Sign up ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

Are there uncountably many not Lipschitz equivalent norms on the space of real sequences with only finitely many non-zero elements? Thanks. (If so, how might one find/construct them?) Thanks.

share|cite|improve this question
All norms is going to be hard... However, the $\ell^p$-norms $\|x\| = \left(\sum |x_n|^p\right)^{1/p}$ already provide you with an uncountable family of distinct, inequivalent norms. – t.b. Nov 10 '11 at 18:21
My previous comment was written before you edited the body of your question to clarify the meaning of "equivalent", but it applies to Lipschitz equivalence as well. See Benyamini-Lindenstrauss, chapter 7. – t.b. Nov 10 '11 at 18:29
Thank you, @t.b. – Walter A. Nov 10 '11 at 19:58

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.