Osborn's Rule, or Osborne's Rule?

Which is it? :confused:

Is the Mathematician, "G. Osborn"? Mathworld and wikipedia both seem to say Osborne, but I am not sure.

Does anybody know?

(+ve rep available for conclusive evidence :p:

)

Reply 1

nota bene

http://www.google.se/search?q=%22Osborn's+rule%22&ie=utf-8&oe=utf-8&rls=org.mozilla:sv-SE :redface:

fficial&client=firefox-a
29 hits

Google is your friend :wink:

Seems to be more hits on "Osborne's rule" 146 for me :p:

And mathworld, and wikipedia says that as well, so quite reliable I'd suggest

Reply 2

Kolya

Interestingly, all the FM textbooks use Osborn.

Reply 3

nota bene

The rule is not in my course, so hence my book doesn't mention it, so can't compare.

But strange that textbooks would disagree with wikipedia AND mathworld...

However, might it be like many older names that not even the person itself speels the name the same all the time (like Shakespear/Shakespeare)?

Reply 4

Kolya

nota bene

Possibly.

Checking my A level textbook from 1967: it uses "Osborne's".

Reply 5

nota bene

I think I would trust that old book together with wiki+mathworld, and I think 'Osborne' looks nicer :p:

Reply 6

Cexy

I once read that there are eleven valid spellings of 'Shakespeare' despite the fact that we've standardised it today. So 'Osborne' is probably similar. Go with what you like best, no one's going to care that much.

By the way, what is Osborne's rule? I'm sure I've never heard of it!

Reply 7

insparato

Osbornes(whatever) rule is used to turn the trigonometric identities into hyperbolic identities. Basically you change the sign of any product of sine or implied product of sine.

For example