# Tag Info

### What are the counterparts in Wolfram to left and right division of a matrix in other programming language, e.g. Julia and MATLAB?

I just stumbled upon it! At least when storing the factorization in a LinearSolveFunction object, we can use it for the transposed solve by supplying a further (not ...

### What are the counterparts in Wolfram to left and right division of a matrix in other programming language, e.g. Julia and MATLAB?

The documentation for MATLAB's mrdivide states that The operators / and \ are related to each other by the equation B/A = (A'\B')' In light of this we may ...
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### Is there a built-in function to inverse Thread?

Let's make this a little more challenging: ...
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### What are the counterparts in Wolfram to left and right division of a matrix in other programming language, e.g. Julia and MATLAB?

Henrik has already written on the undocumented second argument of a LinearSolveFunction[], so let me just put out a short demo wrapper showing how to use the built-...

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### Why doesn't Lambert function (ProductLog) simplify?

The identity does not hold for x < -1: Plot[ProductLog[x*Exp[x]], {x, -5, 5}] ...
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### Can I use Compile to speed up InverseCDF?

This is a little long for a comment, beside which it points out an unexpected difference probably resulting from subsystems evolving independently at different times. In addition to Henrik's comment ...
• 237k
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### How to get more terms with the Series[] expansion of InverseErf[x] around x=1?

This is not strictly speaking an answer, but I thought I provide code that can be used to generate the kind of expansion that OP mentions. Perhaps it is useful for other people here. I use $y$ as an ...
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### Inverse CDF of non-builtin probability distribution

Clear[RaisedCosineDistribution] As with built-in distributions, you need to include the parameters in the distribution definition, and the constraints on the ...
• 160k
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### What is the inverse of the Position function?

I don't know that you can do it in a single command. But it's easy enough to do in two. Say your list is list={2,1,4}; ...
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### InverseFunction fails to invert $e^{-x/2}-e^{x/2}$

InverseFunction operates on an abstract function, yielding an abstract, anonymous function. g[x] is not a function, but a ...
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### Can I use Compile to speed up InverseCDF?

Let me demonstrate two approaches in this answer. P.J. Acklam (WayBack archive of his page) devised a not-too-long method to approximate the quantile of the Gaussian distribution, with absolute ...

As it explained in tutorials functions Radon and InverseRadon are supposed to be used with images only and not with arbitrary ...
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### Inverse function of y = x + (0.022 - x) ^ 1.414?

Instead of worrying about an analytical solution, it can be done numerically by an interpolating function: ...
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### What is the inverse of the Position function?

Normal@SparseArray[Thread[{1, 5} -> 1]] (* {1, 0, 0, 0, 1} *) Normal@SparseArray[Thread[{2, 1, 4} -> 1]] (* {1, 1, 0, 1} *)
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