Are Order 1 Alternating Tensors Different from Normal Tensors?

  • Thread starter yifli
  • Start date
  • Tags
    Tensor
In summary, the difference between order 1 alternating tensors and normal order 1 tensors is that for an alternating tensor to be anti-symmetric, there must be at least one pair of indices that cause the tensor to change sign when swapped. This means that a 1-tensor cannot be anti-symmetric and therefore does not fit the definition of an alternating tensor. It is correct to say that there is no difference between order 1 alternating tensors and normal order 1 tensors.
  • #1
yifli
70
0
I don't understand how order 1 alternating tensors fit the definition of alternating tensors. I think the order has to be at least 2 for the definition to make sense because only then can we talk about permutation.

So I think there's no difference between order 1 alternating tensors and normal order 1 tensors, correct?
 
Physics news on Phys.org
  • #2
When you say alternating do you mean anti - symmetric? Anyways, yes you are correct in saying that a 1 - tensor is not anti - symmetric because for a tensor to be anti - symmetric there needs to be at least one pair of indeces such that the tensor changes sign when the indeces in the pair are swapped in which case it is anti - symmetric in those two indeces.
 
  • #3
remember truth by empty hypothesis?
 

What is an alternating tensor of order 1?

An alternating tensor of order 1 is a mathematical object that represents a linear transformation from a vector space to its dual space. It is also known as a covector or a 1-form.

How is an alternating tensor of order 1 different from a regular tensor?

Unlike regular tensors, alternating tensors of order 1 have the property of changing sign when the order of the arguments is switched. This means that the value of an alternating tensor is negated when the inputs are swapped.

What is the significance of alternating tensors of order 1 in mathematics?

Alternating tensors of order 1 are important in many areas of mathematics, particularly in differential geometry, multilinear algebra, and vector calculus. They play a crucial role in defining differential forms and studying properties of manifolds.

How are alternating tensors of order 1 used in physics?

In physics, alternating tensors of order 1 are used to represent physical quantities that have both magnitude and direction, such as force and electric or magnetic fields. They are also used in describing the behavior of systems with rotational symmetry.

Can an alternating tensor of order 1 be represented by a matrix?

Yes, an alternating tensor of order 1 can be represented by a matrix. However, the matrix will have certain properties, such as being skew-symmetric, that reflect the alternating nature of the tensor. This representation is useful for performing calculations and transformations involving alternating tensors of order 1.

Similar threads

  • Linear and Abstract Algebra
Replies
2
Views
928
  • Linear and Abstract Algebra
Replies
1
Views
824
Replies
1
Views
2K
  • Differential Geometry
Replies
2
Views
517
  • Linear and Abstract Algebra
Replies
2
Views
910
  • Linear and Abstract Algebra
Replies
1
Views
3K
  • Linear and Abstract Algebra
Replies
1
Views
2K
Replies
2
Views
1K
  • Quantum Physics
Replies
11
Views
1K
  • Special and General Relativity
2
Replies
38
Views
5K
Back
Top