Is there a person who can calculate the exact value of the
following sum using a CAS (not resorting to paper & pencil,
why we need simpler tasks? ;), and add a tiny bit of proof:
sum(1/sqrt(n!)-2/sqrt((n-1)!)+1/sqrt((n-2)!), n= 3..infinity);
?
Best wishes,
Vladimir Bondarenko
GEMM architect
Co-founder, CEO, Mathematical Director
Cyber Tester, LLC
13 Dekabristov Str, Simferopol
Crimea 95000, Ukraine
tel: +38-(0652)-447325
tel: +38-(0652)-230243
tel: +38-(0652)-523144
fax: +38-(0652)-510700
http://www.cybertester.com/
http://maple.bug-list.org/
http://www.CAS-testing.org/
Proof: It's a simple telescope-sum
Here's a puzzle for you:
Think about
Integral (0 to 1) sin^2 (tan (tan (pi * x))) dx
Thomas
"Vladimir Bondarenko" <v...@cybertester.com> schrieb im Newsbeitrag
news:1116008530.4...@g43g2000cwa.googlegroups.com...
"Thomas Schmelzer" <thomas.???@balliol.ox.ac.uk> schrieb im Newsbeitrag
news:d660ef$kf5$1...@news.ox.ac.uk...
PS> I wouldn't encourage Vlad--I blocked his posts
An idea for your life's improvement, Phoebe: maybe you could write
or order an application which suppresses strings like 'Vladimir',
'Bondarenko', 'Maple bug' etc from showing on your screen?
PS> and hate to see people even deal with this person.
It's great that currently you still eschew from direct physical
indiscriminate slaughter of such folks... ;)
PS> I am sure he will have much to lecture us about
PS> when Maple 10 comes out.
Bravo! You hit the nail right on the head.
Like Dmitry Mendeleev was able to predict the existence and
properties of eka-aluminum, eka-boron and eka-silicon, I can
predict, even without seen Maple 10 yet, that there are not
thousands but dozens thousand distinct bug manifestations in
Maple 10. And even venture to name some concrete bugs. For
example, try these in Maple 10:
> iscont(1/(1+z^346), z= 0..1);
My prediction: Maple 10 keeps running after 100,000 seconds.
> limit(LambertW(1, z), z= -exp(-1));
My prediction: Maple 10 keeps running after 128,000 seconds.
> solve(abs(z)*I = sqrt(z), z);
_SolutionsMayBeLost;
My prediction: Maple 10 returns
0
_SolutionsMayBeLost
PS> I am sure he will have much to lecture us about
PS> when Maple 10 comes out.
Yep, unlike you, an amateur, I am a gifted computer science
professional, an algorithmist, an architect, a software tester
whose decade long work has already improved Derive, MuPAD,
Mathematica, and, to an extent, Maple.
http://www.cas-testing.org/SciFace.phtml
Here are more details about me.
http://www.cas-testing.org/index.php?list=3
According to National Institute of Standards and Technology,
software bugs are so prevalent and so detrimental that they
cost the U.S. economy an estimated $59.5 billion annually,
and twice as much over the globe. More than half the costs
are borne by software users and the remainder by software
developers and vendors.
http://www.nist.gov/public_affairs/releases/n02-10.htm
Block whatever you want, hide like an ostrich your head wherever
you prefer, yet please realize that I post not for your personal
entertainment but, for the whole symbolic computation community.
The Cyber Tester's principal investigator, I direct the efforts
of our team keeping resolving a formidable technical challenge,
identifying new opportunities in fighting software bugs & making
software diagnostics as much automated at it is possible at all.
I keep contacting with CAS manufacturers and top CAS folks
since 1993. Find a few selected opinions from them at
http://www.cas-testing.org/index.php?list=7
which belong, respectively, to
COMMENT 1 Albert D. Rich, www.derive.com www.mulisp.com
COMMENT 2 Prof Dr Oleg Marichev, WRI www.functions.wolfram.com
COMMENT 3 Dr Anwar Shiekh, WRI Test Development Group Supervisor
COMMENT 4 Prof Dr Walter Oevel (SciFace GmbH)
COMMENT 5 Dr Anwar Shiekh, WRI Test Development Group Supervisor
COMMENT 6 Dr Anwar Shiekh, WRI Test Development Group Supervisor
COMMENT 7 Dr Anwar Shiekh, WRI Test Development Group Supervisor
COMMENT 8 Dr Michael Wester, www.math.unm.edu/~wester
COMMENT 9 Dr Anwar Shiekh, WRI Test Development Group Supervisor
COMMENT 10 Dr Anwar Shiekh, WRI Test Development Group Supervisor
COMMENT 11 Stefan Wehmeier, SciFace GmbH
COMMENT 12 Dr Anwar Shiekh, WRI Test Development Group Supervisor
COMMENT 13 Kelly Roach, http://home.att.net/~themission/
COMMENT 14 Dr Anwar Shiekh, WRI Test Development Group Supervisor
Here comes a list of countries, Cyber Tester's visitors are from,
Albania, Algeria, Argentina, Armenia, Australia, Austria, Azerbaijan,
Belarus, Belgium, Brazil, Bulgaria, Canada, Chile, China, Colombia,
Costa Rica, Croatia, Cyprus, Czech Republic, Denmark, Dominican
Republic, Egypt, Estonia, Finland, France, Georgia, Germany, Greece,
Hong Kong, Hungary, Iceland, India, Indonesia, Iran, Ireland, Israel,
Italy, Jamaica, Japan, Jordan, Kazakhstan, Latvia, Lebanon, Lithuania,
Luxembourg, Macedonia, Malaysia, Maldives, Mexico, Moldova, Morocco,
Netherlands, New Zealand, Nigeria, Niue, Norway, Pakistan, Peru,
Philippines, Poland, Portugal, Republic of Korea, Romania, Russian
Federation, Saudi Arabia, Singapore, Slovakia, Slovenia, Spain, Sri
Lanka, Sweden, Switzerland, Syrian Arab Republic, Taiwan, Tanzania,
Thailand, Trinidad and Tobago, Turkey, Ukraine, United Arab Emirates,
United States, Uruguay, Venezuela, Viet Nam.
Count 'em, 84 countries, totally.
Raytheon, Oracle, Wolfram Research, Texas Instruments, IBM, NAG
Ltd, Maplesoft, MathWorks, to name several most influential brands
only, visit our sites regularly. There are visits from Microsoft,
Intel, AT&T, NASA, DARPA, DoD, from Hewlett-Packard, Fujitsu,
Baxter, Aerospace Corporation, Glaxo, Lockheed-Martin, Grolier,
Rocket-Space Corporation Energia, and even a couple of visits
from Pentagon.
Developers already spend about 80 percent of development costs on
identifying and correcting defects, and yet few products of any
type other than software are shipped with so many errors.
Within counted months the VM machine being developed under my
leadership will bring new revelations about computer algebra
systems quality problems, unavaliable earlier to error-prone,
fallible human-based testing & rickety semi-automated methods.
The said data will gradually lead to better, faster, smarter
computer algebra systems, a new generation of genuine math
assistants for researchers, engineers and educationalists.
Best wishes,
Vladimir Bondarenko
VM and GEMM architect
> Yep, unlike you, an amateur, I am a gifted computer science
> professional, an algorithmist, an architect, a software tester
> whose decade long work has already improved Derive, MuPAD,
> Mathematica, and, to an extent, Maple.
[patrioticheskie ozhivlenie sredi slushateley]
...
> Block whatever you want, hide like an ostrich your head wherever
> you prefer, yet please realize that I post not for your personal
> entertainment but, for the whole symbolic computation community.
> The Cyber Tester's principal investigator, I direct the efforts
> of our team keeping resolving a formidable technical challenge,
> identifying new opportunities in fighting software bugs & making
> software diagnostics as much automated at it is possible at all.
I propose that we vote the creation of a new, special newsgroup
for Gifted Software Architects, and especially for Great Russian
Scientists, who follow the unforgettable traces of other Great
Scientists like Lysenko, Mitchurin, Djugashvili, and whose
improvements of the world we live (and their correction of the
imperialist bourgeois bugs) are still visible here and there.
[Burnye aplodismenty, perekhodyashtshiye v ovatsiy].
Jerzy Karczmarczuk
http://groups-beta.google.com/group/sci.math.symbolic/msg/7ce72e2f27029814?hl=en
> Vladimir Bondarenko wrote:
>> Phoebe Swank wrote:
JK> I propose that we vote the creation of a new, special newsgroup
I propose that we vote the creation of a new, special newsgroup
for Jerzy Karczmarczuk.
Best wishes,
Vladimir Bondarenko
Evidently, they don't read the newsgroups.
Vladimir, in spite of many posts trying to explain that to you, you don't
want to see the problem. There are 2 different things. One - finding bugs
and posting it on your web site - good. Another one - flooding 5 newsgroups
with daily bug reports - bad.
Alec
> COMMENT 1 Albert D. Rich, www.derive.com www.mulisp.com
> COMMENT 2 Prof Dr Oleg Marichev, WRI www.functions.wolfram.com
> COMMENT 3 Dr Anwar Shiekh, WRI Test Development Group Supervisor
> COMMENT 4 Prof Dr Walter Oevel (SciFace GmbH)
> COMMENT 8 Dr Michael Wester, www.math.unm.edu/~wester
> COMMENT 11 Stefan Wehmeier, SciFace GmbH
> COMMENT 13 Kelly Roach, http://home.att.net/~themission/
AM> Evidently, they don't read the newsgroups.
What a pity... maybe you would write them?
AM> Vladimir, in spite of many posts trying to explain that to
AM> you, you don't want to see the problem.
Well... I seem to have already explained this a couple of times...
Maple bugs: Backward compatibility - 1
http://groups-beta.google.com/group/sci.math.symbolic/msg/34491458d8751672?hl=en
"Your words mean that, step by little step, I am reaching one
of my grand goals which is creating the surroundings supported
by powerful techniques and services within which it will be
only possible to sell the customers competitive Maple and not
a mathematical parody we, the Maple customers, have under the
name of Maple 9/Maple 9.5... having paid a pretty penny.
Also please realize that you seem to be not a Maple customer,
while I am, and quite a thousands, to put it mildly, of persons
are. And the issue I am starting touching is actually not about
Maple quality & prospect & Maplesoft survival only, but also
about Mathematica, MuPAD, AXIOM, Macsyma, Maxima and *any*
computer algebra system.
In fact, via the Maple case study, I am launching a dialogue
about the quality of any large & influential computer algebra
system, be it an existent one or a future system to be designed
and implemented in 20 years, about how to develop such a system
delivering its powers intact from version to version while,
at worst, keeping the total number of bug manifestations not
growing, how to reduce the overhead costs during the development
and maintenance.
Don't you see that the current status of computer algebra
systems is a far cry from what one could expect seeing a
great inspirational beginning of the 60s-70s, Dr Hearn's
Reduce, your Macsyma? Don't you see that we got stuck in
a mire of screwed buggy environments, each ridiculous it
own way?
Had the queen would be naked, it would be an attractive picture
for my man's eye, - but the problem is that we have comical
emperor's new clothes instead of noble eternal feminine nude.
I am commencing a dialogue about expanding of computer algebra
impact on industry & education, about more markets for computer
algebra systems, and more customers for computer algebra
manufacturers."
Couldn't I indulge myself in a yet another self-quotation?
http://groups-beta.google.com/group/sci.math.symbolic/msg/d1a3c484cd3ae0a6?hl=en
"Could I remind you that you are absolutely free to ignore
all my messages... or read them... Well, or read part of
them. Or read on Sunday, and ignore the rest of days etc.
In a word, there seems to be quite a number of choices.
Aha, I came near forgetting, or attempt solving my harder
challenges coming.
Please do as you wish.
I understand that a person of significant drive like you
not understanding, currently, the true reasons behind these
messages is yawning your life away. By sending your message
you maybe demand more decisive action from me.
All in good time.
If however you like playing chess you realize that there
is stuff like positional game and combinative game, there
is stuff like opening, endgame, gambit etc
Anyway, I think that you are too clever to have real hope
of shaking the serenity of mind of such a strong player
like me via such a child's remark.
Keep your chin up,
life is good
Vladimir"
AM> There are 2 different things.
I agree with you about the existence of the dichotomy... but it
looks like I have a viewpoint that differs a bit from yours. So,
how I see those 2 different things?
One - Maple experts and customers who helps me, or at least do
not make attempts to tell me what to do, in my carefully designed
large-scale effort to force Maplesoft to go beyond these bells and
whistles and produce, at least, something not so much loathsome as
the bug-ridden Maple 9/9.5.
Another one - please take the negation from 'One'.
AM> finding bugs and posting it on your web site
Good. Keep doing. Yet, this is NOT enough to resolve the task.
AM> daily bug reports
"Daily"? Oh thank you for a fresh idea.
To get serious, an integral part of my plan is maximal Maple
bugs exposure.
Maximal publicity. Let even each penguin in cool snow-white
Antarctica learns about Maple bugs. (Now you were complaining
about 5 newsgroups... you really underestimate me :)
But all in good time.
Best wishes,
Vladimir
> Vladimir, in spite of many posts trying to explain that to you, you don't
> want to see the problem. There are 2 different things. One - finding bugs
> and posting it on your web site - good. Another one - flooding 5 newsgroups
> with daily bug reports - bad.
There are at least three different things. The third one is the
behaviour
of an - apparently adult - person, whose ego reached the stage needing
a competent psychiatrist. The point is that usually people who need a
psy, won't admit it...
[The standard answer will be, as usual: it is YOU who need a psy!]
It not only flooding of newsgroups which is bad, but the insulting
slogans, as taken directly from an Ancien Régime era...
Perhaps somebody would raise some funds and *pay* Bondarenko, so that
he would stick to his - possibly - useful work, and remain quiet?
J. Karczmarczuk
--
Posted via Mailgate.ORG Server - http://www.Mailgate.ORG
http://groups-beta.google.com/group/comp.soft-sys.math.maple/msg/12837905fcfba1be?hl=en
JK> person, whose ego reached the stage needing a competent
JK> psychiatrist.
Yep... I readily admit publicly that I got fully deranged...
small wonder... I use Maple 9/9.5... for many many hours a day...
JK> a competent psychiatrist.
'competent'... oh this not will do... maybe only a psy star
could relieve a bit the eerie tortures my old good (formerly)
rigorous logics experiences having Maple 9/9.5 (now Maple 10
soon) constantly before my eyes...
(Ah Jerzy, Jerzy, please realize, you are a lucky beggar. As
of today, you even have no idea of how many there are thosands
distinct Maple bugs... enjoy life... never read my posts...
or you would run risk ending like me, a poor thing...)
Yet another idea. Maybe Maplesoft would manage at last produce
say, Maple 12, with a reasonably decent math correctness level?
Best wishes,
Vladimir Bondarenko
P.S.
Guys & gals, 'pon my word, 2 years ago, I was a healthy
person... then Maple 9 was released... tears are running
down my haggard cheeks...
Warning:
Do NOT visit these sites... if you have minimal
math knowlenge, data there could be dangerous
for your mental health.....
>> iscont(1/(1+z^346), z= 0..1);
>
>My prediction: Maple 10 keeps running after 100,000 seconds.
It returns true in 5.359 seconds.
Robert Israel isr...@math.ubc.ca
Department of Mathematics http://www.math.ubc.ca/~israel
University of British Columbia Vancouver, BC, Canada
> To get serious, an integral part of my plan is maximal Maple
> bugs exposure.
There is a fine line to thread. The huge amount of posts
simply makes people ignore them.
How many technically responses to your bug reports
have you had lately on usenet?
--
Jens Axel Søgaard
Jerry,
He is in my filter list, so I don't see his posts and had no idea about
that - just the number of posts. I just read one his of posts to check that
and found out that you are absolutely right. One can see significant change
of style comparing with his posts about a year ago - then they were just bug
reports.
Alec
Not quite clear for me...
Alec, please explain what do you mean by "Evidently, they don't read
the newsgroups." ?
What do you mean here?
What is the implication?
Thanks in advance.
Vladimir
http://groups-beta.google.com/group/sci.math.symbolic/msg/0b3e25727229d12c?hl=en
Thank you for help.
What about two other my predictions from the same message?
...................................................
> limit(LambertW(1, z), z= -exp(-1));
My prediction: Maple 10 keeps running after 128,000 seconds.
.................................................................
> solve(abs(z)*I = sqrt(z), z);
_SolutionsMayBeLost;
My prediction: Maple 10 returns
0
_SolutionsMayBeLost
.................................................................
Thank you for replying in advance.
http://groups-beta.google.com/group/comp.soft-sys.math.maple/msg/a1bca2eaad8d8706?hl=en
>> "Vladimir Bondarenko" <v...@cybertester.com> wrote in message
>> news:1116503593....@f14g2000cwb.googlegroups.com...
VB> What do you mean here?
VB> What is the implication?
AM> The implication is that you, Vladimir, unfortunately, being
AM> a good tester and quite a bright guy in general, created a
AM> pretty bad reputation in these 5 newsgroups.
At times, I wonder what reputation I created in the Maplesoft's
owners and top officers?
;)
Even more, what reputation I will create in the Maplesoft's owners
and top officers, but, mainly, in the computer algebra community
via publishing the next layer of results calculated automatically
by the VM machine?
;-)
Vladimir
> At times, I wonder what reputation I created in the Maplesoft's
> owners and top officers?
>
> Even more, what reputation I will create in the Maplesoft's owners
> and top officers, but, mainly, in the computer algebra community
> via publishing the next layer of results calculated automatically
> by the VM machine?
[Most followup nsgroups removed, since it is plainly stupid and nasty
to send it to sci.math, educational or recreational math]
You really don' know what reputation you will maintain (*not* create)?
Well, verify it experimentally.
Apply for a job in an establishment where people know something about
computer algebra (and they are aware of your "social activity").
Then, send us the (rare) answers you would get.
http://groups-beta.google.com/group/sci.math.symbolic/msg/a9980ce1fd9ce5b2?hl=en
'Fraid, your answer shows nothing but your total misunderstanding of
what I have done, do and going to do.
:)
JC> Apply for a job
Buddy, ye gotta be kiddin'!
Why on earth me, the principal owner of a soft company, a person
who has enough money to feed a team of programmers, and enough
strong ideas to make even more money, and to change, within a
reasonable span of time, the sad status quo in modern computer
algebra math correctness, could even think of proceeding with
a miserable, ridiculous idea that you have just proposed?
Visit again the Cyber Tester sites, and realize that even 1 pro
mille of data we have calculated is not uploaded yet, as of today.
Then think again about what you have proposed to me.
Best wishes,
Vladimir Bondarenko
> > ... what reputation I will create in the Maplesoft's owners
> > and top officers, but, mainly, in the computer algebra community
and I proposed
> Well, verify it experimentally.
> Apply for a job in an establishment where people know something about
> computer algebra (and they are aware of your "social activity").
His reply is:
> Why on earth me, the principal owner of a soft company, a person
> who has enough money to feed a team of programmers, and enough
> strong ideas to make even more money, and to change, within a
> reasonable span of time, the sad status quo in modern computer
> algebra math correctness, could even think of proceeding with
> a miserable, ridiculous idea that you have just proposed?
[Again, I removed the redundant folowup nsgroups, since one has to
be a clinical idiot to send this rubbish to sci.math, or to
educational/recreational math]
I believe that V. Bondarenko is not capable of understanding the
simplest logic. I don't care whether he *needs* a job (somebody
reading this cares?...), I just proposed a tangible way to test his
reputation, this is as obvious as that.
Anyway, it is time to flush down this thread, despite the involuntary
sparkling humour in the postings of this "gifted architect" with
plenty of money and even more of ideas...
http://groups-beta.google.com/group/sci.math.symbolic/msg/16ca1e7dd9c6152d
JK> is not capable of understanding the simplest logic.
Look here, Jerzy,
I am sad to observe that, message by message, your style
seem to getting more and more offensive wrt me. Sure if
you are going to proceed along this line I would be forced
to ask your superiors to provide you with an extra vacation
time because you seem to getting too hot and obviously
need some spare time to rest.
Also, I propose you to improve your understanding of English
and/or sense of humor to the level that you would be able to
realize that my question you referred to, namely
VM> At times, I wonder what reputation I created in
VM> the Maplesoft's owners and top officers?
is just a rethoric question, and sure is not supposed to be
commented, the more especially in your fascion.
Best wishes,
Vladimir Bondarenko
"Vladimir Bondarenko" <v...@cybertester.com> wrote:
> Why on earth me, the principal owner of a soft company, a person [...]
I think this "company" exists solely in your imagination.
Formally, you might even have founded one. (I don't know how that is
done in Ukraine.)
But what would be its business model? Flooding newsgroups with nonsense?
Do you actually have any customers? Could you list a few of them?
You might realize that it's a bad idea to affront potential partners.
Publishing e-mails without asking authors for permission is another one.
Your credibility is far below SCO's, if you know what that means.
And please accept the most basic rules of communications, in particular
those for Usenet newsgroups.
Not that I expect any reasonable answer...
--
Thomas Richard
Maple Support
Scientific Computers GmbH
http://www.scientific.de
http://groups-beta.google.com/group/sci.math.symbolic/msg/1bf371091b91e43d?hl=en
TR> I think this "company" exists solely in your imagination.
So you selected to proceed with an increase
of level of confrontation with me...
No problem.
You are asking for it. Take it.
Please find the message titled
Maplesoft, Inc: A letter of recommendation for Herr Richard,
Scientific Computers GmbH
Best wishes,
Vladimir Bondarenko
VM and GEMM architect
"Vladimir Bondarenko" <v...@cybertester.com> wrote:
> So you selected to proceed with an increase
> of level of confrontation with me...
As expected: No answers to my questions, thus no customers, no company.
> Please find the message titled
>
> Maplesoft, Inc: A letter of recommendation for Herr Richard,
> Scientific Computers GmbH
What a heap of nonsense. No further comments necessary.
> What a heap of nonsense. No further comments necessary.
Just the last one. Some people here, both you and I included,
are guilty of feeding the troll.
This fellow Bondarenko visibly suffers from a heavy mental disorder.
The point is that Usenet is absolutely helpless against those
mythomaniacs. Insane people usually deserve some compassion, because
their irrational attitude, such as flooding several innocent newsgroups
with all that rubbish, is conditioned by their illness, but I understand
that sometimes we lose our temper... After all we are not psychiatrists.
Anyway, we *MUST* ignore him, this is the only way. Finally he will
give up, perhaps change the target. Or perhaps he will be compelled
by somebody to undergo a medical treatment...
Jerzy Karczmarczuk