Category Archives: logic

Logic without truth

Pi is wrong! But so what? It is neither new, nor complicated enough to count as real math! And suggestions that  or  might be even better show that it not clear-cut either. I recently invested sufficient energy into some logical questions to … Continue reading

Posted in category theory, logic, partial functions | Tagged , , | 5 Comments

Gentzen’s consistency proof is more impressive than you expect

I recently said something about the impossibility to prove the consistency of PA, and that Gentzen proved just this in 1936. Because I got critizised quite a bit, and realized that even famous mathematicians get critizized if they dare to … Continue reading

Posted in logic | Tagged , , | 2 Comments