Mathematics - 2014-11-26 (page 2 of 4)

Kaj Hansen

9:00 AM

@beginner, so $W_2$ is going to be scalar multiples of the vector $(2, 0)$.

beginner

but how is $(2,0)$ a vector?

Jasper Loy

@KajHansen Do you mind sharing email with me?

beginner

cause $y=x$ is $(x,x)$ and $y=2x$ is $(x,2x)$ but he has $y=0$ and $x=2x$

Kaj Hansen

@JasperLoy, it's in my profile's "About me" haha

Ohhh, your confusion is stemming from the fact that you're denoting two different things by $x$

He should probably use $c$ instead, where $c$ is an arbitrary scalar.

Jasper Loy

@KajHansen OK, but that address will be gone when you graduate. Do you mind sharing a personal email you will keep for life?

beginner

9:02 AM

oh ok, so it doesnt need to be $x$ ok

Jasper Loy

@KajHansen OK, done. I will email you in a minute.

Kaj Hansen

Yes @beginner. The $x$ here has nothing to do with "the $x$ coordinate".

beginner

okay thank you again :-)

UserX

@Integrator the alignment fucks up this way...

Committing to a challenge

How many data entries shall I need to get sufficient statistical power for my coffee vs study time ANOVA? ;)

On $5$ days I have a P-value of $.618$ so that is worthless xD.

Jasper Loy

9:07 AM

@KajHansen Sent you an email!

Committing to a challenge

What statistics should I record for my challenge?

Kaj Hansen

Got it!

Committing to a challenge

I have the time spent on each textbook each day, the number of pages complete each text, the number of coffees, time spent travelling, hours of sleep previous night and number of distinct people I have had an extended interaction with

What else would be interesting?

Nick

@Committingtoachallenge Try walking on one side of a mobius strip.

Kaj Hansen

Average amount of sleep each night? @Committingtoachallenge

Committing to a challenge

9:11 AM

I mean for my daily data collection @kaj, I will definitely put that up and do analysis of variance against time spent studying because that is pretty interesting

Kaj Hansen

Oh no, I'm asking what's your average sleep

Sorry for ambiguity

Nick

@Committingtoachallenge I'm sorry. I don't know your background story.

Committing to a challenge

Oh sorry, Well for the five days I have (roughly collected) 7,7,9,7,8

Kaj Hansen

Nice! Are you on break right now?

Committing to a challenge

That is the time since I lay down to sleep though, but since Uni is over I have been aiming for good sleep hygiene

Yeah :)

Previously I was on about $4$ hours all semester xD

Kaj Hansen

9:13 AM

That's me. I go to bed around 4 and wake up around 7:50 each day.

Committing to a challenge

I was doing midnight to 4am here xD

Because I live a bit over two hours from uni :\

Kaj Hansen

Do you commute? :O

Committing to a challenge

Yep, two buses and it costs $10 a day

One way*...

Nick

@Committingtoachallenge: Maybe try googling the yearofproductivity project. You should totallly do what he did.

Kaj Hansen

Holy crap. By the time I get outa bed it's 8:30. I then shower and shave and still make it to my 9:05 class on time :P

Committing to a challenge

9:16 AM

@KajHansen I wish I lived on campus haha, would be awesome to just go in whenever

Jasper Loy

36 days to the new year.

Kaj Hansen

More importantly, like 14 days to finals.

Committing to a challenge

Any ideas for statistics to collect Kaj, my girlfriend couldn't think of anything, nor could I(she is the creative one xD)

Jasper Loy

Next year, I will try to study my 12 math books and solve my mental problems completely.

Kaj Hansen

Caloric intake?

Committing to a challenge

9:17 AM

@KajHansen Oh that could be good, and it would be helpful for exercise as well

Maybe minutes exercised following on from that

Or maybe just total weight moved hmm

Kaj Hansen

I only thought of that since I've been getting in shape myself.

Committing to a challenge

@KajHansen I had been working out for a long time, but I stopped for finals and now I am fatish for the first time of my life

@KajHansen Thanks Kaj, that is great

Kaj Hansen

I'm personally trying to be less thin. I started hitting the weights and eating a ton at the beginning of this semester. It's paid off a lot so far.

Committing to a challenge

@KajHansen I weighed 57kg at 6ft, half a year after highschool was done, and now I weigh 82kg same height haha. I remember I started with benching 20kg

Jasper Loy

I will try to study from morning to night every day next year. It will be very tough.

Committing to a challenge

9:20 AM

I was the excessively thin kid xD

@JasperLoy I don't think that is possible to be honest, or not effectively

Kaj Hansen

Let's see. I have to convert into kg...

Committing to a challenge

125lb to 180lb

started with benching 44lb :P

Kaj Hansen

I was 6'3 and 61.5 kg at the beginning of the semester.

Jasper Loy

@Committingtoachallenge Yeah, we'll see. Paul Erdos spent 16 hours doing math every day.

@KajHansen How much is that in metres?

Kaj Hansen

Now I'm still 6'3, but 77 kg.

Committing to a challenge

9:21 AM

@KajHansen that is probably equivalent taking height into account, and everyone always called me the skinny kid xD

@KajHansen Wow that is a heap of gain, do you bench?

Kaj Hansen

Yeah @Committingtoachallenge. My 3-rep max on bench went from 100ish pounds to 185. Tired of converting to kgs, lol

Committing to a challenge

My one rep is 250lb, well before my finals :S

Sawarnik

Hi all.

Kaj Hansen

@JasperLoy, 6'3 is like...191 cm

Committing to a challenge

@KajHansen Do you do Madcows or grayskull or SL5x5 or anything like that?

@Sawarnik Hey Saw :)

Sawarnik

9:24 AM

I am around 48kg. And 5'6.

Jasper Loy

@KajHansen Wow, you are very tall and handsome too, lol.

Kaj Hansen

My one rep is probably around 200 on bench

Committing to a challenge

@JasperLoy xD

@KajHansen That is really good for starting to hit the weights this semester!

Sawarnik

@JasperLoy Exactly.

Committing to a challenge

@KajHansen My gains were nowhere near that fast

Kaj Hansen

9:25 AM

@Committingtoachallenge, my roommate is into powerlifting. We got into Smolov Jr. for chest at the beginning.

Jasper Loy

@Twink I am ten per cent gay.

Committing to a challenge

@KajHansen My squat is my baby 350lb for 5 reps

Kaj Hansen

I've been going to the gym basically every day, trying to eat a ton, protein shakes, etc.

Sawarnik

@r9m Thanks :D

Committing to a challenge

@KajHansen Yeah I ran out of money for protein shakes haha

Jasper Loy

9:25 AM

@Twink No, I am straight, but straight people can be a little gay too.

r9m

@Integrator if that's a rod .. spoil me ! =P

Kaj Hansen

Oh god, that's impressive @Committingtoachallenge

Committing to a challenge

@KajHansen I think you motivated me to workout in an hour

r9m

@Sawarnik ?! why ?

Twink

@JasperLoy Yes, according to the Kinsey scale en.wikipedia.org/wiki/Kinsey_scale

Jasper Loy

9:26 AM

@KajHansen It's not wise to work out every day. Your muscles need time to repair.

Sawarnik

@r9m Quora :)

Committing to a challenge

@KajHansen That is my best lift by far, which is weird because my grip gives out on deadlift at 280lb

Nick

@JasperLoy Gay means happy :D

r9m

@Sawarnik oh ! I liked that answer ! so genuine upvote ! :-) (y)

Committing to a challenge

So I am a little weight lifting imbalanced

Sawarnik

9:27 AM

:D

beginner

oh wow so many chatters here now hehe

Kaj Hansen

I'm bummed right now though because there aren't any gyms close by here in my hometown. I'm stuck doing bodyweight stuff for a week.

@JasperLoy, I'm doing completely different muscle groups from day to day though.

Nick

@Committingtoachallenge Never start off with weights if your cardio routine isn't in full fledge.

Jasper Loy

@KajHansen Wow, you must be as hot as Matt Damon, lol.

Committing to a challenge

@KajHansen I bought all my gym equipment since I live so far out, so that is one plus haha

Twink

9:28 AM

It's fun that nobody's talking about math

Committing to a challenge

@Nick My cardio was once good

r9m

@Sawarnik my exams were over today !! :-) got something for me ? ;) (I mean geometry and inc)

Kaj Hansen

You're probably correct nevertheless. At any rate, I go every day because the endorphins put my depression at bay long enough for me to get my work done at night.

Committing to a challenge

@Nick Then I gained over $20$ kg and my knees died

Nick

@JasperLoy exactly who I confused his mini profile pic to be.

Twink

9:28 AM

I wish it was like that on the day time of the occident

Sawarnik

@r9m :D Yup.

Committing to a challenge

@KajHansen Ahhh yeah, that and sunlight does make me feel a heap better

Nick

@Committingtoachallenge Hopefully that's an exaggeration. Dude, are you in a wheelchair?

r9m

@Sawarnik okay ! make it rain ! :P

Jasper Loy

I dropped a lot of hair due to stress. I hope it grows back soon.

Committing to a challenge

9:29 AM

@Nick No haha, no real injury, they just hurt when I jog now

Sawarnik

Let me think of the right question!

Nick

@JasperLoy Me too. What have you been trying.

Committing to a challenge

So I don't jog anymore xD

Jasper Loy

@Nick Trying? Nothing.

Committing to a challenge

Hence I am gaining fat for the first time in my life

Kaj Hansen

9:30 AM

My cardio is trying not to be late for my first morning class :P

Twink

@JasperLoy you'll become bald

Nick

@JasperLoy no oils, shampoos or yoga? Well, sure time heals things but not doing anything changes nothing.

Committing to a challenge

@KajHansen I sit on a bus hahaha

Jasper Loy

@Twink Oh well, no girl wants me anyway, so it's fine, lol.

Kaj Hansen

LOL

Jasper Loy

9:31 AM

@Nick I am more concerned about my mental illness now.

Committing to a challenge

@KajHansen and eat too much food apparently

Twink

@JasperLoy you should hurry up to get a girlfriend before you become bald

Nick

@JasperLoy Actually some women find bald men very attractive..

Jasper Loy

@Nick Are they bald too? LOL.

Committing to a challenge

@KajHansen My girlfriend says I haven't gained any weight, so I feel like the chick complaining about my weight gain LOL

Kaj Hansen

9:31 AM

LOL @Committingtoachallenge

Sawarnik

@r9m Hmm .. I cant think of a good one :O .. but will get one later in the day :P

Nick

@JasperLoy possibly...

Sawarnik

Goes to eat...

r9m

@Nick ya !! they like shiny stuff maybe :P

Twink

@Nick why are you so upset?

r9m

9:32 AM

@Sawarnik okay ! :-)

Committing to a challenge

Well I will go and have my Creatine and hit my texts now, thanks for the chat guys hahaha, I feel a heap better now

Nick

@Twink hahahahaha, bacation lady!

Kaj Hansen

See you around @Committingtoachallenge

Twink

Committing to a challenge

Cya @Nick @Jasper @Kaj @Saw

Nick

9:32 AM

@Committingtoachallenge Go Go Go Go Go! You the man!

Committing to a challenge

I didn't really talk to you but cya @twink @r9m

Nick

@r9m Women's wishlist: Gold, diamonds... scalp?

Kaj Hansen

hahaha

r9m

@Nick ya ! there are examples all around history !

Twink

@JasperLoy so, you don't have a girlfriend because girls don't like you?

is that the reason?

Jasper Loy

9:34 AM

@Twink I think the major reason is that all these years, I never really looked hard, because I am trying to get well.

Twink

I thought you didn't have a girlfriend because you were focused on your mental illness

Ok

@JasperLoy did you see a doctor?

@JasperLoy do you take any prescribed medication, sir?

Jasper Loy

@Twink I have, for a year already. But I am going to stop now, and just sort out thoughts myself.

Nick

@Twink Yes, he asked @Jasper to be his companion as they traveled through time and space.

Jasper Loy

@Twink Yes, I have, for a year, but am stopping now.

Nick

@JasperLoy because your doctor is a faith healer and he doesn't have the answers?

Jasper Loy

9:37 AM

@Nick Because meds don't really work, and whatever psychotherapy there is I can do on my own.

Twink

@JasperLoy maybe you need a better doctor

Nick

@Twink yeah, one with a bigger screwdriver!

Jasper Loy

@Twink Yes, I need myself.

Kaj Hansen

I've heard lots of stories about psychotropic drugs doing more harm than good. I've stayed away from them myself.

Jasper Loy

@KajHansen What is your condition?

Nick

9:38 AM

@KajHansen What have you heard of n00tropics?

Kaj Hansen

@Nick, a number of things, why?

Nick

@KajHansen nuthing.... just making conversation...that's all...

r9m

@Nick I used one a couple of times !

Twink

does marijuana count?

Kaj Hansen

@JasperLoy, probably nowhere near as bad as yours. I have depression that comes and goes in waves, say from week to week. I'm almost always unhappy to some degree, and it sucks.

Nick

9:41 AM

@r9m I drink green tea before doing something difficult. 90% of the time, it's just the placebo effect helping me.

@Twink that's a narcotic, not a nootropic.

Jasper Loy

@KajHansen I see. Maybe you can consider seeing a psychotherapist to work out your issues.

Twink

@KajHansen what's the cause of your depression?

@JasperLoy you just said psychotherapists don't work

Kaj Hansen

Yeah, I've considered it. The endorphins from working out have been helpful. They wear off by the morning so I have to keep going to the gym, lol.

Nick

@KajHansen I've been there. The only cure is to ignore it.

Jasper Loy

@Twink It works for the people who feel it works.

Nick

9:42 AM

@KajHansen music and motivational films help too.

Twink

@Nick ignore what?

Jasper Loy

@KajHansen Try running too.

Nick

@JasperLoy Placebo!

Jasper Loy

@Nick In this case, not placebo. Some people find it genuinely helpful.

Kaj Hansen

@Twink, not sure. Probably a big factor in it is working alongside brilliant people and feeling extremely inadequate at the same time. I mean, my grades aren't very good, and I pray I can get into grad school.

However, it started before I started studying math, so I don't know the root cause.

Nick

9:44 AM

@Twink The depression. It's just a lack of serotonin. If you stay in one place too long, you become an empty cup (depressed)

Twink

@KajHansen did you see a doctor?

@Nick did you see a doctor?

Jasper Loy

@KajHansen I already went mad before starting undergrad, so I didn't do very well. Also, I did not study in a great place. But at least now I know what I have been missing out and need to study on my own.

Nick

@Twink Yes, many seasons of Doctor Who!

Twink

@Nick what is the cause of your depression?

Kaj Hansen

@Twink, I have in the past. Not recently.

Jasper Loy

9:45 AM

@Nick I think the serotonin theory is bullshit. And yes, I have done a lot of reading on it.

Twink

sometimes they say they wanna kill me and things like that

so what I do is just hang up because I don't know what they're doing

r9m

@Nick teas are awesome mood soothers ! .. I usually stay calm .. but nootropics seem to have an adverse effect on my patience .. I succumb to irritation before I realize it !

Nick

@Twink $\sqrt{\text{depression}} = \text{unhappiness} = f(\text{life})$

Twink

I've also been depressed

for a reason I don't wanna talk about...

Jasper Loy

@Twink Are you still looking for a rich bf?

Twink

9:47 AM

lol

Thanks @JasperLoy, that was the reason I didn't wanna talk about

Kaj Hansen

Depression is fairly widespread amongst the undergrads in the math department at my university. I think it's rather interesting.

Nick

@JasperLoy Really? Ok, but you still have to admit that it is a chemical imbalance. No denying that.

Jasper Loy

@Twink Money is not everything, you know. You should look for a bf with a good heart!

@Nick I am not sure it has anything to do with chemicals at all...

Twink

@JasperLoy I was not talking about the money, I was talking about the bf

for those who don't understand, bf=best friend

Jasper Loy

@Twink OK. I hope you find a good bf then, lol. I am not gay, so I can't be your bf, lol.

Twink

9:49 AM

I want a best friend

Jasper Loy

@Twink Oh, OK.

Twink

@JasperLoy you can't be my best friend because you're not gay?

r9m

@Nick It is not the chemical imbalance itself but the brain's reaction to the imbalance observed as depression !

Twink

that doesn't make sense

Jasper Loy

@Twink I interpreted bf wrongly, lol.

@Twink Can't your boyfriend also be your best friend?

Twink

9:51 AM

@JasperLoy do you need to say so loud that I'm gay?

Jasper Loy

@Twink I am sorry.

Twink

@JasperLoy just kidding, it's ok :p

Jasper Loy

@Twink Don't you have any close friends at all?

Twink

yes, why?

Jasper Loy

So why can't you find a 'best friend'?

Twink

9:52 AM

I have 5 friends

I was kidding about that too, bf=boyfriend

Jasper Loy

OMG, I am confused!

Twink

I'm as weird as you are, I've never had a partner!

Nick

@r9m Yes, but there are even more layers to describing it. I was speaking fundementalistically.

Jasper Loy

@Twink Join a dating site.

Twink

@JasperLoy you too, lol

Jasper Loy

9:54 AM

@Twink After I recover, lol.

Twink

me too, from my depression

Jasper Loy

@Twink So many toos, lol.

So many lols, lol.

I am going to shower.

Twink

I've had a depression for like 13 years

and never seen a doctor

r9m

@Nick genie?!

Twink

I'm the weirdest here

Nick

9:57 AM

Cuss this, everyone's throwing out a word "depression". You're not depressed until you're curled up in fetal position weeping about how you can't get up! Thats depression. But we have reasons to go on. Move on. Battle with the world.

Twink

@Nick there are levels of depression

I always have terrible insomnia

it's 3:58 am here and I haven't been able to sleep

:(

Nick

@Twink In that case, every freaking living creature is depressed. We deal with it. Some turn to religion, others to themselves... most just ignore it and it goes away.

@Twink Got milk?

@Twink i didn't sleep last night either. I typed out 569 lines of code... that actually ended up working perfectly... So, yay!

Twink

I drank milk with my cereal 6 hours ago

@Nick listen to this youtube.com/watch?v=zlNBEniHXd0

Nick

@Twink I mean right now. Get some warm milk. Sleep in for a day or two if required and go do something really fun and stimulating... like math... or if that doesn't work, try out an Xbox game.

Twink

I don't have milk, I drank it

and I don't have games

I entertain myself watching prank call videos on youtube

Committing to a challenge

10:07 AM

Chatjax bookmarklet works on one website blog but not the other...

Nick

@Twink Go eat some more morons ma'am, it'll make you more intelligent.

Committing to a challenge

@Nick Can you try chatjax on two websites real quick and tell me if it works?

Nick

@Twink The quality of your entertainment is not at all up to the mark. Go search some Fry and Laurie, Just for Laughs, Mr. Bean, CinemaSins ... anything but silly prank calls.

@Committingtoachallenge kay. It works on youtube comments, the deviant art chatrooms and in all rooms of stackexchange.

Twink

@Nick If you live until you're 150, you're not gonna be as smart as I am in one finger

Nick

@Twink i remember when she actually said that. I'm amazed how much I remember this woman from my childhood.

@Committingtoachallenge Yes, one has math. The other doesn't. lol

Committing to a challenge

10:13 AM

I don't get it, they are configured identically...

@Nick You saw the sets displaying in math mode? But the integral and alpha beta didn't render on the other?

r9m

:18785879 for your blog ,, you can try reloading the page with http:// (chatjax does not work on https://) .. :-)

Twink

hi @Committingtoachallenge

Committing to a challenge

@r9m Ohhh that would be it, but it doesn't let me run it non https for some reason

r9m

@Committingtoachallenge hmm .. I'm not sure but I think one has to fiddle with the browsers security options .. (its safe to check on google first) .. (I had the same problem for my blog too .. )

Committing to a challenge

@Twink Hey twink

@r9m Maybe it is in the websites admin settings, I tried it on three browsers and all https

r9m

10:19 AM

(scratches head) I'm not sure ! @Committing .. one fine morning it started working nicely for me once I reset my browser settings to default !

Twink

@Nick do you know el chavo del 8?

r9m

@Committingtoachallenge if you are using chrome .. there will be a gray shield appearing in the right end of the address bar (when you click on the render mathjax bookmark) .. click on that and load the unsafe script ..

Twink

Everyone watch Chavo del 8 here, it has subtitles youtube.com/watch?v=1MeXJHoNO7Y

Committing to a challenge

@r9m It seems that everyone is getting https forcibly though. I think it has to be settings

r9m

@Committingtoachallenge hmm .. possibly ..

bbl ... I wanna AOE !! :D

Nick

10:29 AM

:18785877 No, something about your theme isn't allowing the script to work.

@Twink Mexican comedy.. I've heard of it.

Twink

@Nick watch it, it has subtitles

Committing to a challenge

@Nick Yeah I was thinking that :\, maybe the theme comes with HTTPS

Twink

it's better than judge Judy

Nick

@Committingtoachallenge Hehe, well, go to view source on your page, run chatjax, the $1, 2 ,\dots \alpha$ will display :D

Committing to a challenge

@Nick :'( I like that theme :''((

Nick

10:31 AM

So, it's definitely something with the javascript on your theme.

@Committingtoachallenge It has "disallow external scripts" somewhere in it. i can't locate it but I'm very sure it's difficult, if not impossible, to remove.

Committing to a challenge

@Nick I will change the theme :\

@Nick Thank you for your analysis :)

Nick

@Committingtoachallenge Try using the script with a few different themes. If it works on any one, then I'm right.

If it doesn't, then that means your sample space was too limited.

lol

Committing to a challenge

@Nick I think you are, since I just selected it, and the other I did the same stuff on the working website

Nick

@Committingtoachallenge If you were willing to invest on the .org .. then I think you wouldn't have to face this problem of not getting good themes.

Committing to a challenge

@Nick I don't want to invest anything, or else I won't feel like it is just for fun(I am too poor haha)

@Nick At the moment I should say

@DanielFischer Do you know how to take wordpress off of HTTPS to just HTTP?(I only ask because you have such high rep on stack overflow, but it is a longshot I guess)

Daniel Fischer

10:58 AM

@Committingtoachallenge No idea, sorry.

Committing to a challenge

@DanielFischer Apparently it is impossible says support just now actually, so I guess that is that. Thanks anyway

Nick

Well, have fun.

i.imgur.com/Qilabob.mp4

Bobson

11:54 AM

@Nick Thanks!

Mats Granvik

12:41 PM

I am dreaming of making power series reversion into an operation on the function that would also reverse the function.

Involves convolution.

Unfortunately one of the steps is term wise multiplication which can not be made into convolution.

Maybe starting with the geometric series would shed any light.

Chris's sis

Greetings

@Hippalectryon see $(5)$ here mathworld.wolfram.com/DoubleFactorial.html. You used a wrong definition of double factiorial. The one you used is only true for positive odd integers.

Transcript for

$Mathematics$ Mathematics