This requires an algorithm: students are taught to stack one number atop another and multiply each digit of the bottom number ...

This is the last of Peano's axioms. Along with succ_inj (injectivity of the successor) which we proved in the previous level, it is an important property that characterizes the structure of natural ...

After a decade working in software design, I feel zero-to-one design work is categorically a different challenge. There's no ...