@ robjohn I got a model of non hyp geometry made in 3d printing, crazy abt it

well, if I move to CA, I'll come bug you, @robjohn :)

@ Ted aah yeah, now i remember, he was also the chief of MRSI and a couple of months back he was in CA for a talk

no, I don't think he was ever in charge of MSRI ...

@ Ted MRSI iirc is mathematical res inst of india

@TedShifrin Do mathematicians ever retire? I don't think so ... :-)

@ Ted or something like like that, after Dr Seshadri of Madras institute may be

ohhh, sorry, sorry, I transposed the letters

some of us do, @Chris'ssis

my adviser really never did ... he was doing math until the day he died.

so was Einstein

@TedShifrin nice

I think maths fights against turning senile :))

well, I doubt I'll be that persistent

I heard Euler did maths till his last.. and died while playing with grand kids at some 90+

Hi folks can you give me some tips..

People who stopped doing mathematics had "died"

My answers are hardly are uncommented and /or answered ; what may i be missing?

You want answers to your answers?

@ice boy.. i like that

The last diff geo question I answered last night still hasn't been remarked upon by the OP.

@Narasimham Erdos

@Ted yes it should not be cry in the wilderness

@TedShifrin The 5 last answers I have given haven't been accepted :/, set aside the really last one

well, @Hippa, I never trust anything you tell me.

@IceBoy what about paul erdos?

@TedShifrin You don't paradox :D

@Narasimham he said it

@ iceboy It keeps your neurons well connected... here there is another trick

@ iceboy Music, praise the lord in songs that are popular

OK, time for me to go cook dinner ...

@ Ted OK sir see you soon again in chat..bye 4 now

bubye

@ Robjohn I like to do surfaces R^3 R^2 embeddings

@Narasimham no space after "@"

@TedShifrin You should shave your moustache.

I imagine it would be something like this

@ Ted if u did nt leave .. The equation for gauss curvature in cart coords is simple ( r t -s^2)/(1+p^2 +q^2)^2 but have not seen one in polar coords so far..

@Narasimham the message will not be sent

more coffee needed

too much coffee is no good for you

@IceBoy thnx, i remove the space now

np

@robjohn that limit is one of the most surprising limits. I mean one doesn't expect that.

@Chris'ssis the appearance of $\gamma$?

@robjohn Yeap

@robjohn At the same time I feel there must be some easy way around, but I don't manage to see it yet.

Tomorrow I'll make some drawings.

The night is long and the work is hard.

anybody know what "functionally defined" means in the context of specifying subgroups of groups?

the notion is vauge