Tip: if you want to ask a question and get a satisfactory answer on sites like, say, MathStackExchange, avoid the gate-keepers. They are not there to answer questions in good faith, much less learn anything. They are…
Tip: if you want to ask a question and get a satisfactory answer on sites like, say, MathStackExchange, avoid the gate-keepers. They are not there to answer questions in good faith, much less learn anything. They are…