We’ve just noted that R as a vector space over Q contains a set of linearly independent vectors of size n + 1, for any positive integer n. Hence R cannot have finite dimension as a vector space over Q. That is,

R has infinite dimension

as a vector space over Q.

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## Is R is a vector space over R?

A vector space over the field R is often called

a real vector space

, and one over C is a complex vector space. vector by a scalar (a real number).

## Is r2 a vector space over Q?

a vector space over its over field. For example, R is not a vector space over C, because multiplication of a real number and a complex number is not necessarily a real number. EXAMPLE-2 R is a

vector space over Q

, because Q is a subfield of R.

## Can vector space empty?

The empty set is empty (no elements), hence it fails to have the zero vector as an element. Since it fails to contain zero vector,

it cannot be a vector space

.

## Is Q Q A vector space?

To see that Qn is

a vector space

over Q you could first prove that every field F is a vector space over itself and then since the product of vector spaces is a vector space Fn is a vector space over F and so Qn is a vector space over Q since Q is a field.

## Is C NA vector space?

(i) Yes,

C is a vector space over R

. Since every complex number is uniquely expressible in the form a + bi with a, b ∈ R we see that (1, i) is a basis for C over R. Thus the dimension is two. (ii) Every field is always a 1-dimensional vector space over itself.

## What does R over R mean?

The “over R” means

using R as the field of scalars

.

## Is R 3 a vector space?

The set of all ordered triples of real numbers is called 3‐

space

, denoted R

^{ 3 }

(“R three”). See Figure . … Vectors in R

^{ 3 }

are called 3‐vectors (because there are 3 components), and the geometric descriptions of addition and scalar multiplication given for 2‐vectors also carry over to 3‐vectors.

## Is Q subspace of R?

Given a subset S⊂R, the Q-vector

space VS=spanQ(S)

, as a subspace of R, has dimension dim(VS) that can be finite or infinite (denumerable or not).

## Which one is not vector space?

Similarily, a vector space needs to allow any scalar multiplication, including negative scalings, so

the first quadrant of the plane (even including the coordinate axes and the origin)

is not a vector space.

## What is difference between vector and vector space?

A vector is a member of a vector space. A vector space is a set of objects which can be multiplied by

regular numbers

and added together via some rules called the vector space axioms.

## What is an F vector space?

A vector space over F — a.k.a. an F-space — is

a set (often denoted V ) which has a binary operation +V (vector addition) defined on it

, and an operation ·F,V (scalar multiplication) defined from F × V to V . (So for any v, w ∈ V , v +V w is in V , and for any α ∈ F and v ∈ V α·F,V v ∈ V .

## Can zero vector be a basis?

Indeed,

the zero-vector cannot be a basis because it is not independent

. Taylor and Lay define (Hamel) bases only for vector spaces with “some nonzero elements”.

## Is empty set a subspace of every vector space?

Vector spaces can’t be empty, because they have to contain additive identity and therefore at least 1 element! The empty set isn’t (vector spaces must contain 0). However,

{0} is indeed a subspace of every

vector space.

## What does a zero vector mean?

: a vector which is

of zero length and all of whose components are zero

.

## How do you prove a vector space?

Proof. The vector space axioms ensure the existence of an element −v of V with the property that

v+(−v) = 0

, where 0 is the zero element of V . The identity x+v = u is satisfied when x = u+(−v), since (u + (−v)) + v = u + ((−v) + v) = u + (v + (−v)) = u + 0 = u. x = x + 0 = x + (v + (−v)) = (x + v)+(−v) = u + (−v).