Lecture 2

Item 1 
Discussion about Groups. 
Questions about HW1
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Item 2 Techniques: 

Dimensions reduction – logistic equation
Stability (one variable)  – formalism

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Item 3 
Ancient Planetary Model Animations
https://people.sc.fsu.edu/~dduke/models
Universe Models 
Q: Why Copernicus? 

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Item 4 Leslie system
https://en.wikipedia.org/wiki/Leslie_matrix
https://www.populationpyramid.net/world/2016/

Leslie matrix Euler-lotka equation.

https://en.wikipedia.org/wiki/Euler%E2%80%93Lotka_equation

Continuum version.
Maximal Eigenvalue. 

Q: Combine Leslie Model with logistic growth model.