Affordable housing’s great unsolved problems
Mathematics has long had famous ‘unsolved problems.’ Perhaps the most famous is Fermat’s Last Theorem, which Fermat boasted (at least to himself) that he’d knocked off in 1630:
“I have discovered a truly marvelous proof of this, which this margin is too narrow to contain.”
In fact, it resisted proof for 365 more years. The tantalizing four-color [...]
