A remark on the equation $y'' + \phi y' + \psi y = 0$

On the Equation Y

On a Remark by Y. Namikawa

The aim of the present paper is on the one hand to produce examples supporting the conclusion of Y. Namikawa in Remark 2.8 of [31] and improving considerations of Example 1.11 of the same paper. On the other hand, it is intended to give a geometric interpretation of the rigidity properties of some trees of exceptional rational curves, as observed by Namikawa, which can be obtained by factorizin...

0 Y 0 0

Characteristics of strained GaAs 1 − y Sb y ( 0 . 16 y 0 . 69 ) quantum wells on InP substrates

Pseudomorphic GaAs1−ySby quantum wells with 0.16 y 0.69 on (0 0 1) InP substrates have been grown using metal–organic chemical vapour deposition. High resolution x-ray diffraction and transmission electron microscopy analysis are used to quantify the layer thicknesses and compositions. Studies of the optical properties suggest that a transition from type-I to type-II band alignment occurs at an...

ON THE DIOPHANTINE EQUATION x + y = 2pz

We show, if p is prime, that the equation xn + yn = 2pz2 has no solutions in coprime integers x and y with |xy| ≥ 1 and n > p132p , and, if p 6= 7, the equation xn + yn = pz2 has no solutions in coprime integers x and y with |xy| ≥ 1 and n > p12p .