Satellites of spherical subgroups
نویسندگان
چکیده
منابع مشابه
On Orbit Closures of Borel Subgroups in Spherical Varieties
Let F be the flag variety of a complex semi-simple group G, let H be an algebraic subgroup of G acting on F with finitely many orbits, and let V be an H-orbit closure in F . Expanding the cohomology class of V in the basis of Schubert classes defines a union V0 of Schubert varieties in F with positive multiplicities. If G is simply-laced, we show that these multiplicites are equal to the same p...
متن کاملOn Orbit Closures of Spherical Subgroups in Flag Varieties
Let F be the ag variety of a complex semi-simple group G, let H be an algebraic subgroup of G acting on F with nitely many orbits, and let V be an H-orbit closure in F. Expanding the cohomology class of V in the basis of Schubert classes deenes a union V 0 of Schubert varieties in F with positive multiplicities. If G is simply-laced, we show that these multiplicites are equal to the same power ...
متن کاملRecovery of Target Response Function for Centre-of-mass Corrections of Spherical Satellites
1. Introduction Accurate centre-of-mass corrections for geodetic spherical satellites are expected to contribute to accurate determination of the scale of the earth, i.e., the scale of terrestrial reference frame and
متن کاملScheduling a constellation of agile earth observation satellites with preemption
In this paper, we consider a scheduling problem for a set of agile Earth observation satellites for scanning different parts of the Earth’s surface. We assume that preemption is allowed to prevent repetitive images and develop four different preemption policies. Scheduling is done for the imaging time window and transmission time domain to the Earth stations as well. The value of each picture ...
متن کاملTIME OPTIMAL SLEW MANEUVER OF MAGNETICALLY ACTUATED LEO SATELLITES
Conventional magnetic attitude control methodologies require several orbital periods to accomplish the required attitude maneuvers due to the existence of an uncontrollable axis, namely the local Earth’s magnetic field vector. Since in some attitude maneuver missions the elapsed time is of critical importance, those time-consuming controllers are not satisfactory and we need a much faster contr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Algebraic Geometry
سال: 2020
ISSN: 2214-2584
DOI: 10.14231/ag-2020-004