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Is the set of all 2x2 invertible matrices a subspace of all 2x2 matrices?
I assume since you're asking if 2x2 invertible matrices are a "subspace" that you are considering the set of all 2x2 matrices as a vector space (which it certainly is). In order for the set of 2x2 invertible matrices to be a subspace of the set of all 2x2 matrices, it must be closed under addition and scalar multiplication. A 2x2 matrix is invertible if and only if its determinant is nonzero. When multiplied by a scalar (let's call it c), the determinant of a 2x2 matrix will be multiplied by c^2 since the determinant is linear in each row (two rows -> two factors of c). If the determinant was nonzero to begin with c^2 times the determinant will be nonzero, so an invertible matrix multiplied by a scalar will remain invertible. Therefore the set of all 2x2 invertible matrices is closed under scalar multiplication. However, this set is not closed under addition. Consider the matrices {[1 0], [0 1]} and {[-1 0], [0 -1]}. Both are invertible (in this case, they are both their own inverses). However, their sum is {[0 0], [0 0]}, which is not invertible because its determinant is 0. In conclusion, the set of invertible 2x2 matrices is not a subspace of the set of all 2x2 matrices because it is not closed under addition.
Why you say matercis is vector?
In math, a "vector field" is an abstract term for a set, and a number of operations, that have specific properties. Matrices of the same size, for example, all 3 x 2 matrices, combined with matrix addition and multiplication by a scalar, happens to have all those properties. You may want to read an introductory Linear Algebra book for more details.
What is difference between vector spaces and field?
A vector space is a set of all points that can be generated by a linear combination of some integer number of vectors. A field is an abstract mathematical construct that is basically a set elements that form an abelian group under two binary operations, with the distributive property. Examples: Euclidean space(x,y,z) is a vector space. The rational and real numbers form a field with regular addition and multiplication. Also, every set of congruence classes formed under a prime integer (mod algebra) is a field.
Why null vector is called vector?
The same sort of reasoning that zero is a number. It ensures that the set of all vectors is closed under addition and that, in turn, allows the generalization of many operations on vectors.Also, the way we got around the concept of having something with zero magnitude also have a direction is pretty cool. We made it up! In abstract algebra it's perfectly OK to constrain a specific algebraic structure with rules (called axioms) that the structure must follow.In your example, the algebraic structure that vectors are in is called a "vector space." One of the axioms that define a vector space is:"An element, 0, called the null vector, exists in a vector space, v, such that v + 0 = vfor all of the vectors in the vector space."Ta Da!! Aren't we clever?
Can a vector space have exactly two distinct vectors in it?
No.A vector space is a set over a field that has to satisfy certain rules, called axioms. The field in question can be Z2 (see discussion), but unlike a field, a vector's inverse is distinct from the vector. Therefore, in order to satisfy the "inverse elements of addition" axiom for vector spaces, a vector space must minimally (except if it is the null space) have three vectors, v, 0, and v-1. The null space only has one vector, 0.Field's can allow for two distinct elements, unlike vector spaces, because for any given element of a field, for example a, a + (-a) = 0 meets the inverse axiom, but a and -a aren't required to be distinct. They are simply scalar magnitudes, unlike vectors which can often be thought of as having a direction attached to them. That's why the vectors, v and -v are distinct, because they're pointing in opposite directions.
Is the set of all 2x2 invertible matrices a subspace of all 2x2 matrices?
I assume since you're asking if 2x2 invertible matrices are a "subspace" that you are considering the set of all 2x2 matrices as a vector space (which it certainly is). In order for the set of 2x2 invertible matrices to be a subspace of the set of all 2x2 matrices, it must be closed under addition and scalar multiplication. A 2x2 matrix is invertible if and only if its determinant is nonzero. When multiplied by a scalar (let's call it c), the determinant of a 2x2 matrix will be multiplied by c^2 since the determinant is linear in each row (two rows -> two factors of c). If the determinant was nonzero to begin with c^2 times the determinant will be nonzero, so an invertible matrix multiplied by a scalar will remain invertible. Therefore the set of all 2x2 invertible matrices is closed under scalar multiplication. However, this set is not closed under addition. Consider the matrices {[1 0], [0 1]} and {[-1 0], [0 -1]}. Both are invertible (in this case, they are both their own inverses). However, their sum is {[0 0], [0 0]}, which is not invertible because its determinant is 0. In conclusion, the set of invertible 2x2 matrices is not a subspace of the set of all 2x2 matrices because it is not closed under addition.
Why you say matercis is vector?
In math, a "vector field" is an abstract term for a set, and a number of operations, that have specific properties. Matrices of the same size, for example, all 3 x 2 matrices, combined with matrix addition and multiplication by a scalar, happens to have all those properties. You may want to read an introductory Linear Algebra book for more details.
What is the definition of orthogonal signal space?
Orthogonal signal space is defined as the set of orthogonal functions, which are complete. In orthogonal vector space any vector can be represented by orthogonal vectors provided they are complete.Thus, in similar manner any signal can be represented by a set of orthogonal functions which are complete.
What is difference between vector spaces and field?
A vector space is a set of all points that can be generated by a linear combination of some integer number of vectors. A field is an abstract mathematical construct that is basically a set elements that form an abelian group under two binary operations, with the distributive property. Examples: Euclidean space(x,y,z) is a vector space. The rational and real numbers form a field with regular addition and multiplication. Also, every set of congruence classes formed under a prime integer (mod algebra) is a field.
What is a vector set?
victor vector from a to b with x affecting! aaarrgh
What has the author Paul R Halmos written?
Paul R. Halmos has written: 'Measure theory' -- subject(s): Topology, Measure theory 'Lectures on ergodic theory' -- subject(s): Statistical mechanics, Ergodic theory 'Measure theory' 'Naive Set Theory' 'Invariant subspaces, 1969' -- subject(s): Hilbert space, Invariants, Generalized spaces 'Bounded integral operators on L(superior 2) spaces' -- subject(s): Hilbert space, Integral operators 'Naive set theory' -- subject(s): Set theory, Arithmetic, Foundations 'Lectures on boolean algebra' 'Entropy in ergodic theory' -- subject(s): Statistical mechanics, Information theory, Transformations (Mathematics) 'Finite-dimensional vector spaces' -- subject(s): Transformations (Mathematics), Vector analysis 'Algebraic logic' -- subject(s): Algebraic logic 'Introduction to Hilbert space and the theory of spectral multiplicity' 'Finite-dimensional vector spaces' -- subject(s): Vector spaces 'Selecta' -- subject(s): Mathematics, Operator theory 'Introduction to Hilbert space and the theory of spectral multiplicity' -- subject(s): Spectral theory (Mathematics) 'Measure Theory' 'A Hilbert space problem book' -- subject(s): Hilbert space 'Invariants of certain stochastic transformations' 'Finite Dimensional Vector Spaces. (AM-7) (Annals of Mathematics Studies)'
Why null vector is called vector?
The same sort of reasoning that zero is a number. It ensures that the set of all vectors is closed under addition and that, in turn, allows the generalization of many operations on vectors.Also, the way we got around the concept of having something with zero magnitude also have a direction is pretty cool. We made it up! In abstract algebra it's perfectly OK to constrain a specific algebraic structure with rules (called axioms) that the structure must follow.In your example, the algebraic structure that vectors are in is called a "vector space." One of the axioms that define a vector space is:"An element, 0, called the null vector, exists in a vector space, v, such that v + 0 = vfor all of the vectors in the vector space."Ta Da!! Aren't we clever?
Can a vector space have exactly two distinct vectors in it?
No.A vector space is a set over a field that has to satisfy certain rules, called axioms. The field in question can be Z2 (see discussion), but unlike a field, a vector's inverse is distinct from the vector. Therefore, in order to satisfy the "inverse elements of addition" axiom for vector spaces, a vector space must minimally (except if it is the null space) have three vectors, v, 0, and v-1. The null space only has one vector, 0.Field's can allow for two distinct elements, unlike vector spaces, because for any given element of a field, for example a, a + (-a) = 0 meets the inverse axiom, but a and -a aren't required to be distinct. They are simply scalar magnitudes, unlike vectors which can often be thought of as having a direction attached to them. That's why the vectors, v and -v are distinct, because they're pointing in opposite directions.
What is a numerical sequence?
A numerical sequence is a set of ordered numbers. That is all! For example, stochastic sequences are random.
How to find orthogonal vector?
Given one vector a, any vector that satisfies a.b=0 is orthogonal to it. That is a set of vectors defining a plane orthogonal to the original vector.The set of vectors defines a plane to which the original vector a is the 'normal'.
What is the singular possessive of matrix?
The plural forms for the noun matrix are matrices and matrixes, both are accepted.
Why inversion of matrix is usefull?
The most common use for inverted matrices is to solve a set of simultaneous equations.
