FK-AK space
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In functional analysis and related areas of mathematics an FK-AK space or FK-space with the AK property is an FK-space which contains the space of finite sequences and has a Schauder basis.
[edit] Examples and non-examples
- c0 the space of convergent sequences with the supremum norm has the AK property
the absolutely p-summable sequences with the 
norm have the AK property
with the supremum norm does not have the AK property
the 
norm have the AK property
with the supremum norm does not have the AK property[edit] Properties
An FK-AK space E has the property
that is the continuous dual of E is linear isomorphic to the beta dual of E.
FK-AK spaces are separable
