05:43
            
              
                Describes in what order fill matrix to correctly use with pcolormesh
              
          
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## Rodrigues_sequence
Первое преобразование

$$ e'_{x/y/z} = {\rm Rodr}_{\langle \phi_1, e_z \rangle} (e_{x/y/z}) $$
$$ v' = {\rm Rodr}_{\langle \phi_1, e_z \rangle} (v) $$

Второе преобразование

$$ e''_{x/y/z} = {\rm Rodr}_{\langle \phi_2, e'_y \rangle} (e'_{x/y/z}) $$
$$ v'' = {\rm Rodr}_{\langle \phi_2, e'_y \rangle} (v') $$

## np_plots.py
import numpy as np
import math as m

# calculates point of parameterized curve
# accepts parameterization interval, parameterization function
# and discretization step
def ezLinePlot(Boundaries, CurveParametrization, Steps):
    left, right = Boundaries
    curveParamPoints = np.linspace(left, right, Steps)
    curvePoints = [CurveParametrization(t) for t in curveParamPoints]

## simple_checks.py
import numpy as np
import math as m

# we assume that line is parameterized by values from segment [0, 1] placed uniformly
# startPoint, endPoint - 2D point
# nSteps - integer value
# vectorField - function that takes 2D point and return 2D vector
def checkStraightLineForTransversality(startPoint, endPoint, nSteps, vectorField):
	tangentVector = endPoint - startPoint
	normalVector = np.array([-tangentVector[1], tangentVector[0]])
	Первое преобразование

	$$ e'_{x/y/z} = {\rm Rodr}_{\langle \phi_1, e_z \rangle} (e_{x/y/z}) $$
	$$ v' = {\rm Rodr}_{\langle \phi_1, e_z \rangle} (v) $$

	Второе преобразование

	$$ e''_{x/y/z} = {\rm Rodr}_{\langle \phi_2, e'_y \rangle} (e'_{x/y/z}) $$
	$$ v'' = {\rm Rodr}_{\langle \phi_2, e'_y \rangle} (v') $$
	import numpy as np
	import math as m

	# calculates point of parameterized curve
	# accepts parameterization interval, parameterization function
	# and discretization step
	def ezLinePlot(Boundaries, CurveParametrization, Steps):
	left, right = Boundaries
	curveParamPoints = np.linspace(left, right, Steps)
	curvePoints = [CurveParametrization(t) for t in curveParamPoints]
	import numpy as np
	import math as m

	# we assume that line is parameterized by values from segment [0, 1] placed uniformly
	# startPoint, endPoint - 2D point
	# nSteps - integer value
	# vectorField - function that takes 2D point and return 2D vector
	def checkStraightLineForTransversality(startPoint, endPoint, nSteps, vectorField):
	tangentVector = endPoint - startPoint
	normalVector = np.array([-tangentVector[1], tangentVector[0]])