Tag: tensors

75 Internal`Bag inside Compile 2012-01-28T06:23:28.303

41 How to calculate scalar curvature Ricci tensor and Christoffel symbols in Mathematica? 2012-07-31T05:09:10.503

21 Higher order SVD 2012-05-21T22:35:26.193

21 Nearest Kronecker Product 2015-08-15T00:25:10.903

21 What is the definition of Curl in Mathematica? 2019-02-12T08:59:46.720

18 Using Mathematica for tensor analysis 2013-02-21T13:30:43.937

17 Ways to compute inner products of tensors 2013-01-14T15:23:10.120

16 How to represent and manipulate abstract indexed vector (or tensor) expressions? 2012-01-19T16:57:56.537

16 How can I define or use a new coordinate system? 2015-02-24T19:25:28.157

14 Efficient way to flatten or transpose-arrayreshape tensors 2015-10-13T22:30:00.450

14 Python's einsum equivalent in Mathematica? 2017-10-19T11:15:05.600

13 Can I use symbolic tensors for simple linear algebra and calculus? 2014-07-07T12:06:15.033

12 Nesting Parallel processes 2012-02-27T21:27:24.070

12 How to take derivative of parameterized coordinate? 2014-02-07T20:23:57.967

12 How to rewrite a tensor as a matrix 2020-07-17T10:54:07.003

11 How to read off coefficients of tensor-like expression in a speedy way? 2013-04-10T00:05:24.303

11 Looking for an elegant way to construct this tensor-product-ish list 2013-06-26T19:09:43.547

11 Computations in the exterior algebra 2013-11-26T05:14:18.397

11 A comprehensive list of all correct input formats for [[experimental]] Neural Net functions? 2016-08-28T07:34:50.303

10 Reduce the output from tuples by including symmetry? 2013-03-10T12:25:39.187

10 Symbolic tensor simplifications and the identity matrix 2013-07-14T17:16:33.083

10 Perturbation theory in general relativity using xAct 2014-12-06T16:04:01.400

10 TensorReduce and Dot 2016-09-16T16:28:40.083

10 Make symbols atomic, without losing their type 2019-06-16T10:38:58.617

9 Verifying and deriving basic (block) matrix identities 2012-12-09T17:10:04.410

9 Elementwise join 2013-01-07T23:10:02.593

9 Simplifying the trace of a matrix expression 2013-06-09T01:53:13.017

9 Symbolic linear algebra 2013-10-28T19:59:21.867

9 Compute a double dot product between two tensors of rank 3 and 2 2015-09-24T20:14:52.003

9 Performance improvements by using Activate and Inactivate 2016-09-08T09:22:28.513

9 Function to convert TensorContract[_TensorProduct, indices] into equivalent Dot + Tr version 2017-09-11T05:33:54.003

9 What's the fastest way to take Mean of a Tensor in given slot? 2017-10-21T22:50:41.540

9 How can I automate this tensor computation? 2019-07-19T13:14:33.697

9 Nice use case for symbolic tensors? 2020-12-09T13:58:17.987

8 Compiling Map over expression that yields a ragged array 2012-12-02T20:15:48.463

8 inverse of abstract matrix 2013-02-20T14:40:53.140

8 Error messages from TensorContract and TensorReduce 2014-10-09T20:01:28.863

8 How to define an orthogonal basis in the right way? 2015-02-13T17:24:16.400

8 How is Grad defined for array particularly in non-Cartesian coordinates? 2020-07-07T07:48:54.147

8 Equivalent of numpy's newaxis 2021-02-06T15:49:50.163

7 Solving antisymmetric tensorial equation 2012-09-20T10:28:06.373

7 TensorContract of inverse matrix 2013-02-26T13:47:24.720

7 Contracting with Levi-Civita (totally antisymmetric) tensor 2014-02-26T12:51:17.267

7 How to get rid of nested matrices 2014-07-02T02:24:56.993

7 SymmetrizedArray of stiffness/compliance tensor 2014-10-23T19:31:34.610

7 Issue with TensorWedge and TensorReduce? 2015-11-23T17:26:17.587

7 How to force Series[] to compute expansions by considering non commutative multiplication? 2016-03-12T14:36:38.010

7 How to simplify tensor expression with symbolic coeficients? 2018-08-26T06:36:54.470

7 Speeding up tensor contractions and multiplication 2019-07-07T07:13:20.977

7 How to implement Einstein summation convention with differential operators 2020-03-22T10:48:30.293

7 Tensor transformation 2020-11-04T18:57:45.480

6 How to simplify symbolic expressions with KroneckerProduct 2015-08-12T23:35:21.733

6 Matrix Multiplication after "Flatten" 2015-12-08T13:26:26.057

6 Variating the derivative of the metric using xTensor 2016-07-28T19:03:50.257

6 Convert single index into the multiple indices of a tensor product basis 2016-09-01T18:29:06.813

6 Compute covariant derivative in Mathematica 2017-02-28T12:39:22.993

6 Dot Product of Block Matrices 2017-10-28T10:33:25.717

6 Looking for a package for Cartan formalism in Mathematica 2018-02-08T15:12:46.503

6 Symbolic calculation with generators and relations 2018-02-09T13:59:28.397

6 Voigt notation in Mathematica 2018-07-20T00:06:13.593

6 Speeding up sums involving 16x16 matrices and 16x16x16x16 antisymmetric tensor 2019-11-21T05:37:59.810

6 Contracting indices in lists 2020-05-17T09:44:31.413

6 Derivative of real antisymmetric matrix in mathematica 2020-07-17T06:24:26.217

6 Undefined Indexed Variable 2020-11-26T10:27:51.233

5 Problems with CircleTimes and infix notation 2012-05-02T07:23:16.347

5 Multidimensional array reduction through summation over one of its dimensions 2012-07-27T17:48:48.413

5 Summing tensors in mathematica 2013-02-08T06:04:57.593

5 How can I get Mathematica to recognize equality of symbolic matrix expressions? 2013-08-27T02:33:55.163

5 Mixed product identity between tensors in Mathematica 9 2013-10-14T10:58:17.300

5 Linearized Einstein Equations with Mathematica 2013-11-08T10:16:54.570

5 Mathematica package for supergravity and superstring theory 2014-07-17T05:44:43.147

5 TensorReduce not simplifying transpose for symmetric matrix? 2015-01-26T14:54:30.563

5 FindFit returns "tensors have incompatible shapes" 2015-04-01T06:18:58.727

5 Tensors with mixed symmetry 2015-04-24T20:18:00.997

5 The fastest way of raising indices of high rank tensor 2015-07-25T17:57:34.697

5 Curl of a second-order tensor 2015-10-07T21:47:03.330

5 Perform matrix/tensor contractions more efficiently 2016-03-30T21:06:34.190

5 Efficient implementation of tensorial Rayleigh product 2016-07-05T11:37:27.123

5 Calculating e.g. Euler density or Riemann tensor's square for a given metric using xAct package 2016-07-28T08:32:23.273

5 TensorContract applied twice 2016-09-05T12:03:47.023

5 Conveniently solving tensor equations in which the contained tensors have various symmetries 2016-11-25T14:51:12.630

5 How to define a tensor in xAct for Mathematica? 2017-04-16T21:52:36.140

5 Eigenvalues and eigenvectors of tensors 2017-10-15T11:59:12.117

5 Find independent tensor products using Young Tableaux 2018-03-28T12:16:28.450

5 How to determine computationally the set of linear independent permutations of a tensor with known symmetries? 2018-06-19T16:43:49.427

5 Why won't Mathematica simplify tensor products fully? 2018-08-09T09:53:41.337

5 Explicitly construct tensor quantities with given symmetries 2018-11-03T22:37:39.023

5 How to Creat a Symbolic Rank 4 Symmetric tensor 2019-07-31T20:50:44.503

5 Computing Higher Order Tensor of Variable Rank 2019-08-06T08:50:29.790

5 A simple problem on TensorTranspose 2020-03-26T14:13:06.237

5 Array reshaping without explicitly specifying one dimension 2020-08-13T12:13:19.913

5 Pair-wise antisymmetric tensor 2020-09-08T09:57:01.280

4 On elegant use of Inner and Outer on tensors 2014-04-27T08:15:27.740

4 Tensor product involving Levi Civita symbol 2014-07-06T10:16:13.733

4 How to put the tensor product of two operators onto two variables? 2014-08-28T12:14:59.823

4 Finding basis of isotropic tensors of rank $n$ 2015-03-21T12:39:22.227

4 Using LeviCivitaTensor 2015-04-26T17:12:30.023

4 Simplifying nested KroneckerProducts 2015-09-27T22:43:31.643

4 How to write Coordinate Chart in Xcoba in index form? 2015-10-19T08:03:54.773