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Topic: The Charlwood Fifty
Replies: 52   Last Post: Jun 24, 2013 10:24 PM

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Nasser Abbasi

Posts: 5,674
Registered: 2/7/05
Re: The Charlwood Fifty
Posted: Jun 10, 2013 7:14 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On 6/10/2013 5:23 AM, clicliclic@freenet.de wrote:

>
> I noticed that your MMA and Rubi integrands for problem #7 have and
> extra outer root.


opps, thanks. I just corrected this

http://www.12000.org/my_notes/ten_hard_integrals/index.htm

>
> I strongly suspect that "Sage" always means "Maxima" (not e.g. "Sympy"):
> see the Runtime Error Message for problem #8.
>
> Rubi's SUBST means "substitute": SUBST(a+b,b,c+d) = a+(c+d). Since
> Rubi's answer to problem #3 contains an unresolved integral inside the
> SUBST statemant, it must be counted as "not done".
>
> Martin.
>


Ok, the score now looks like this then: (Mathematica gained one, since
it can now do 7, and Rubi4 lost one, since 3 did not count as did)

1. Mathematica: did 1,2,3,4,6,7,8,9,10 did not: 5
2. Maple: did 1,2,3,4,5,6,7,8 did not: 9,10
3. Rubi4: did 2,4,5,6,7,8,9,10 did not: 1,3
4. Sage: did: 1,2,3,4,7,9 did not: 5,6,8,10

btw, Sage 5.4 gives

-1/3 ln(cos(x)^3+1)

for #7 while the optimal result is given as

-2/3 arctanh(sqrt(1+sec(x)^3))

Is the reason the optimal form is prefered over Sage's becuase
it does not contain a log even though Sage answer is smaller in
terms of leaf count?

ps. I used Sage notebook web server http://www.sagenb.org/ versionn
5.4

--Nasser




Date Subject Author
5/23/13
Read The Charlwood Fifty
Albert D. Rich
5/23/13
Read Re: The Charlwood Fifty
Nasser Abbasi
5/23/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/16/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/16/13
Read Re: The Charlwood Fifty
Nasser Abbasi
6/17/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/17/13
Read Re: The Charlwood Fifty
Nasser Abbasi
6/17/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/17/13
Read Re: The Charlwood Fifty
Nasser Abbasi
6/17/13
Read Re: The Charlwood Fifty
Waldek Hebisch
6/18/13
Read Re: The Charlwood Fifty
Albert D. Rich
6/24/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/24/13
Read Re: The Charlwood Fifty
Albert D. Rich
5/23/13
Read Re: The Charlwood Fifty
Albert D. Rich
5/23/13
Read Re: The Charlwood Fifty
Waldek Hebisch
5/24/13
Read Re: The Charlwood Fifty
Andreas Dieckmann
5/25/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/1/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/3/13
Read Re: The Charlwood Fifty
Albert D. Rich
6/6/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/6/13
Read Re: The Charlwood Fifty
Nasser Abbasi
6/6/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/8/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/8/13
Read Re: The Charlwood Fifty
Albert D. Rich
6/8/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/8/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/9/13
Read Re: The Charlwood Fifty
Albert D. Rich
6/9/13
Read Re: The Charlwood Fifty
Nasser Abbasi
6/9/13
Read Re: The Charlwood Fifty
Albert D. Rich
6/9/13
Read Re: The Charlwood Fifty
Nasser Abbasi
6/10/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/10/13
Read Re: The Charlwood Fifty
Nasser Abbasi
6/10/13
Read Re: The Charlwood Fifty
Nasser Abbasi
6/12/13
Read Re: The Charlwood Fifty
Nasser Abbasi
6/13/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/13/13
Read Re: The Charlwood Fifty
Nasser Abbasi
6/13/13
Read Re: The Charlwood Fifty
Waldek Hebisch
6/13/13
Read Re: The Charlwood Fifty
Nasser Abbasi
6/13/13
Read Re: The Charlwood Fifty
Waldek Hebisch
6/14/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/14/13
Read Re: The Charlwood Fifty
Waldek Hebisch
6/14/13
Read Re: The Charlwood Fifty / Sage and sympy
Richard Fateman
6/14/13
Read Re: The Charlwood Fifty
clicliclic@freenet.de
6/9/13
Read Re: The Charlwood Fifty and Macsyma
Richard Fateman
6/9/13
Read Re: The Charlwood Fifty and Macsyma
Albert D. Rich
6/9/13
Read Re: The Charlwood Fifty, another Macsyma result
Richard Fateman
6/9/13
Read Re: The Charlwood Fifty, another Macsyma result
Albert D. Rich
6/10/13
Read Re: The Charlwood Fifty, another Macsyma result
Richard Fateman
6/10/13
Read Re: The Charlwood Fifty, another Macsyma result
clicliclic@freenet.de
6/10/13
Read Re: The Charlwood Fifty, another Macsyma result
Waldek Hebisch
6/11/13
Read Re: The Charlwood Fifty, another Macsyma result
Nasser Abbasi
6/11/13
Read Re: The Charlwood Fifty, another Macsyma result
clicliclic@freenet.de
6/11/13
Read Re: The Charlwood Fifty, another Macsyma result
Nasser Abbasi

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