# mathematica kronecker productkronecker sum

• ### proofEquation for impulse train as sum of complex

2016-11-16 · For n = l N (with integer l) we get. (2) S = 1 N ∑ k = 0 N − 1 1 = 1. For other values of n we can use the formula of the geometric sum to get. (3) S = 1 N 1 − e j 2 π n 1 − e j 2 π n / N = 1 N 1 − 1 1 − e j 2 π n / N = 0. Note that the denominator is not zero when n ≠ l N. Consequently we have.

• ### Sums of Kronecker products of elements of one list with

2020-6-14 · The following code generalizes the kronecker products sum and then splits the result. The original code is. lst <- lapply(seq_along(a) function(i) kronecker(a i B i )) res <- Reduce(` ` lst) But following a comment of user G. Grothendieck this can be written as. res <- Reduce(" " Map(kronecker a B)) Then split the results matrix.

• ### matrixHow can I compute a Kronecker sum in Mathematica

2021-6-5 · Using the Wikipedia definition of Kronecker sum it seems that we can define it in terms of the Kronecker products which is built in Clear kroneckersum kroneckersum a_ b_ / Dimensions a == Dimensions b = KroneckerProduct a IdentityMatrix Length a KroneckerProduct IdentityMatrix Length b b a = RandomInteger 0 10 5 5 b =

• ### The Matrix Cookbook

2012-11-15 · B Kronecker product 0 The null matrix. Zero in all entries. I The identity matrix Jij The single-entry matrix 1 at (ij) and zero elsewhere A positive de nite matrix A diagonal matrix Petersen Pedersen The Matrix Cookbook Version November 15 2012 Page 5

• ### Chapter 13 Kronecker ProductsSIAM

2006-10-27 · "ajlbook" — 2004/11/9 — 13 36 — page 142 — #150 142 Chapter 13. Kronecker Products decompositions given by P−1AP = J A and Q−1BQ= J B respectively then

• ### Kranc a Mathematica package to generate numerical codes

2006-6-15 · The diagram in Fig. 1 illustrates the relationships between the Kranc packages KrancThorns TensorTools CodeGen Thorn and MapLookup which are described in the following subsections.Structuring the code in this way separating out the different logically independent functions promotes code reuse. For example none of the thorn generation packages need to know anything

• ### Kronecker delta simplification involving fractions

However looks like that Mathematica is not able to solve it. It just returns the same expression. But if I change the Kronecker delta argument to i 10 instead of i l the sum is simplified. I d like to know if there s a way to simplify this kind of expression since it does simplify this kind of sum if

• ### Kranc a Mathematica package to generate numerical codes

2006-6-15 · Replace the covariant derivative of a sum using the linearity property ∇ a (x y) → ∇ a x ∇ a y. Replace the covariant derivative of an arbitrary expression containing tensorial indices with its expansion in terms of a partial derivative and Christoffel symbols one for each index in the expression e.g. ∇ a V b → ∂ a V b Γ

• ### How to get the result of a multiplication between a matrix

In Mathematica the dot operator is overloaded and can be matrix multiplication matrix-vector multiplication vector-matrix multiplication or the scalar dot product of vectors depending on context. If possible Mathematica also conforms the vectors as needed. For example a nxm matrix can multiply a m-wide row vector without objection.

• ### Sequences Sums Series Mathematica Wolfram Language

Sequences Sums Series. In the Wolfram Language integer sequences are represented by lists. Use Table to define a simple sequence Some well-known sequences are built in Define a recursive sequence using RecurrenceTable (Note the use of x min max notation.) Convergent series may be automatically simplified

• ### quantum mechanicsKronecker sum or direct sum

2016-1-25 · 1 Answer1. Active Oldest Votes. 4. It is definitely a Kronecker sum. Take the case where there are only two different states and − then for example H = E a † a E − a − † a −. What does a means

• ### Matlab kron_u010555688

2014-7-15 · MatlabkronKronecker . function K = kron (A B) KRON Kronecker tensor product. KRON (X Y) is the Kronecker tensor product of X and Y. The result is a large matrix formed by taking all possible products between the elements of X and

• ### The eigenvalues of a specific Kronecker sumMathematics

2020-3-29 · This is similar looking to the Kronecker sum of two matrices begin equation A oplus B = I_m otimes A B otimes I_n end equation The Kronecker sum has the property that it s eigenvalues are the pairwise sums of the spectrums of A and B .

• ### linear algebraWhy is this sum of Kronecker products

2020-3-22 · M ( n) = 2 ( I 2 ⊗ I n) J 2 ⊗ J n − J 2 ⊗ I n − I 2 ⊗ J n. From here I don t see a way to simplify the expression for M ( n). Of course no formula for the determinant of the sum of two matrices exists so we cannot hope to simplify det M ( n) directly along these lines.

• ### quantum mechanicsKronecker sum or direct sum

2016-1-25 · 1 Answer1. Active Oldest Votes. 4. It is definitely a Kronecker sum. Take the case where there are only two different states and − then for example H = E a † a E − a − † a −. What does a means

• ### tensor productsWhy is the Kronecker sum defined for

2019-3-9 · I define the Kronecker sum as follows A ⊕ B = ( a 11 B ⋯ a 1 n B ⋮ ⋱ ⋮ a m 1 B ⋯ a m n B) This worked for my problems where A and B were row and column vectors respectively. In order to test the general case I took A as an m n matrix and B as an p q matrix where ( m n p q) are randomly selected and I populated

• ### code golfCalculate the Kronecker sum of two matrices

2016-4-26 · A Kronecker sum has the following properties Ia and Ib are the identity matrices with the dimensions of A and B respectively. A and B are square matrices. Note that A and B can be of different sizes. Given two square matrices A and B calculate the Kronecker sum of the two matrices. The size of the matrices will be at least 2-by-2.

• ### Chapter 13 Kronecker ProductsSIAM

2006-10-27 · "ajlbook" — 2004/11/9 — 13 36 — page 142 — #150 142 Chapter 13. Kronecker Products decompositions given by P−1AP = J A and Q−1BQ= J B respectively then

• ### Kronecker Decomposition New in Mathematica 9

New in Mathematica 9 › Enhanced Control Systems Kronecker Decomposition TransferFunctionModel supports improper transfer functions. When converted to the time domain an improper transfer function creates a descriptor StateSpaceModel.The proper and polynomial parts of the transfer function can be decoupled in the state-space model with KroneckerModelDecomposition.

• ### How to get the result of a multiplication between a matrix

In Mathematica the dot operator is overloaded and can be matrix multiplication matrix-vector multiplication vector-matrix multiplication or the scalar dot product of vectors depending on context. If possible Mathematica also conforms the vectors as needed. For example a nxm matrix can multiply a m-wide row vector without objection.

• ### Matlab kron_u010555688

2014-7-15 ·  kron C=kron (A B) Am n Bp q Cmp nq kronKronecker Kronecker XYKronecker X11 Y X12 Y X1n YX21 Y X22 Y X2n

• ### Sums of Kronecker products of elements of one list with

2020-6-14 · The following code generalizes the kronecker products sum and then splits the result. The original code is. lst <- lapply(seq_along(a) function(i) kronecker(a i B i )) res <- Reduce(` ` lst) But following a comment of user G. Grothendieck this can be written as. res <- Reduce(" " Map(kronecker a B)) Then split the results matrix.

• ### Kronecker s Views on the Foundations of Mathematics

1989-1-1 · Cantor s Philosophical Views 65 40 Spinoza B. Ethik. Leipzig 1972. Karl Weierstraß (1815-1897). Courtesy of Springer-Verlag. Leopold Kronecker (1823-1891) Courtesy of Springer-Verlag Archives Kronecker s Views on the Foundations of Mathematics Harold M. Edwards In the past I have lamented that Kronecker did not publish more about his views on the foundations of mathematics.1 I

• ### Kranc a Mathematica package to generate numerical codes

2006-6-15 · The diagram in Fig. 1 illustrates the relationships between the Kranc packages KrancThorns TensorTools CodeGen Thorn and MapLookup which are described in the following subsections.Structuring the code in this way separating out the different logically independent functions promotes code reuse. For example none of the thorn generation packages need to know anything

• ### Mathematica_nimingzhe2008

2012-2-20 · MathematicaMATHEMATICS AND ALGORITHMSVISUALIZATION AND GRAPHICS . Collect poly x y arrange a polynomial as a sum of powers of x y . FactorTerms poly x y pull out any overall factorthat does not depend on x y . Factor poly

• ### Simplify sums with Kronecker deltas Online Technical

Hi I am defining a sum using the following code mySum = Sum a i b i i 1 n Then I do myValue = D mySum a k Which naturally gives sum _ i=1 n b(i) delta _ i k . Since no assumptions are made Mathematica can do nothing more to simplify the expression. But then I do Simplify myValue k