Zeros of quadratic functionals on non-separable spaces
Tom 100 / 2004
Colloquium Mathematicum 100 (2004), 141-147
MSC: Primary 46B28; Secondary 46B04.
DOI: 10.4064/cm100-1-13
Streszczenie
We construct non-separable subspaces in the kernel of every quadratic functional on some classes of complex and real Banach spaces.