# What Do You Know About Schur Functors?

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Questions: 10 | Attempts: 115  Settings  In the science of structure, order, and relation otherwise known as mathematics, the field of representation theory encompasses Schur functors, which are particular functors from the classification of modules over a settled commutative ring to itself.
They are indexed by partitions and applicable in the context of Schur-Weyl duality and Specht module amongst others.

• 1.

### Which power of a vector space do they generalize?

• A.

Interior power

• B.

Symmetric power

• C.

Asymmetric power

• D.

Fusion power

B. Symmetric power
Explanation
The given options are all related to powers of a vector space. Interior power, asymmetric power, and fusion power are not commonly used terms in the context of vector spaces. However, the symmetric power is a well-known concept in algebraic topology and representation theory. It generalizes the notion of taking the exterior power of a vector space, which corresponds to antisymmetrization. The symmetric power, on the other hand, corresponds to symmetrization and captures the symmetric part of a tensor product of vector spaces.

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• 2.

### In which sort of space is it applied?

• A.

Vector space

• B.

Scalar space

• C.

Vector—Scalar space

• D.

Geometric space

A. Vector space
Explanation
The question is asking about the sort of space in which the concept is applied. The correct answer is "Vector space" because a vector space is a mathematical structure that consists of a set of vectors and operations such as addition and scalar multiplication. It is used to study and analyze vectors and their properties, such as magnitude and direction.

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• 3.

### What are used to index the Schur functors?

• A.

Young diagrams

• B.

Diagrammatic functions

• C.

Brandon indexes

• D.

Crystal structures

A. Young diagrams
Explanation
Young diagrams are used to index the Schur functors. A Young diagram is a graphical representation of a partition of a positive integer, where each row represents a part of the partition. The Schur functors are a family of functors in representation theory that are used to study symmetric functions and their connections to other areas of mathematics. The indexing of the Schur functors by Young diagrams allows for a systematic and efficient way to study these objects and their properties.

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• 4.

### Which ring is associated with the theorem?

• A.

Associative ring

• B.

Distributive ring

• C.

Commutative ring

• D.

Fixed ring

C. Commutative ring
Explanation
A commutative ring is a type of algebraic structure where the multiplication operation is commutative, meaning that the order in which elements are multiplied does not affect the result. In other words, for any elements a and b in the ring, a*b = b*a. This property is known as commutativity. The answer "Commutative ring" suggests that the ring associated with the theorem has this property.

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• 5.

### What does the horizontal diagram with n cells correspond to?

• A.

Nth interior power functor

• B.

Nth power functor

• C.

Nth exterior power functor

• D.

Nth symmetric power functor

C. Nth exterior power functor
Explanation
The horizontal diagram with n cells corresponds to the nth exterior power functor. The exterior power functor is a construction in linear algebra that generalizes the notion of taking the determinant of a matrix. It is used to study alternating multilinear maps and forms. The horizontal diagram represents the transformation of vectors into their exterior powers, which are subspaces of the original vector space.

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• 6.

### What does the vertical diagram with n cells correspond to?

• A.

Nth symmetric power functor

• B.

Nth exterior power functor

• C.

Nth power functor

• D.

Nth interior power functor

A. Nth symmetric power functor
Explanation
The vertical diagram with n cells corresponds to the nth symmetric power functor. This functor takes a vector space and forms the direct sum of all possible n-fold tensor products of the vector space with itself, with the condition that the tensor product is symmetric. In other words, it captures all possible ways to symmetrically combine n copies of the vector space. This is represented by the vertical diagram with n cells, where each cell represents one copy of the vector space.

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• 7.

### What does V represent?

• A.

Vector space

• B.

Valency

• C.

Velocity

• D.

Vassicitude

A. Vector space
Explanation
V represents a vector space. A vector space is a mathematical structure that consists of a set of vectors along with operations of addition and scalar multiplication. It is a fundamental concept in linear algebra and is used to study properties and relationships of vectors in a mathematical space.

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• 8.

### What does R represent?

• A.

Commutative ring

• B.

Associative ring

• C.

Fixed ring

• D.

Distributive ring

A. Commutative ring
Explanation
The correct answer is Commutative ring. A commutative ring is a mathematical structure in which addition and multiplication operations are both commutative. This means that the order in which elements are added or multiplied does not affect the result. In a commutative ring, the multiplication operation also satisfies the associative property, meaning that the grouping of elements in the multiplication does not affect the result. Therefore, R represents a commutative ring in this context.

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• 9.

### Which condition satisfies a vector space V that is fixed over a field of characteristic zero?

• A.

( V ) = Λ n( V )

• B.

S λ ( V ) = Λ n( V )

• C.

S λ ( V ) = n( V)

• D.

S = Λ n( V )

B. S λ ( V ) = Λ n( V )
• 10.

### What does ​​​​​​TGL(V) represent?

• A.

Endomorphism group

• B.

Pyromorphism group

• C.

Interior group

• D.

Automorphism group

D. Automorphism group
Explanation
TGL(V) represents the Automorphism group. An automorphism is an isomorphism from a mathematical object to itself. In this case, TGL(V) refers to the set of all automorphisms of a vector space V. These automorphisms are linear transformations that preserve the structure and properties of the vector space.

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