[GreenKeys] Happy Pi Day!

[Richard Knoppow]

     I was sure you meant i but I see it so rarely now except in 
books. I wonder how it got changed to j for electronic equations.
     I never learned much Fortran but taught myself -hp- Basic 
when I worked there. There is a long story about why I didn't 
become completely engulfed in computers. These were early small 
main frame machines intended to compete with DEC stuff for 
automated instruments. Flashing lights and toggle switches. I may 
still have a basic binary bootstrap tape in a strong box 
somewhere. People collect and restore these now. Terminal was a 
model 33.

On 3/13/2018 6:03 PM, Dave Horsfall wrote:
> On Tue, 13 Mar 2018, Richard Knoppow wrote:
> 
>> Not sure of your notation, what does ** mean, power?.
> 
> Yes (from my FORTRAN days, then Perl etc).  Being a crypto bod, I 
> use "^" to mean XOR (the fundamental crypto operation[*]).
> 
>> Is i the square root of -1?
> 
> Yes; an electrical engineer would've used "j", but I'm a 
> mathematician :-)
> 
> [*]
> Apart from the famed "NSA instruction" on the CDC series, of course.
> 

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL