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Equivariant principal bundles for G–actions and G–connections

100%

Biswas I., Kannan S. S., Nagaraj D. S.

Complex Manifolds

2015

tom 2

nr 1

Given a complex manifold M equipped with an action of a group G, and a holomorphic principal H–bundle EH on M, we introduce the notion of a connection on EH along the action of G, which is called a G–connection. We show some relationship between the condition that EH admits a G–equivariant structure and the condition that EH admits a (flat) G–connection. The cases of bundles on homogeneous spaces and smooth toric varieties are discussed.

Motion planning, equivalence, infinite dimensional systems

75%

Rouchon P.

International Journal of Applied Mathematics and Computer Science

2001

tom 11

nr 1

165-188

Motion planning, i.e., steering a system from one state to another, is a basic question in automatic control. For a certain class of systems described by ordinary differential equations and called flat systems (Fliess et al. 1995; 1999a), motion planning admits simple and explicit solutions. This stems from an explicit description of the trajectories by an arbitrary time function, the flat output, and a finite number of its time derivatives. Such explicit descriptions are related to old problems on Monge equations and equivalence investigated by Hilbert and Cartan. The study of several examples (the car with -trailers and the non-holonomic snake, pendulums in series and the heavy chain, the heat equation and the Euler-Bernoulli flexible beam) indicates that the notion of flatness and its underlying explicit description can be extended to infinite-dimensional systems. As in the finite-dimensional case, this property yields simple motion planning algorithms via operators of compact support. For the non-holonomic snake, such operators involve non-linear delays. For the heavy chain, they are defined via distributed delays. For heat and Euler-Bernoulli systems, their supports are reduced to a point and their definition domain coincides with the set of Gevrey functions of order 2.

Ograniczanie wyników

1 Complex Manifolds

1 International Journal of Applied Mathematics and Computer Science

1 Biswas I.

1 Kannan S. S.

1 Nagaraj D. S.

1 Rouchon P.

1 2015

1 2001

Wyniki wyszukiwania

Equivariant principal bundles for G–actions and G–connections

Motion planning, equivalence, infinite dimensional systems