## Twisted sums of sequence spaces and the three space problem.(English)Zbl 0424.46004

### MSC:

 46A16 Not locally convex spaces (metrizable topological linear spaces, locally bounded spaces, quasi-Banach spaces, etc.) 46A04 Locally convex Fréchet spaces and (DF)-spaces 46A45 Sequence spaces (including Köthe sequence spaces) 46B20 Geometry and structure of normed linear spaces

Zbl 0314.46015
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### References:

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