"Oh shit" moments in Math/Science/etc

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>the representation isn't in the right characteristic so we can't use Maschke's theorem

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>no google results found

>molarity is per liter solution, not per liter solvent
My solutions were fucked up for years

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>>7844076
>inequality doesn't break to either AM-GM or Cauchy-Schwarz

>>7844107
underrated post

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>Greater than 5% error

>>7844137
>>7844107
agreed
You know you've gone far enough when you can't google it anymore

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>>7844124
>tfw still fuck up molality as moles of solute per kg of solution instead of kg of solvent.

>>7844124
are you literally retarded

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>>7844107
>Google it
>find guy on Stack Exchange/some forum with your exact problem
>only reply is that one retard who has to reply to every thread even when he has nothing to contribute

>>7844107
>google it
>forum thread with problem comes up
>posted 3 years ago
>no replies

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>>7844124

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>>7844124
How is it possible to fuck up this badly

>eisenstein's criterion doesn't apply
Might a well assume it's reducible at this point.

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>Triple Integral

>>7844102
Characteristic 0 is the patrician characteristic.

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>Look through stackexchange / physicsforum for solution
> Hey guys I happen to have exact problem that anon has in his problem set
>NM I solved it.
>Thread closed

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>>7844076
>at work
>made an assumption I shouldn't have three months ago
>40% of my work since then has been based on that assumption
>boss: so, you should be able to have it all fixed and ready to go this week, right?

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>search google for answer to problem
>forum post about exact same problem
>answer is solution I've already tried
>thanks guys It worked
>closed

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>timed test
>problem has a lengthy solution
>finish it
>answer isn't any of the choices
>mfw

>>7844076
>adding fractions

>>7844365

[eqn] \sum_{n=1}^{\infty} \frac{\csc^{2}n}{n^{3}} [/eqn]

:^)

The inverse square nature of electromagnetism and gravitation are equivalent to saying the photon and graviton are massless

>>7844234
>Google it
>find guy on Stack Exchange with your exact problem
>only reply is so high level that it requires actual autism to understand.

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>solve for unknown impedance
>get negative resistance

>everything is a function of frequency
>magnetic field is just the electric field in a different frame of reference
>holy shit the people whose ideas I study were so much smarter than I am now or will ever be

>>7844367
Clearly diverges, tbqhwyfam.
The limit as n approaches infinity of that fancy latex shit without the sum does not exist. Lemes Inferior and Lemes Superior bitches get up in here.

>>7844375
Those basic equations are nonvelativistic bruh

>>7844393
geh raus u fucking alleyman

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>look up the precise version of inequality
>it depends critically on the inverse function of a quotient of elliptic integrals

>>7844430

This better be bait anon.

>>7844240

oh god, no, please...

>>7844240
>>google it
>forum thread with problem comes up
>PM'd you the solution :)

>>7844393
you can actually design circuits that do this, so...

>there is actually meaning in every mathematical formula my highschool teachers wrote on the board

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>>7844463
>>7844379
>>7844321
>>7844280
>>7844240
>>7844234

>>7844467
Explain? I'm just a lowly EE student as of right now.

>can't assume AC

>writing test
>Is [result of previous question] true if [something] is replaced by [something else]?
>If so, prove it. If not, provide a counter example.

>>7844694
Those are piss easy if you understand the previous theorem.

>>7844694
I had a prof which would always include five or so T/F + Proof problems. It was delightful since my mind worked roughly the same way as him so I found easy the same things that he thought were easy.

>>7844702
>>7844707
Coming up with page-long counter examples during a 50 minute test is not easy for me.

>>7844597
if you do it right, you can include an op amp in the circuit that will "give back" energy lost from resistive effect in other places of the circuit. This means the op amp is equivalent to a negative resistance.

https://en.wikipedia.org/wiki/Negative_impedance_converter

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>>7844379
lel this is a good one

>the hilbert space has an uncountable orthonormal basis

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>post question from assignment on stackoverflow, /sci/, reddit
>get 5 responses saying that the question is too vague

>>7844076
>f(x)=cos(x)
>f'(x)=sin(x)

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>Bonus question on homework in algebra class:
>Prove that the group of Q-rational points on an elliptic curve are finitely generated

>>7844234
>google a problem
>find board where your exact question was discussed
>only reply is "I have the solution, pm me for it"

The set X of rational numbers is equal to the set 2X.

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>>7844790
>>7844379
>end up learning even more esoteric math just to figure out what he's saying
>still don't finish the problem set in time

>>7844868
"I have the same problem, please help" is worse

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>make a forum post
>"here's a thread outlining the same problem and it's been solved"
>problem isn't remotely like what I have

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>stuck on a question
>go to TA for extra help
>TA guides you to solution. tells you how to get to answer. tells you answer
>follow TA's guidance. solve the question as per TA's suggestions
>get assignment back
>0/5 on question
>see solution online
>answer is completely different than TA's suggestion

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>>7844076
>all standard test of series convergence/divergence fail
>remember that I am studying generating functions
>mfw

>>7844269
classic

>>7844271
hell naw

>>7844453
It's ok, I post like that when I'm drunk.

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>>7844076
>Final question on assignment is bullshit hard
>work for 4 hours or so, finally have solution
>Submit work
>Prof announces in class that the last question was too hard so he's not going to grade it

>>7844841
piss easy over a finite field

>>7846996
that'll get you far over Q...

>>7844818
No, f'(x)= -sin(x)

>>7847552
You're thinking of f'''(x).

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>>7844076
>first test in organic chemistry 1
>assume I can high B/low A that shit without any studying outside of lectures

>U(1) is isomorphic to C*

>>7847601
Is that cheese?

>>7847596
No wonder the trip fag turns out to be retarded.

Cos(x) =(e^(ix)+e^(-ix))/2
Cos'(x)=(ie^(ix)-ie^(-ix))/2
Cos'(x)=(e^(ix)-e^(-ix))/2i
Cos'(x)=-Sin(x)

Like bruh

>>7847652
Oh dammit, you're right. I had my sine and cosine flipped.

This is why we don't us visualizations for formal mathematics.

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>>7844124
I remember how in high school I missed the teacher telling us how you should use kg instead of grams as the only exception to using SI units when putting mass in equations. Fucking use grams for the rest of the year. All my answers are off by a factor of 1000. That was one of my most retarded moments.

>>7847652
I thought he was trolling you hard at first

>>7844357
>timed test
I didn't know there were tests that aren't timed

>>7847694
Honest mistake, no worries.

>>7847713
How do you not realise by the end of your first experiment?

>>7844270
what seems to be the problem senpai?

>>7844365
How's middle school anon?~

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>>7844240

>have a problem with some software
>recently updated too
>google it
>every result doesn't work with the new version


>buy game on steam
>game creator has their own launcher
>doesn't work at all (fuck you ubisoft)


>want to look up a math problem
>google doesn't fucking parse symbols


>want to look up a programming problem
>google doesn't fucking parse symbols


>google a yes/no question in math/physics
>every result argues with each other


>any vague "error code 4098" error
>google it
>no results


>having any problem at all with windows or microsoft programs
>google it
>"have you tried turning it off and turning it back on?" is the only result from their support page


>google issue
>creator of the program replied to forum post about the issue
>"I'll look over my code and see what I can do."
>4 years ago


>google issue
>forum has a solution
>"OH MY GOD IT WORKS" spammed
>the lone few "didn't work for me" gets drowned out
>forum closes
>other forums only reference that exact page


>google issue
>forum: "I made my own script, download it from here: www...."
>link broken
>other forums only reference that exact page

>Left-recursive non-terminal symbols cause deterministic descending parsers to loop infinitely.

>>7848843
>non-terminating*

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>>7844450
I like the intuitive definition. Too bad it's so complicated only a handful of countries have calculated it.

>>7848895
I meant this one inequality in complex analysis which arises from how certain functions preserve this particular geometric property. The sharp version of the inequality is hard to read.