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Beware: u/porcupineouch is a malicious troll. Ignore him. by jimmy_riggerin learnmath

[–]porcupineouch -2 ポイント-1 ポイント

The problem is that I've explained repeatedly that I do not deliberately post wrong comments. I think that's truly awful behavior. I have always tried to help out in these subreddits or written little obvious "jokes", so sue me if you don't have my sense of humor.

http://www.reddit.com/r/learnmath/comments/28prq3/calculus_why_does_int_03_2x3_mathrmdx_equal_zero/cid9yvk

In your first reply to me, you had already assumed that I was a troll. In all your PMs to me, you stubbornly clung to that notion. You didn't ask me to stop and patiently explain my errors like Acekool did, and say that I need more experience and shouldn't give advice without learning more. You assumed the worst of me. When I needed you, you were unapproachable, cold, immovable and unyielding, like a marble statue. Tell me, who doesn't get angry when their well-meaning efforts are so casually dismissed without even an explanation of why the logic is bad?

Beware: u/porcupineouch is a malicious troll. Ignore him. by jimmy_riggerin learnmath

[–]porcupineouch -4 ポイント-3 ポイント

Did you not read my response right below? I said it is hard to remember the formula for tangent even after being in graduate school. I didn't say I was in graduate school myself. You cannot conclude that I was talking about myself - I could have some senile friends from XXX school who can't remember that formula (prove me wrong). There is no contradiction here.

But whatever, I always knew you were a horrible two-faced person, like I said in my reply.

I am such a martyr; I'm going to be sacrificed like Joan of Arc. Sigh.

Beware: u/porcupineouch is a malicious troll. Ignore him. by jimmy_riggerin learnmath

[–]porcupineouch -4 ポイント-3 ポイント

Firstly, I'm not a troll. Look at this:

http://np.reddit.com/r/cheatatmathhomework/comments/28sw97/verifying_a_trig_identity/cie4oqf

It's being downvoted when there's no error at all. I'm being targetted by a witchhunt.

Secondly, he was just quoting one of my jokes on this reddit since an OP was asking about advice to help her boyfriend relax. I also gave some other math studying tips, so it wasn't all sex. But I found it helped. But predictably, the mathematical community hates slightly immature jokes about sex and wants to kill anyone who makes one - I'm sorry but that's my childish humor. No need to get extremely butthurt about it. Just downvote and move on if you really want to. But ban?

Proving a function has at most one critical point by Mokeymokiein cheatatmathhomework

[–]porcupineouch -1 ポイント0 ポイント

OK, there are no mistakes here and this is actually a proof of the "obvious" fact of strictly increasing functions used by AFairJudgement but someone just blindly downvotes. (Why is there a unique c? Shouldn't we justify that in analysis?) What an open-minded mathematician that person is (or not a mathematician and does not understand anything said here - not that I have anything against that since I too, have no formal math education - but you shouldn't downvote for no reason if you have no idea what others saying). Thanks for giving me a chance guys, when I'm clearly not trolling (which I never was anyway).

Calc 2, triple integral by aquancein learnmath

[–]porcupineouch -1 ポイント0 ポイント

OK, my mistake about the boundary conditions. But what's the problem? Can't you just integrate x2 +y2 +z2 over z from 0 to a-x-y (to give you x2 z +y2 z + z3 /3 which you then evaluate at the boundaries of 0 and a-x-y), then integrate over y from 0 to a-x since there is no more z term (you have the definite integral from before and do the same thing again) and finally integrate over x from 0 to a?

Verifying a trig identity by Wildbarleyin cheatatmathhomework

[–]porcupineouch -4 ポイント-3 ポイント

(cos2 n - 3 cos n +2) = (cos n - 1) (cos n - 2)

So (cos2 n - 3 cos n +2)/ sin2 n = -(2-cos n) (cos n -1)/ sin2 n =-(2-cos n) (cos n - 1)/ (1-cos2 n) = -(2-cos n) (cos n -1)/((1-cos n) (1+cosn)) =(2-cos n) / (1+cosn))

Calc 2, triple integral by aquancein learnmath

[–]porcupineouch -2 ポイント-1 ポイント

How did you get these from the given bounds? Are you sure the quoted expression below is equivalent to your given bounds?

0<=x<=a 0<=y<=a-x 0<=z<=a-x-y

Have you tried doing it directly?

[Integral Calculus] Integral of odd functions with (-∞,∞) by IdonotevenLBin learnmath

[–]porcupineouch -2 ポイント-1 ポイント

Additionally, if we take lim n->∞ ∫ [-n,n] x3 dx = 0, this works just find.

People hate me and say I'm always wrong so keep that in mind. I think I'm wrong here lol but whatever/

In general, we cannot just interchange limits with other analytical symbols like integrals.

lim n->∞ ∫ [-n,n] x3 dx = lim n-> ∞ ( 0) is not valid in general (but there may be some continuity sufficient conditions, I'm not entirely certain).

But ∫ [-∞,∞] x3 dx = lim n->∞ ∫ [0,n] x3 dx + lim n->∞ ∫ [-n,0] x3 dx by one definition of improper integrals (what definition do you use?). Like Robus says, this is inf - inf, which does not make sense.

Should I retake a class? [calculus] by lifthard_swoulerin learnmath

[–]porcupineouch -2 ポイント-1 ポイント

okies i don't really know anything much and people hate me here but i think it will depend on what you want to take as a higher math class. some things dont rely on calculus at all. so if you are confident that u will not need calculus anymore just go with the c. if not you should retake if u think u can do better and want to know more about calculus.

and do u lift? hope to c more swole mathematical brothers. do us swollers proud. ive never had much education myself but i like math

Beware: u/porcupineouch is a malicious troll. Ignore him. by equivocal_pessimistin cheatatmathhomework

[–]porcupineouch -5 ポイント-4 ポイント

Thanks. I knew you were a cool guy. I'll try to write my posts so OPs know I'm not an expert. :E

Beware: u/porcupineouch is a malicious troll. Ignore him. by equivocal_pessimistin cheatatmathhomework

[–]porcupineouch -6 ポイント-5 ポイント

Good thing there isn't actually one - please acekool, you're cool - you know I'm not trolling - I'm just a nub.

Proving a function has at most one critical point by Mokeymokiein cheatatmathhomework

[–]porcupineouch 0 ポイント1 ポイント

Please read and don't downvote. I'm really trying to learn so if there are mistakes please don't ban me or say shit about me. It hurts.

Like AFairJudgement says f'' is always positive. We use Rolle's theorem instead of his method, since you want to know that method. So suppose there are two critical points, a and b where a<b. We know f is differentiable everywhere so critical points must occur when f' =0

Hence f'(a)=f'(b)=0

By Rolle's theorem, there exists a c in (a,b) s.t. f''(c)=0

But f''(x)> 0 for all x in R.

Therefore contradiction.

Q.E.D.

Beware: u/porcupineouch is a malicious troll. Ignore him. by jimmy_riggerin learnmath

[–]porcupineouch -15 ポイント-14 ポイント

Why are you being so mean to me? How the hell am I being a troll? I am only rude to people who keep hounding me and telling me to fuck off for no reason.

And where have I said that I'm a postgraduate? OK so I'm not exactly a 13 year old but my age is none of your business. I'm interested in math and haven't had any formal mathematical education. Sure, I make mistakes but so does everyone. Can't you just tell me what's wrong instead of banning me?

Please! Tears clothes and wails. Uses puppy dog eyes of Despair and Doom.

Help with 1 problem for homework by Padalanbgin cheatatmathhomework

[–]porcupineouch -1 ポイント0 ポイント

Your answer is probably better than mine. Unfortunately OP has already copied my less polished answer and will present that to class!

[Algebra 1] Total math newbie here. How does (x^2 - 1)/(x + 1) = -4 if x = -3? by DRUGSDRUGSMOREDRUGSin learnmath

[–]porcupineouch -1 ポイント0 ポイント

Not a troll. This guy is crazy. I'm just trying to learn some math and contribute to the discussion!

[Calculus] A handy mnemonic for remembering the trigonometric derivatives/integrals. by MalignedAnusin learnmath

[–]porcupineouch -1 ポイント0 ポイント

Okey dokey I accept your apology for that travesty. Oh also another nemo nick is Sex (antiderivative of ex ) with you makes your partner an ex (ex ). I'm sure this is true in your case since your anus is so well-used and it's handy for you to remember.

Haha it was a joke! I'm sure you haven't had sex hehe

[University Differential Equations] Solving a differential equation with initial conditions. by -Big_Test_Icicles-in learnmath

[–]porcupineouch -2 ポイント-1 ポイント

Yeah me neither.

[Trig Identity Questions] Help with a tricky question by ArrogantScholarin cheatatmathhomework

[–]porcupineouch -3 ポイント-2 ポイント

What is wrong with you? Do you need me to help you figure it out?

[Trig Identity Questions] Help with a tricky question by ArrogantScholarin cheatatmathhomework

[–]porcupineouch -1 ポイント0 ポイント

Oh then change some of the letters and it will work. I'm not giving you the full answer! You must work for it :3

[Algebra 1] Total math newbie here. How does (x^2 - 1)/(x + 1) = -4 if x = -3? by DRUGSDRUGSMOREDRUGSin learnmath

[–]porcupineouch -2 ポイント-1 ポイント

So are you going to help me or make wiseass remarks?

[Algebra 1] Total math newbie here. How does (x^2 - 1)/(x + 1) = -4 if x = -3? by DRUGSDRUGSMOREDRUGSin learnmath

[–]porcupineouch -3 ポイント-2 ポイント

A real number is an element of the unique Archimedean complete totally ordered field up to isomorphism. Thanks for helping!

What if the operations are done in an integral domain that is not a division ring?

[Trig Identity Questions] Help with a tricky question by ArrogantScholarin cheatatmathhomework

[–]porcupineouch -2 ポイント-1 ポイント

cos/(cos+tan) = 1/s(1/t+t)=1/(cos + s2/cos) = cos / cos2+s2 = cos

[Linear Algebra] simple question about the properties of determinate by qualiaqqin learnmath

[–]porcupineouch -5 ポイント-4 ポイント

omg u're such a troll

[Algebra 1] Total math newbie here. How does (x^2 - 1)/(x + 1) = -4 if x = -3? by DRUGSDRUGSMOREDRUGSin learnmath

[–]porcupineouch -3 ポイント-2 ポイント

You can't just divide by (x+1)! We don't know what x+1 is. What if it's not a real number?

[Linear Algebra] simple question about the properties of determinate by qualiaqqin learnmath

[–]porcupineouch -3 ポイント-2 ポイント

Are you seriously calling us monkeys?

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