# Cambridge Chat (previously New Cambridge Students Entry 2004)

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crana9
by the way.. anyone... Is there anywhere in cambridge that sells sewing type stuff? I need a hook and eye and some black thread in an experiment to try and make my gown wearable...Like any big dept,. stores should sell that kind of thing, but i dont recall seeing any?!

there's a really good sewing shop on king street if the one in hobson street doesn't have any - it's a sewing machine shop but they sell all sorts of other sewing stuff too.
Willa
devilchild....if you havent managed J9 by now, here's the answer I just worked out:

a rotation by angle t is multiplication by a complex number: p = cos t + isin t (since arg(p) = t)....therefore

z1 rotated = z1p
z2 rotated = z2p

taking these new values for z1 and z2, then (New z1)(New z2)* = (z1p)(z2p)* = z1z2*pp*

but |pp*| = 1 (obviously) and arg(pp*) = 0, therefore z1z2*pp* = z1z2*, so is invariant!

You rotate them through the same angle? F the guy who set the questions. I thought he meant rotate them through different angles. What a Bastard!!
maybe you're right shaui, but that's the way i interpretted the question! it cant be rotating by different angles actually, cos if you decided to not rotate one, but rotate the other, then you definitely WONT get an invariant, so it must be the same angle
has anyone got helen's mob number by chance...PM it to me if you have, i need to sort out tomorrow with her!
I'm here, I'm here, I'm here! Get in touch NOW!
how how how!
Willa
how how how!

Willa
tick 5 was a piece of piss...will only take you 10 mins

Oh, I've just discovered a new unspeakable well of loathing.
Immortal Wombat
Oh, I've just discovered a new unspeakable well of loathing.

Tick 5 won't take you 10 minutes, Tick 5* will.
Tick 5 has already taken me 2 hours. I'm sure it should be this, but ML disagrees.

fun nfold(f,0) = f
| nfold(f,n) = f nfold(f,n-1);
Just had a lecture on how to become immortal! Mwahaha (evil laugh!) but this website is more distracting than I feared, they mentioned stuff on apoptosis and all I was thinking was what you medically/sciencey people were discussing about it a while back!

Still ill my mum was even suggesting she come and visit, not that I can actually see that making any difference to my health
Ben,

just had an email from dr bussey, he says he;s on the case ,our person pulled out at the last min and they cant find anyone else" - but theyre trying!
Fair enough then. Thanks for letting me know.
Katie J
Just had a lecture on how to become immortal! Mwahaha (evil laugh!) but this website is more distracting than I feared, they mentioned stuff on apoptosis and all I was thinking was what you medically/sciencey people were discussing about it a while back!

Still ill my mum was even suggesting she come and visit, not that I can actually see that making any difference to my health

i have some vitamin C stuff and paracetamol if you need it...
ben, what's the prob....tick 5 IS easy.......you're just making a mistake somwhere, dont overthink it!
Uuuuuurgh....*dies*

Just did our first full racing piece. Went pretty well, bar a couple of crabs (not mine) but oh god I'm crippled now. Looking forward to our night out tonight though! Apparently we're also going out with the Blues Lacrosse team on Thursday, which should be exciting
i'm hoping all my guys turn up, some havent replied to emails, but i think all of them are gonna show!
i dunno if there is gonna be complications cos of the ecsu elections going on (they use our bar to announce stuff)....shouldnt be a prob though
Immortal Wombat
Tick 5 has already taken me 2 hours. I'm sure it should be this, but ML disagrees.

fun nfold(f,0) = f
| nfold(f,n) = f nfold(f,n-1);

Is it because of something called circularity? Yeah... Curse that feature of ML. Bastard!
Discrete Maths is getting on my nerves!!
no no no

you want:

fun nfold(f, 0) x = x
| nfold(f, n) = f(nfold(f, n-1) x)

curry it damn it!