By Leonor Godinho, José Natário

Unlike many different texts on differential geometry, this textbook additionally deals fascinating functions to geometric mechanics and basic relativity.

The first half is a concise and self-contained creation to the fundamentals of manifolds, differential kinds, metrics and curvature. the second one half reports purposes to mechanics and relativity together with the proofs of the Hawking and Penrose singularity theorems. it may be independently used for one-semester classes in both of those subjects.

The major rules are illustrated and extra constructed through quite a few examples and over three hundred routines. distinct strategies are supplied for plenty of of those routines, making *An creation to Riemannian Geometry* perfect for self-study.

**Read or Download An Introduction to Riemannian Geometry: With Applications to Mechanics and Relativity PDF**

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**Extra resources for An Introduction to Riemannian Geometry: With Applications to Mechanics and Relativity**

**Example text**

3 (1)The space with the usual topology defined by the Euclidean metric is a Hausdorff space and has a countable basis of open sets. 1 are trivially satisfied and we have an atlas for . The maximal atlas that contains this parameterization is usually called the standard differentiable structure on . We can of course consider other atlases. Take, for instance, the atlas defined by the parameterization with for a nonsingular -matrix . It is an easy exercise to show that these two atlases are equivalent.

As in the preceding example, the group multiplication and inversion are differentiable, and so is a Lie group. (5)The map is a differentiable map from to , and the level set is the special orthogonal group or the rotation group in , which is then an open subset of , and therefore a Lie group of the same dimension. (6)We can also consider the space of complex matrices, and the space of complex invertible matrices. This is a Lie group of real dimension . Moreover, similarly to what was done above for , we can take the group of unitary transformations on , where is the adjoint of .

In fact, we can take the set of all parameterizations that satisfy with every parameterization on . Clearly , and one can easily check that satisfies and . Also, by construction, is maximal with respect to and . Two atlases are said to be equivalent if they define the same differentiable structure. (3)We could also have defined -manifolds by requiring the coordinate changes to be -maps (a -manifold would then denote a topological manifold). 3 (1)The space with the usual topology defined by the Euclidean metric is a Hausdorff space and has a countable basis of open sets.