Count Dracula wrote: >quasi wrote: >> >> Note: "mutatis mutandi" is not a valid principle of >> mathematical reasoning. > >The use of the Latin expression "mutatis mutandis", meaning >"necessary changes having been made", in a mathematical >argument implies neither that the author thinks he is >invoking a mathematical principle nor that the argument is >correct or incorrect. If you have an objection to the use >of the phrase in the current context, maybe you could explain >it a little better.
Here is an excerpt from Marcel Luttgens' original post:
>>> ================================================== >>> As S and S' contain prime numbers, the even number >>> is necessarily the sum of two primes. >>> >>> This applies mutatis mutandi to any even integer. >>> >>> Conclusion: >>> >>> Every even integer greater than 4 can be expressed >>> as the sum of two primes. >>> ==================================================
It looks to me like Luttgens is using the phrase
as a form of reasoning.
Hence my response that (whatever it is) it's certainly not a valid principle of mathematical reasoning.