# Tag Info

Accepted

### How to Series Expand an Expression in Mathematica with Smaller Cross Terms Compared to Diagonal Terms?

Let us introduce an extra (small) parameter t and rescale the cross-term parameters by the factor of t: ...
• 1,940
Accepted

### How to verify a FactorialPower identity?

Another way is to use FindSequenceFunction We start from FactorialPower[x - i*k, n, m*k] and compute a few values, say ...
• 16.4k

### How to verify a FactorialPower identity?

A very good indication is that it's true for $m=1\ldots30$ (and higher, if you have the patience): ...
• 49.1k
Accepted

Try this: ...
• 39.8k

### Mathematica isn't returning identity matrix when multiplying matrix by its inverse

Assuming you mean Pinv := Inverse[P]; (instead of Pmatrix, which is undefined) you need to use matrix mulitplication ...
• 69.5k
Accepted

### Problem computing a limit

Sum[] is difficult to handle in general, and it seems to be why Limit[] is so slow. In this case, it's a polynomial and its ...
• 240k

### Problem computing a limit

The problems seems that for different $j$ you can get 1/0 division depending on what $x$ value is. So without having specific value of $j$ might not be possible. ...
• 148k

### How to Series Expand an Expression in Mathematica with Smaller Cross Terms Compared to Diagonal Terms?

Similar to @A.Kato's solution but with auto-discovery of variables: expr = (Ex (s13 s23 - s12 s33))/(-s23^2 + s22 s33); Look for diagonal variables: ...
• 49.1k

### Condition on the data of table

It is easier to work with the columns of the table as a list and eliminate the header: tmp = Transpose[(Join[#, {0, 0, 0}]) & /@ table[[2 ;;]]]; Next we insert ...
• 53.9k
Accepted

### Condition on the data of table

You can use ReplaceAll to replace each row (omitting the header row). By using patterns instead of indices, you minimize the risk of mismatching the values. ...
• 29.4k

### How to Series Expand an Expression in Mathematica with Smaller Cross Terms Compared to Diagonal Terms?

You can use the resource function MultivariateTaylorPolynomial with the "Weights" option. Variables with larger weights get removed at lower degrees. ...
• 59.6k

### Minimize the number of components in the output of Reduce

The following is like something I did once to have Mathematica set up and illustrate iterated integrals over regions in ${\Bbb R}^3$. It works on the example at hand, but it probably needs more ...
• 240k
1 vote

### Expression not clear/ too long

Define the expression as a string: ...
• 49.1k
1 vote
Accepted

### Max and Transpose in the Probability of a Union

Your related post 305467 and this has the general gist. A key concept hampering you in both questions is that you do not need a separate variable for every vector and distribution. For this problem <...
• 42.5k

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