My professor draws sigma notation unironically like pic related,

>>8652526
That's half a Schutzstaffel sign right there boy

Perhaps the professor is sigmafying the difference between convergence and divergence with the top and bottom lines of the sigma.

>>8652547
Actually I happen to know he had a stroke some time last semester, I think he used to draw them normally.

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>>8652526
He is trying to tell you something.

>>8652551
You sound like the biggest dick in the universe now.

>indexing by k
>not by i
Drop that shit

>>8652576
It's a lot more common to need 2 indexes than 3, so it is more logical to use k and j (because they do not look alike), rather than i and j. It is still going in alphabetical order, just reversed.

>>8652587
Index by i, then k, then m, then j, then l, then n

>>8652605
You have to do it in alphabetic order to make it clear or it will be a hodgepodge of chaos.

>>8652547
>finite sum
>diverging
yeah okay

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>>8652576
>indexing by i
>not by k

>>8652576
Good luck indexing complex expressions by i

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My professor draws sigma notation unironically like pic related, should I drop the class?
I'm a jew and that's seriously unsettling because I'm the only who is taking that class

>>8652576
>not indexing by j

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>>8652576
>not indexing by n
You people disgust me

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>>8653618
>not indexing by x

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>>8653329

>>8653628
>not using non-latin and non-greek symbols for indexing
literally a pleb

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>>8653686
איי למאו

>>8653697
oy vey anon, oy vey

>>8653697
It's more like איי אהתש

>>8653329
>that guy who draws his 1s like As

I never understood this meme

>>8652605
the fuck?

i,j,k are indexes, m,n are the upper, last term,. (is there a name for that part?)

>>8653732
Better than ones looking like a single stroke, good luck finding out if it's one or modulus sign, or if it's comma or one in subscript

>>8653848
>better than

It's not

>>8653213
this senpai, although sometimes j is used as te complex root of -1 to avoid confusion

>>8653329
I kek'd

>>8653213
Good luck indexing quaternions by k

>>8653697
бджзийцчшщьъэюя

>>8653329
Holy kek

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>>8653686
>not indexing by pepe

>>8654880
Isn't that a hate symbol, anon?

>>8652526
>showing up to lectures
what kind of pleb are you?

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>>8653964
Tы шyчeшь?

>>8652551
Strokes can have very strange effects on people.
Look up hemispatial neglect, for example.

>>8653863
>not indexing j instead of i

>>8654978
Only is you're a liberal faggot