A simple construction of exponential bases in L2 of the union of several intervals
1995 ◽
Vol 38
(1)
◽
pp. 171-177
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Keyword(s):
It is proved that every space L2 (I1, ∪ I2), where I1 and I2 are finite intervals, has a Riesz basis of complex exponentials , {λk} a sequence of real numbers. A partial result for the corresponding problem for n≧3 finite intervals is also obtained.
Keyword(s):
1969 ◽
Vol 6
(03)
◽
pp. 478-492
◽
2013 ◽