The summation symbol is not a for loop, sorry. Sometimes it can be implemented as a for loop, but in many interesting cases, it cannot.
"Why don't mathematicians use [extremely cursed] pseudocode notation?"

Because we deal with infinities.
Not everything is countable, my naïve friends.
imagining writing this as for loops
Alternatively, when you have -infty to infty
And no you can't just be clever and say

i = 0
s = thing(0)
while true:
s = thing(i) + thing(-i)

because it is an infinite series and you can't necessarily re-arrange them.

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More from @EmilyGorcenski

15 Sep
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Chris Cantwell continues his pro se civil defense by being obsessed with me, crafting elaborate conspiracy theories about me, and misrepresenting reality.

I am not a party to the suit nor am I a deposed witness.
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what ImageImage
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I hate this Image
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Of course they are now almost 20 minutes late, so how long do I sit here?
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It was me
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11 Sep
Look, you all know where I stand on this. But after Richard Spencer got punched, he helped organize Unite the Right, where Heather Heyer was murdered, a rally in Gainesville where three of his security people almost murdered someone and are now in jail, and a Lansing rally.
In the middle of that, he also showed up in Charlottesville two other times with torches: May and October 2017. He organized a rally in DC in April 2017 which was unopposed except by the alt lite.

One punch did not end Richard Spencer’s evil. Dogged, persistent antifascism did.
Richard Spencer is irrelevant now because nearly every time he showed up anywhere he was run out of town. The final straw was an embarrassing showing in Lansing, MI, where he was relegated to speaking at a distant agricultural center to almost no audience. It was humiliating.
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