An Elementary Identity with Cotangent Hyperbolic Function
نویسندگان
چکیده
منابع مشابه
An Elementary Product Identity in Polynomial Dynamics
Assuming that this is false, one can choose a subsequence, denoted by u j again, such that ‖u j‖ > j . Let z j := u j/‖u j‖. Then ‖z j‖ = 1, z j is orthogonal to N (I + T ), and z j + T z j = f j/‖u j‖ → 0. As before, it follows that z j → z in H , and passing to the limit in the equation for z j one gets z + T z = 0. Since z is orthogonal to N (I + T ), it follows that z = 0. This is a contrad...
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ژورنال
عنوان ژورنال: Bulletin of Mathematical Sciences and Applications
سال: 2012
ISSN: 2278-9634
DOI: 10.18052/www.scipress.com/bmsa.4.10