edgar

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14 years, 257 days

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These are questions asked by edgar

The function hypergeom([2/3,2/3,2/3],[-1/3,4/3],z) has radius of convergence 1 and real coefficients.

But Maple tells me evalf(hypergeom([2/3, 2/3, 2/3], [-1/3, 4/3], 99/100),50);

is -138.999 + 0.0012 I
 


It should be more like −138.9962313171333091754979138344422738025

(Maple 18, version 991181)

---

G A Edgar

Who knows what Maple does wrong on this one?



T:=Sum(1/(6*k+1)!, k=0..infinity); evalf(T); value(T); evalf(%);

Sum(1/factorial(6*k+1), k = 0 .. infinity)

 

1.000198413

 

(1/6)*3^(1/2)*exp(-1/2)*sin((1/2)*3^(1/2))+(1/6)*3^(1/2)*exp(1/2)*sin((1/2)*3^(1/2))+(1/6)*exp(1/2)*cos((1/2)*3^(1/2))

 

.6739557747

(1)

 



Download sum.mw

Is this really the answer we want?  

> sum(log(n)/n,n=1..infinity);  

Error, (in Zeta) numeric exception: division by zero  

Today I found that login does not work on MaplePrimes.  I changed my password, but still not.

There is no error, I am just returned to the provious page, still not logged in.

Safari 5.1.2, Mac OS 10.6.8

I had to log in using Firefox to post this!

Here is a simple version of the code:

restart;
plots[textplot]([4,2,q[n]]);
plotsetup(gif,plotoutput=`p.gif`);
plots[textplot]([4,2,q[n]]);
plotsetup(default);
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