Orchid XP v8 escreveu:
>>> So, I'm not formally trained in mathematics at all. Normally, I can
>>> muddle through. I kept seeing the following mysterious symbol: Π
>>>
>>> Err... what on earth?
>>
>> looks like pi to me...
> 
> It *is*. It's the uppercase Greek letter pi (whereas the famous 
> mathematical constant is the lowercase pi.) And the summation symbol is 
> the (uppercase) Greek letter sigma...

neverending revelations... pi *has* uppercase... *head spins*

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