¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
  1. TekScopes
  2. Messages
Single Messages Topics Expanded Polls

Re: Invitation for another exchange of questionably useful information.

Lars Ahlstr?m
 

Yeah, I understand. Its just to accept.



But the whole brain of mine want to give the result [ sqrt(-1) = -1 ]
!!! =)



If I draw a carthesian coordinate system and pinpoint X=1 and Y=1 I get a
square of the sides = 1.

The square is 1. meter, mm, inch, foot or whatever

And if I pinpoint X= -1 and Y= -1 I get a square with the sides -1, and the
area is then -1. foot, inch, yard or whatever.

The root of that square is -1 !!!

The root of -9 is -3 !!! (I think¡­;)



That¡¯s why I cant accept it, I guess. I also see cube root of -1 = -1, no
problem! ;)



But Im just a fool¡­



/Lars







-----Ursprungligt meddelande-----
Fr?n: TekScopes@... [mailto:TekScopes@...] F?r
arthurok
Skickat: den 30 december 2006 23:57
Till: tekscopes@...; Kuba Ober
?mne: Re: SV: [TekScopes] Invitation for another exchange of questionably
useful information.



its a shared "delusion"

----- Original Message -----
From: Kuba Ober
To: tekscopes@yahoogrou <mailto:tekscopes%40yahoogroups.com> ps.com
Sent: Saturday, December 30, 2006 12:02 PM
Subject: Re: SV: [TekScopes] Invitation for another exchange of questionably
useful information.

On Friday 29 December 2006 05:38, you wrote:
That post reminds me of my own high school drama: The j-omega method.

The root of minus 1¡­ still bugs me. Haven¡¯t yet figured it out after 33
years...

For me it was too mind blowing. Had to stop thinking before I got a
±è²õ²â³¦³ó´Ç²õ¾±²õ¡­



And¡­ our teacher back then, was a well known idiot, that (by the rumour)
got a anonymously job advertise in his mail for this teacher job from a
former headmaster. He was totally incompetent as a mathematician teacher,
and had one item in his track record only: as a mechanical instrument tech
at ASEA. He was totally unable to give me the idea (part from my own
brains
lack of fantasy) of the ¡°root of minus one¡±.
Well, it's an abstract concept, I guess it's better treated like one. Your
only "idea" should be of the properties of this number, and some
applications
that suit your interests.

I don't think I have any other "ideas" here. You can go pretty far by just
knowing that the number has "otherwise" normal properties, i.e. you treat it

like any other number that only doesn't "mix" (in addition) with real
numbers. And when you square it, it goes away. I did my grad level
vibrations
course without using any other "higher" properties (whatever those might be)

of sqrt(-1). I guess it shows what a powerful concept it is: only minimal
properties are necessary to extract a lot of mathematical expression power.

Cheers, Kuba

[Non-text portions of this message have been removed]





[Non-text portions of this message have been removed]
Join [email protected] to automatically receive all group messages.