> -----Original Message-----
> From: Li Zefan [mailto:lize...@huawei.com]
> Sent: Wednesday, June 25, 2014 11:44 AM
> On 2014/6/25 11:30, Chen Hanxiao wrote:
> > s/iff/if
> >
> 
> This is not a typo. iff == if and only if.
> 

I see.
Thanks for teaching.

- Chen

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