Linked Questions

0
votes
0answers
14 views

Rank of symbolic matrix [duplicate]

I can't figure out why Mathematica can't calculate rank of a symbolic matrix. Please take a look at the attached screenshot below. If you need the full source code then you can find it in the "...
0
votes
0answers
11 views

Creating 3x3 Matrix using Table Function and then accessing an element [duplicate]

I use the table function to create a 3x3 matrix in index notation. I assume that I can access the element in first row and first column using A[[1,1]] but instead ...
13
votes
4answers
1k views

How to solve this matrix equation

How to solve this matrix equation Solve[MatrixRank[( { {1, x, 3}, {2, 4, 5}, {2, 4, x} } )] == 2, x, Reals]
14
votes
3answers
354 views

Head of a MatrixForm expression?

An example in http://www-zeuthen.desy.de/theory/capp2005/Course/hahn/mathematica.pdf amounts to the following ...
5
votes
2answers
5k views

How to make Mathematica show matrices and vectors nicely

It shows me like {{0}, {1}, {0}, {-1}} . Is it possible to make it look like a vector, always?
4
votes
2answers
3k views

How to compute the partial trace of a 4x4 matrix?

I want to compute a partial trace using formula $\rho_A=\sum\langle B|\rho_{AB}|B\rangle$ . Example, $\rho_{AB}= $$ \begin{pmatrix} a & b & c & d\\ e & f & g & h\\ i &...
5
votes
1answer
3k views

How can you convert a matrix back into a list of lists?

It is very simple in Mathematica to convert a list of lists into a matrix: all you need to do is apply the //MatrixForm function to it and voila. Is it possible ...
4
votes
3answers
432 views

Generating all 2x2 matrices with entries from 0 to 3 whose det is 1 with mod 2 arithmetic

I am trying to make a list of 2x2 matrices whose entries are all possible permutations of 0,1,2 and det=1 mod 2 arithmetic. First I tried to create a Table like this ...
2
votes
3answers
446 views

MatrixForm explanation as why row extract is displayed as a column?

I have a 5 x 5 matrix: cdsSpread5yrs = But after doing a row extract, why is it displaying as a column? ...
4
votes
2answers
2k views

How to make a matrix of derivatives? [duplicate]

For example I can construct: row1 = D[f(x,y),x,#]&/@{x,y} row2 = D[f(x,y),x,#]&/@{x,y} then: ...
0
votes
2answers
1k views
-2
votes
2answers
356 views

Mathematica not assigning variable correctly

So I have been fiddling with this the last hour and I just can't get it to work. I have 3 matrices of the same size which contain nothing but 0's in a list, I also have 3 matrices of the same size (...
6
votes
1answer
290 views

Calculations after NumberForm [duplicate]

As specified in documentation center the functions AccountingForm, NumberForm, etc. are useful only to display numbers in ...
2
votes
1answer
704 views

Change of basis in Mathematica

I'm trying to set up a change of basis matrix from the base V -> W with the RowReduce function that's built into Mathematica. I am then supposed to verify the result by taking the product of the ...
3
votes
2answers
108 views

How do Forms affect the interpretation of Expressions?

Below are three formats for representing an undirected edge between vertices a and b: ...

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