We show that the sum of Betti numbers of the intersections of two real flag manifolds in a complex flag manifold consisting of sequences of complex subspaces in a complex vector space are invariants of such real flag manifolds. We also show that similar claims hold for the intersections of two quaternionic flag manifolds and the intersections of real and quaternionic flag manifolds.
We study the $L^\infty$-decay estimate and the asymptotic behavior of solutions to dissipative nonlinear Schrödinger equations. In some known results, Kita-Nakamura established an $L^{\infty}$-decay result under a weak dissipative condition for nonlinear power $p \gt 2.686$. In this paper, we extend the lower bound of the admissible range to $p \gt 5/2$, still under weak dissipation and with small initial data in $H^2$ satisfying $x^2 u_0 \in L^2$. Our result also contrasts with the work of Jin-Jin-Li, Chinese mathematicians, who treated the same problem under a strong dissipative condition and removed the size restriction on the initial data. Notably, we have solved the problem of extending the nonlinear power $p$ range for the modified scattering and decay estimates without the strong dissipative condition.
We consider the Cauchy problem for the derivative fractional cubic nonlinear Schrödinger equation \[ \begin{cases} \partial_{t}u-\dfrac{1}{\alpha}\left\vert \partial_{x}\right\vert ^{\alpha}u=i\lambda\partial_{x}(\left\vert u\right\vert ^{2}u), & t\gt 0,~ x\in\mathbb{R}, \\ u\left( 0,x\right) =u_{0}\left( x\right) , & x\in\mathbb{R}, \end{cases} \] where $\alpha\in\left( 4,5\right) ,$ and $\lambda\in\mathbb{R}.$ We show that the large time asymptotics of solutions has a logarithmic correction in the phase comparing with the corresponding linear case. We develop the method based on the factorization techniques. Also we apply the known results on the $\mathbf{L}^{2}$ - boundedness of pseudodifferential operators.
In this paper, we establish the truncated non-integrated defect relation for meromorphic maps from complete Kähler manifolds into the projective space intersecting hyperlpanes with the distributive constant of these hyperplanes. As an application, the uniqueness theorem is also given.
In this paper, we deal with complete submanifolds immersed in a class of weighted warped products, focusing on co dimension reduction results; more precisely, suitable geometric conditions which guarantee that these submanifolds are contained in slices of such an ambient space. For this, we assume suitable constraints on the BakryEmery-Ricci tensor and the weighted mean curvature vector field which enable us to apply several maximum principles. Applications to weighted minimal submanifolds in the Schwarzschild and Reissner-Nordstro & uml;m spaces with density are also given.
