Formulae

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4 total messages Started by Jerry Lotto Sun, 20 Mar 1988 16:02

#841

Author: Jerry Lotto
Date: Sun, 20 Mar 1988 16:02

14 lines
577 bytes

I am surprised that noone has mentioned that:

	f  x
	| e  = F(u,n)
	j

(apologies if someone did post this and I missed it)

J
-- 
Gerald Lotto - Harvard Chemistry Dept.
UUCP:  {seismo,harpo,ihnp4,linus,allegra,ut-sally}!harvard!lotto
ARPA:  lotto@harvard.harvard.edu

Re: Formulae

#856

Author: Mark William Hopkins
Date: Tue, 22 Mar 1988 02:23

24 lines
995 bytes

In article <172@wjh12.harvard.edu> lotto@wjh12.UUCP (Jerry Lotto) writes:
>
>I am surprised that noone has mentioned that:
>
>	f  x
>	| e  = F(u,n)
>	j
>

Well, here is one that not too many people are aware of:

The exponential series formula (pardon my infinity symbol 00)

         x    OO     n
	e  = SUM    x / n!
            n = 0  

has an inverse:

                00     n   x
	n! = INTEGRAL x / e  dx
               x = 0

(related to the Gamma function, for those who know about it.)

Re: Formulae

#881

Author: pax
Date: Tue, 22 Mar 1988 22:20

16 lines
735 bytes

Here is another:





The integral of dcabin/cabin = logcabin + c = houseboat




But the most humorous thing I've seen in this regard is not a formula
at all but a beginner's mistake.  Having seen that 8/0 is infinity,
a student thought that 5/0 is a 5 laid on its side---too bad it is
untypable.

Re: Formulae

#909

Author: Christopher Dollin
Date: Thu, 24 Mar 1988 08:32

12 lines
828 bytes

How about

    8 * sqrt(-1) = infinity

(looks better if the "* sqrt(-1)" is written with root signs and juxtaposition,
and only works when you replace "infinity" with the usual symbol (not aleph!)).

Because a multiplication by i is a rotation through pi/2 radians, don't you
know (said in a Peter Wimsey voice) ........................................

Regards,
Kers                                    | "Why Lisp if you can talk Poperly?"

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