# Questions tagged [letter-makes-difference]

The tag has no usage guidance.

13 questions
Filter by
Sorted by
Tagged with
174 views

...
• 4,523
1 vote
50 views

### Why does functional form of integration output depend on variables used?

The following integration code is identical, except for the use of integration variables x vs k and constants ...
• 980
377 views

### What is the diffrence between these three commands?

Consider F=1/((x-a)(x-b)) ; G= 1/((x-α)*(x-β)); H=1/((x-r[1])(x-r[2])) ; Using Apart[], the partial fraction decomposition ...
• 1,001
1 vote
139 views

### Should expression evaluation depend on the choice of a variable name?

I am verifying the series representation of the Sonine polynomial or the associated Laguerre polynomial, which is  L_m^{(n)}(x)=\sum\limits_{l=0}^n\left(-1\right)^l\binom{m+n}{m-l}\frac{x^l}{l!}=S_{...
• 811
163 views

### Do symbolic integration of function including \[ScriptCapitalL]

I have done a symbolic integration in mathematica 13.2 as follow Integrate[-((Sqrt[-r(r - 2 l)] l)/(r(r - 2 l) (-r + l))), r] // Simplify[#, r > 0] & ...
• 133
121 views

### Apart behaves differently depending on specific alphabetic letters of variables

I have stumbled across some weird behaviour with Apart. ans1 = Apart[(x1/r2 + x2/r1)/(1/r1 + 1/r2)] Gives ...
• 609
137 views

### Integration result depending on variable name

From previous threads I have read on the subject, it seems that Mathematica is known to simplify expressions to varying degrees depending on alphabetical order of chosen variable names. But none of ...
268 views

### Integral depends on choice of symbols

I am trying to perform integrals of the kind $\int dx\frac{x^2-q^2}{z-x+i\eta}$. Mathematica, however, gives back different results whenever I replace the parameter $z$ by $w$, for instance, as ...
425 views

### DSolve—different solutions for same set of equations using different symbols?

I happen to find that DSolve can give different solutions, even a different number of solutions, for a set of differential equations just by making a change in the ...
• 1,229
549 views

### Are greek symbols causing different evaluation?

I've updated today to Mathematica 9.0.1.0 from version 8 and found something that absolutely confuses me. Let us define a piecewise function: ...
• 381
2k views

### Variable naming changes everything

Bug fixed in 10.0.0 I am having a rather unusual problem I do not understand with Mathematica where renaming one of the variables of my function causes the function to stop "working". Here is the ...
• 503