Projective geometry and octonions and complex numbers
Soldering electronics
Transistors, resistors, capacitors, coils, and diodes
Linear Algebra
Statistical Calculus (step functions and Ito integration)
Exponential function
Gamma function
Table saws
Screws vs nails
You want a nice little ball of knowledge with a comparatively large surface that you can attach stuff to. And then you also know what kind of expert to get.
Gravity
Halting problem
Travelling salesman & NP-hard
CRUD
Gödel's incompleteness theorem
Kolmogorov complexity
Series by Richard C. Waters
Simple finite groups
Projective geometry and octonions and complex numbers
Soldering electronics
Transistors, resistors, capacitors, coils, and diodes
Linear Algebra
Statistical Calculus (step functions and Ito integration)
Exponential function
Gamma function
Table saws
Screws vs nails
You want a nice little ball of knowledge with a comparatively large surface that you can attach stuff to. And then you also know what kind of expert to get.