[aronpye]

Second order differential equations, they seem to pop up everywhere. Particularly relevant to classical mechanics. Also gives rise to the metal model of second order consequences of actions.

The concept of bootstrapping. How to start something from nothing that eventually becomes self sustaining.

Compound interest and exponential growth. Particularly relevant to investing as well as the personal ‘growth’ mentality. The natural exponent that was discovered from compound interest is everywhere in mathematics and physics.