# Is manifold a metric space?

## Is manifold a metric space?

The metric is highly non-unique and a manifold doesn’t come with a preferred metric which turns it into a metric space.

## What is a manifold in space?

A manifold is a topological space that is locally Euclidean (i.e., around every point, there is a neighborhood that is topologically the same as the open unit ball in. ). To illustrate this idea, consider the ancient belief that the Earth was flat as contrasted with the modern evidence that it is round.

What is a manifold mathematics?

manifold, in mathematics, a generalization and abstraction of the notion of a curved surface; a manifold is a topological space that is modeled closely on Euclidean space locally but may vary widely in global properties.

### Does every manifold have a Riemannian metric?

Every smooth manifold carries a Riemannian metric (in fact, many of them). We will prove this using an argument very similar to that used in showing the existence of connections. ραg(α) (Dϕα(u), Dϕα(v)) . This is clearly symmetric; g(u, u) ≥ 0; and g(u, u)=0iff u = 0.

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### Is manifold a vector space?

So the phrase “space-time interval” regards the space-time (which before anything is a manifold) as a vector space. So, here, a manifold is regarded as a vector space. And I understand that Rn can also be regarded as a vector space.

Are manifolds connected?

A manifold need not be connected, but every manifold M is a disjoint union of connected manifolds. These are just the connected components of M, which are open sets since manifolds are locally-connected.

#### What do you understand by manifold classification explain?

If a population is divided into a number of mutually exclusive classes according to some given characteristic and then each class is divided by reference to some second, third, etc. characteristic, the final grouping is called a manifold classification.

#### Is Riemannian metric symmetric?

Basic examples of Riemannian symmetric spaces are Euclidean space, spheres, projective spaces, and hyperbolic spaces, each with their standard Riemannian metrics. which is symmetric.

What is Riemannian metric tensor?

A manifold equipped with a positive-definite metric tensor is known as a Riemannian manifold. The components of a metric tensor in a coordinate basis take on the form of a symmetric matrix whose entries transform covariantly under changes to the coordinate system. Thus a metric tensor is a covariant symmetric tensor.