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Strengthening of the Kneser theorem on zeros of solutions of the equationu″ +q(t)u = 0 using one functional equation

✍ Scribed by V. Yu. Slyusarchuk

Publisher
Springer
Year
2011
Tongue
English
Weight
106 KB
Volume
62
Category
Article
ISSN
0041-5995

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✍ Naselli, Ornella 📂 Article 📅 1996 🏛 Springer 🌐 English ⚖ 317 KB

We investigate the solution set r of an equation of the type f(t, O(u)(t)) = 0, where 9 is a linear homeomorphism from a topological vector space X onto L' ('I') and f: 2' x R + R is a Carath&dory function. More precisely, we characterize the property of r of intersecting each closed hyperplane of X