> Because it is such an applied field, of course you want actual numbers That's why you're an engineer and not a mathematician ;) Because, no, _I_ do not want

> Because it is such an applied field, of course you want actual numbers That's why you're an engineer and not a mathematician ;) Because, no, _I_ do not want numbers if I can avoid them. Proofing that something has one (and exactly one) solution is (for example) way more interesting than actually computing the result - this is that boring that even computers can do (some of) the work for us.