Timeline for Dual norm of a max function [closed]
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| Nov 19, 2019 at 10:34 | history | closed |
YCor user44191 Mateusz Kwaśnicki Alex M. Max Horn |
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| Nov 14, 2019 at 13:04 | comment | added | ARG | You are essentially looking at the norm of a subspace $P$ of $\ell^\infty$ (its a plane inside the 3-dimensional space with the max-norm $\ell^3_\infty$). If you have a look at the section on duals of quotients in Rudin, you will see, that the dual of a subspace is (isomorphic to) the a quotient, here $\ell^3_1 / P^\perp$ (with the quotient norm). It should be a nice exercise for you to figure out exactly, what this gives. | |
| Nov 12, 2019 at 2:54 | history | edited | Iosif Pinelis |
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| Nov 12, 2019 at 0:27 | answer | added | Iosif Pinelis | timeline score: 2 | |
| Nov 12, 2019 at 0:00 | review | Close votes | |||
| Nov 19, 2019 at 10:34 | |||||
| Nov 11, 2019 at 23:40 | history | edited | YCor | CC BY-SA 4.0 |
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| Nov 11, 2019 at 23:40 | history | edited | Troy W. |
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| Nov 11, 2019 at 23:35 | review | First posts | |||
| Nov 11, 2019 at 23:47 | |||||
| Nov 11, 2019 at 23:33 | history | asked | Troy W. | CC BY-SA 4.0 |