Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » sci.math.* » sci.math

Topic: cube root of a given number
Replies: 112   Last Post: Jan 10, 2013 1:39 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
gwh

Posts: 93
Registered: 8/14/05
Re: cube root of a given number
Posted: Jul 24, 2007 5:07 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On Jul 24, 9:36 am, arithmonic <djes...@gmail.com> wrote:
> On 24 jul, 06:44, "sttscitr...@tesco.net" <sttscitr...@tesco.net>
> wrote:
>

> > Your historical claim may well be true, but at
> > least one poster states he has a reference predating your
> > claim. It would be interesting if he could post the method
> > he found in the Handbook

>
> It is not just a problem on the false and unethical statements of your
> friend Grover Hughes who
> allegued that my methods were exactly the same than those from
> Eshbach's, 1945
> "Handbook of Engineering Fundamentals".
> You endorsed his unethical claim and stated that he was right and my
> methods were not new, at all.
>
> You and him are now facing nonethical, false and negligent statements
> before the sci.math audience.
>
> Grover Hughes WILL NOT be able to prove his claim and you know that.
>

-
> You and your friend Grover Hughes have not proved what you claimed
> about Hurtwitz and Eshbach, that's why I repeat to you:
>
> NOTICE that your friend Grover Hughes have not shown any single proof
> of what he claimed, and
> left the discussion. what a cheek, indeed. That is totally unethical.



My, my! Leave town for a few days, and look what happened while my
back was turned! I've never been so popular before, and all because I
remarked that an old text showed how to extract cube roots! Well, here
it is-- I'll do the best I can to type it in a form that I hope will
be readable. If anyone's interested, I'll be happy to scan the page
and email it directly to you-- just ask. Anyway, here's what page 2-04
of Handbook of Engineering Fundamentals", edited by Ovid . Eshbach,
copyright 1936 , gives, to find the cube root of 158252.632929 :

158 252. 632 929 |
54.09
5^3 = 125
_____
300 X 5^2 = 7500 | 33 252
30 X 5 X 4 = 600 |
4^2 = 16 |
_____|
8116 | 32 464
300 X 540^2=87480000 | 788 632 929
30 X 540 X 9= 145800 |
9^2 = 81 |
_________ |
87625881 | 788 632 929

I know that it would have been better had Eshbach chosen a number
which was not a perfect cube, but the method works fine for that case,
anyway--- I used it sometimes to check my slide rule value, for
greater precision....

Sorry about the clumsy presentation, but that's the best I know how to
type this stuff-- the lines above which are blank except for an
underline are supposed to appear directly under the 4^2 = 16
and 9^2 = 81
but I can't underline and type numbers at the same time. Is there a
way?

Eshbach of course gives a written explanation for each step, but to
save all of us time, I am assuming that everyone reading this is
perfectly capable of working that out for himself. If you do want the
entire text from Eshbach, lemme know and I'll either email it (as I
said earlier) or I'll type it out and post it here some day soon-- I
don't look at sci.math every day, just when I feel like it, so forgive
the time lapse. Write me directly if you wish, at ghughes@cei.net.

BTW, does arithmonic always get so excited and upset? I never intended
to help his ulcer along......

Regards,

Grover Hughes retired engineer, Sandia National Laboratories



Date Subject Author
4/20/04
Read cube root of a given number
vsvasan
4/20/04
Read Re: cube root of a given number
A N Niel
4/20/04
Read Re: cube root of a given number
Richard Mathar
7/14/07
Read Re: cube root of a given number
Sheila
7/14/07
Read Re: cube root of a given number
amzoti
7/14/07
Read Re: cube root of a given number
quasi
7/14/07
Read Re: cube root of a given number
arithmeticae
7/16/07
Read Re: cube root of a given number
Gottfried Helms
7/16/07
Read Re: cube root of a given number
Iain Davidson
7/21/07
Read Re: cube root of a given number
arithmetic
7/21/07
Read Re: cube root of a given number
arithmetic
7/21/07
Read Re: cube root of a given number
Iain Davidson
7/21/07
Read Re: cube root of a given number
arithmetic
7/22/07
Read Re: cube root of a given number
Iain Davidson
7/22/07
Read Re: cube root of a given number
arithmetic
7/22/07
Read Re: cube root of a given number
Iain Davidson
7/23/07
Read Re: cube root of a given number
arithmetic
7/24/07
Read Re: cube root of a given number
Iain Davidson
7/24/07
Read Re: cube root of a given number
arithmetic
7/24/07
Read Re: cube root of a given number
arithmetic
7/24/07
Read Re: cube root of a given number
Iain Davidson
7/25/07
Read Re: cube root of a given number
arithmetic
7/24/07
Read Re: cube root of a given number
gwh
7/25/07
Read Re: cube root of a given number
arithmetic
7/25/07
Read Re: cube root of a given number
Iain Davidson
7/25/07
Read Re: cube root of a given number
arithmetic
7/25/07
Read Re: cube root of a given number
Iain Davidson
7/25/07
Read Re: cube root of a given number
arithmetic
7/25/07
Read Re: cube root of a given number
arithmetic
7/25/07
Read Re: cube root of a given number
Iain Davidson
7/25/07
Read Re: cube root of a given number
arithmetic
7/26/07
Read Re: cube root of a given number
Iain Davidson
7/26/07
Read Re: cube root of a given number
arithmetic
7/26/07
Read Re: cube root of a given number
Iain Davidson
7/26/07
Read Re: cube root of a given number
arithmetic
8/6/07
Read Re: cube root of a given number
arithmetic
7/26/07
Read Re: cube root of a given number
semiopen
7/26/07
Read Re: cube root of a given number
Iain Davidson
7/26/07
Read Re: cube root of a given number
semiopen
7/26/07
Read Re: cube root of a given number
arithmetic
7/26/07
Read Re: cube root of a given number
semiopen
7/26/07
Read Re: cube root of a given number
arithmetic
7/26/07
Read Re: cube root of a given number
Iain Davidson
7/27/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
Iain Davidson
7/27/07
Read Re: cube root of a given number
Iain Davidson
7/27/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
Iain Davidson
7/27/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
Iain Davidson
7/27/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
Iain Davidson
7/27/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
Iain Davidson
7/27/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
Iain Davidson
7/28/07
Read Re: cube root of a given number
arithmetic
7/28/07
Read Re: cube root of a given number
Iain Davidson
8/5/07
Read Re: cube root of a given number
arithmeticae
8/5/07
Read Re: cube root of a given number
Iain Davidson
8/6/07
Read Re: cube root of a given number
arithmetic
8/6/07
Read Re: cube root of a given number
Iain Davidson
8/6/07
Read Re: cube root of a given number
arithmeticae
8/7/07
Read Re: cube root of a given number
Iain Davidson
8/7/07
Read Re: cube root of a given number
mike3
8/10/07
Read Re: cube root of a given number
arithmetic
8/10/07
Read Re: cube root of a given number
Iain Davidson
8/11/07
Read Re: cube root of a given number
r3769@aol.com
8/11/07
Read Re: cube root of a given number
Iain Davidson
8/11/07
Read Re: cube root of a given number
r3769@aol.com
8/11/07
Read Re: cube root of a given number
Iain Davidson
8/11/07
Read Re: cube root of a given number
r3769@aol.com
8/12/07
Read Re: cube root of a given number
Iain Davidson
8/17/07
Read Re: cube root of a given number
r3769@aol.com
8/12/07
Read Re: cube root of a given number
arithmetic
8/13/07
Read Re: cube root of a given number
Iain Davidson
8/24/07
Read Re: cube root of a given number
arithmetic
8/28/07
Read Re: cube root of a given number
narasimham
1/10/13
Read Re: cube root of a given number ...
Milo Gardner
8/28/07
Read Re: cube root of a given number
arithmetic
8/28/07
Read Re: cube root of a given number
Iain Davidson
8/7/07
Read Re: cube root of a given number
mike3
8/7/07
Read Re: cube root of a given number
Iain Davidson
8/10/07
Read Re: cube root of a given number
arithmetic
8/10/07
Read Re: cube root of a given number
arithmetic
7/28/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
arithmetic
7/27/07
Read Re: cube root of a given number
arithmetic
7/26/07
Read Re: cube root of a given number
Iain Davidson
7/26/07
Read Re: cube root of a given number
arithmetic
7/25/07
Read Re: cube root of a given number
Iain Davidson
7/26/07
Read Re: cube root of a given number
arithmetic
7/22/07
Read Re: cube root of a given number
arithmetic
7/21/07
Read Re: cube root of a given number
arithmetic
7/16/07
Read Re: cube root of a given number
Proginoskes
7/21/07
Read Re: cube root of a given number
arithmetic
7/22/07
Read Re: cube root of a given number
Proginoskes
7/22/07
Read Re: cube root of a given number
Virgil
7/22/07
Read Re: cube root of a given number
Proginoskes
7/23/07
Read Re: cube root of a given number
arithmetic
7/23/07
Read Re: cube root of a given number
arithmetic
7/24/07
Read Re: cube root of a given number
Proginoskes
7/16/07
Read Re: cube root of a given number
gwh
7/17/07
Read Re: cube root of a given number
Iain Davidson
7/21/07
Read Re: cube root of a given number
arithmetic
7/21/07
Read Re: cube root of a given number
arithmetic
7/21/07
Read Re: cube root of a given number
arithmetic
7/24/07
Read Re: cube root of a given number
pomerado@hotmail.com
7/25/07
Read Re: cube root of a given number
orangatang1@googlemail.com

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.