# Questions tagged [ncalgebra]

Questions about the NCAlgebra, a package for manipulating noncommuting algebraic expressions.

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### NCAlgebra 6.0.2 fails to compute the gradient of the trace of a simple quadratic product

NCAlgebra version 6.0.2 fails to compute the gradient of the trace of a quadratic product. Works fine in version ...
• 113
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### Dealing with commutative, noncommutative variables and patterns with NC Algebra

I use NC ALgebra to deal with polynomials in non commutative variables ei and fj. The eis do not commute with themselves, the fjs do not commute with themselves, but the ei commute with the fjs. So e2 ...
• 11
1 vote
47 views

### ParallelTable and NC polynomial simplification

I use NC algebra to apply simplification rules on non commutative polynomials. I would like to treat a huge number of polynomials, ~200, so I would like to run these computations in parallel. However, ...
• 11
51 views

### NCAlgebra and Simplify, FullSimplify or TensorReduce

I want to simplify non-commutative expressions calculated using NCAlgebra with commuting coefficients, such as using identities for complex numbers, e.g. having ...
• 11
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### Factoring commutative coefficients to the left

Is it possible to make ncalgebra factorize commutative coefficients to the left? For example, if I define a non-commutative object W and a commutative object ...
• 121
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### How to install NCAlgebra to Mathematica Online

New Mathematica user, attempting to install NCAlgebra to Mathematica Online. Following instructions from https://github.com/NCAlgebra/NC/blob/master/README.md , I first tried: ...
• 51
1 vote
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### Derivative of quadratic form in NCAlgebra

I installed the NCAlgebra package in the hope that it contains enough rules for symbolic work with most branch-matrix expressions. ...
• 2,364
64 views

### NCAlgebra - Factoring common commutative coefficients

This is a rather simple question that I cannot quite figure out how to do. Basically, I have the result of some matrix multiplication in which my resultant matrix has a mixture of commutative and non-...
• 304
72 views

### NCAlgebra conjugation

I'm trying to use NCAlgebra to simplify some expressions and I'm having trouble with simplifying conjugates. Let's say I have two variables $a, b$ and a third variable $c$ which I want to conjugate ...
1 vote
58 views

### NCReplaceRepeated destroys noncommutativity; is this a bug?

I am pretty new to patterns in Mathematica. Here is the example I want to consider: ...
229 views

### Is the NCAlgebra package broken?

Just for fun I downloaded and installed the NCAlgebra package. However upon running the NCTEST suite I got the following right off the bat: SUMMARY OF TESTS 22 files tested. 1822 tests completed in ...
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