How to sketch graphs for functions of two variables. Chris Tisdell UNSW

[MrPEDOCTOR]

great video 

[lgndarymeth]

Math exam in 40 minutes!

[ashfaqul11]

hey, could you please tell me what text book you were using??? PLEASE, thank you

[SalvadorePapadello]

SOMEONE PLEASE HELP what the hell do i do for f(x,y) = e^(y - x^2)????

[0103tan]

@SalvadorePapadello

lol assignment 3 for calculus 2?

[SalvadorePapadello]

@0103tan ......maybe :)

[0103tan]

@SalvadorePapadello 

[hippiechickie18]

5:10 = jolly rancher

[pwete3]

nice vid! from scared bristol uni student doing a retake in calc 2 but feeling more at ease with all these vids!

[clbmidnightracer]

unsw student!!! great lect!

[vonlsh]

thankyou! from uwa

[nightcutcom]

@vonlsh LOL math2209 exam tommorow?

[vonlsh]

@nightcutcom LOL!! YEAHH HAHAHA

[sct911]

my left ear enjoyed this video

[MetallicAus]

very good, thanks

adelaide uni student

[maouie16]

very clear -usyd student

[crazyman12346]

nice really good but u did a mistake x+y=100

okk

[mingyishi]

Awesome lecturer. Thank you from University of Melbourne.

[UTAMatchBoxMan]

Very nice. Much appreciated :)

[gyg0312]

oh and i'm from UQ =D

[gyg0312]

thanks from korea

[ssgh11]

marry me

[Musiclo0ovee]

Thanks

[yarie18]

Thanks from Isabela, Puerto Rico. This helped understand better the functions =)

[XN1ghtwalk3rX]

thanks from Canada Ontario

[couscousable]

Thanks from Canada, ON

[bustachaina]

i like how you include the "motivate" part to know why we're learning it, that's a -hugely- important part for me! thank you for this help

[orphangorillas]

Thanks from Hanover, NH, USA!

[eNikoltsios]

Thanks from Glasgow! 

[masterchief377]

Thanks from Georgia, USA

[samedgecombe]

The sound is pretty poor , but thanks for putting up your lecture!

[sekwah09]

z=y^2-x^2 in 3-space looks suspiciously like a pringle; those potato hyperbolic paraboloids sure make a tasty snack ,LOL.

[rumidom]

severable

[zskarimi]

that was awesome, thanks :) after patrick you are my second hero in math ;)

[Grobannela]

@zskarimi I lovee Patrick..=)

What about Salman Khan? He's awesome too...

[sekwah09]

@zskarimi

What about Donny Lee?

LOL

[PhilM3t4l]

The guy was pretty good but I was hoping for some complicated examples about sketching contours i.e. when the contours are hyperbolas around a saddle point. I have an exam tomorrow and the hyperbolas are driving me mad.

[200266448]

great video....Concepts were explained to the detail in a precise manner

[ffddssaavvccxxzz]

mashaallah

many thanks sir

i respects math teachers.

[peracutus]

Thank you Sir! : )

[sangboi]

thankyou for uploading these!

[marianopf]

Brilliant!!!

[DrChrisTisdell]

Thanks Marian

C

[Brianaust138]

its MATH1120's topic as well

[DrChrisTisdell]

Hi Brian - are you at Newcastle Uni? If so, then how are things there? I lived in Newcastle until I was 14 (my Dad was a Econ Prof there too)

:-) CT

[Brianaust138]

That's pretty good guess, Chris. Yeah im at Newcastle uni. Everything goimg good. So where r u now? And is ur dad a maths lecturer at Newcastle uni?

[farrow28]

i don't get computers at all, or youTube comments MATH1231

[farrow28]

i think the videos are pretty good, i like it when you apply the motivation behind problems, rather than just telling us what to do...

Additionally, i would like a text book, so 'MATH131' all the way.... hmmm...

thanks for the videos

[DrChrisTisdell]

Hi Farrow - I don't understand computers either!

I agree with your comment: it's important to know the *why* and not just the *how*

Good luck!

C

[j3tpil0t]

Very well done.

A few pauses here and there, and you sound a little more interesting in lectures (more enthusiastic), but as far as youtube goes, (and the purpose of the video), you've hit the nail on the head.

Keep it up.

-the guy who laughs at south park references, MATH1231

[DrChrisTisdell]

Thanks for the feedback j3tpil0t. Good to hear that you're a South Park fan, too.

C

[dean2105]

These videos are a great supplement to the lectures. They are really helping in revising the material, keep them coming! One complaint, the paragraphs that you've taken out of the textbook are a bit hard to read on the screen. Oh, btw I'm doing MATHS1231 this semester.

[DrChrisTisdell]

You're right, Dean - the smaller font from those pics makes them a little more difficult to see. If I select "HQ" and full-screen view on my computer, then the font seems to be legible, but I understand that if you're at home then HQ can chew the download quota!

See you in class!

Chris

[1111Einstein]

"The mathematics is not there till we put it there." (Sir Arthur Eddington, The Philosophy of Physical Science)

i saw the meaning of that quote in your lectures and i really enjoy your lectures because ,they are presented in a simple way to explain the complicate things.

[DrChrisTisdell]

Thanks Einstein (great name, BTW). I have not heard of Eddington, but your quote has motivated me to look him up. See you in class!

[DrChrisTisdell]

Thanks Peter!

BTW: your channel has some great DJ stuff. If you want a bit of a suprise then Google "DJ Chris Tisdell".......:-)

[PtrProjekt]

thanks for this! so much easier to understand than the 1241 lecture :D

[showboylyw]

how come the sound only come from one earphone??? that is...ummmm!!!

alrite, never mind.

you lecture is more attractive.

^_^

[DrChrisTisdell]

Hi Showboy. There are two mics involved: onie for each channel. One mic records what I say and the other is a backup mic just in case the first mic fails.

Thanks for posting!

BTW: Great singing on your channel!

[showboylyw]

lol~

my singing is bad..

how about u?

could you plz sing a song on the lecture???

: P

[showboylyw]

by the way, i'm doing 1231: )

[syosukya]

your real lectures are more interesting

[DrChrisTisdell]

I agree with you, syosukya.

A video can never replace the atmosphere of a live lecture, but video can do other good things, like be a resource that can be used over an over again as a revision tool, for example.

[chorolpa]

that's great chris, i work sometime i miss my lecture its great way to catch up i wish there was one for algebra as well....

[DrChrisTisdell]

Thanks for posting chorolpa!

I'm sure that if there is enough demand then more subjects will have these kinds of videos. It just takes time, effort and a clear need, which can be demonstrated, for example, via CATEI comments.

Best of luck

Chris

[paperfreeck]

Very very nice ...

[DrChrisTisdell]

"No worries", as us Aussies say!