[seqfan] Re: A000000

[Robert Israel]

On Wed, 16 Jun 2010, N. J. A. Sloane wrote:

> PS and the past tense of "to prove" is "proved", not "proven".
>
>> conjectured to be empty or proven empty.
>
>
> Best regards
> 			 Neil

The past tense is "proved", but the past participle and attributive 
adjective can be either "proved" or "proven".  See e.g.
<http://forum.wordreference.com/showthread.php?t=54120>
<http://books.google.ca/books?id=2yJusP0vrdgC&pg=PA784>

Robert Israel                                israel at math.ubc.ca
Department of Mathematics        http://www.math.ubc.ca/~israel 
University of British Columbia            Vancouver, BC, Canada