Parasitic Numbers

[ehands]

Sorry, I guess I do not understand the defn I read in Wikipedia,
why isn't 025641 4-parasitic?
After all 4•025641 does =102564.
Thanks

 

[ehands]

Denis,
Thanks!
You seem to supply most of the answers here. Thanks^n!
What editor do you use to create such beautiful equations?
What would you recommend as most convenient for a neophyte?
Do most (some?) word processor equations look good when simply cut and pasted here?

 

[pka]

What editor do you use to create such beautiful equations? What would you recommend as most convenient for a neophyte?

No special program is needed. You can learn to write LaTeX code.
Look at this link