What is your favorite Manifold and why?
Any additional structures on it?

(Moreover, a question thats bugging me, for the knowing people: What can you know about a Riemannian manifold, with only local information, and what not. It's kinda strange/mysterious. And also, are all the invariances of the metric spacial transformations...you know, like SO(3)?)

http://www.scribd.com/doc/6052271/Septal-stimulation-for-the-initiation-of-heterosexual-behavior-in-
a-homosexual-male
>this time, B-19 viewed a 15-min 8 ram. "stag" film featuring sexual intercourse and related activities between a male and female. There was continuous EEG recording of the patient, as well as observation through a two-way mirror.
>The next afternoon he agreed without reluctance to re-view the stag film and during its showing became sexually aroused, had an erection, and masturbated to orgasm.
>At this time, the patient was maintaining an active interest in females, culminating in an expressed desire to attempt heterosexual activity in the near future. Therefore, arrangements were made for a 21-year-oldprostitute to spend 2 hours with him in a laboratory specially prepared to afford complete privacy.
>After about 20 min of such interaction she begun to mount him, and though he was somewhat reticent he did achieve penetration.

What ethics board approved this experiment?

halp:

( cos(?)+ sin(?) ) / ( cos(?) - sin(?) ) = tan (45° + ?)
&
( sin(?) - 2*sin(2?) + sin(3?) ) / ( cos(?) - 2*cos(2?) + cos(3?) ) = tan(2?)

where should i start and what should i do?

this is fun /sci/

http://en.wikipedia.org/wiki/Conway's_Game_of_Life

>Roommate complains for hours to friends on phone about having to do make-up Chemistry Lab
>Tells me the reason he missed the lab was because he was "Really hung over"
>Mfw

http://mises.org/daily/5216/Six-Fundamental-Errors-of-the-Current-Orthodoxy

U mad, Keynesfags?

Hey /sci/,
I'll have to write a thesis linking many subjects or making them revolve around one theme for the exam I'll take at the end of my school year.
Having the opportunity to choose whatever I like, I thought about cinema (a possible concept is "The worlds cinema can create"). I already have some good links (Art with Dalì's work, Philosophy with the Matrix and Italian with the Italian Neorealism).
I was wondering if I could get some scientific aspects in my work, so I came here in search of advice. I don't know if any of you have watched Synecdoche, New York (long story short, a drama writer wants to build a reproduction of New York inside a building, and again and again). I like the idea of using the matryoskya limit, or at least that concept. I guess it could be easily linked with physics, and the concept of "small".
Another resource could be the technology that's depicted in Science Fiction (I watched a lot of Star Trek when I was younger).
What's your opinion, /sci/?

Thanks in advance, and excuse me for my English!

tl;dr: info about the Matryoshka limit, compare Science Fiction to reality

If you are smart than try to help me out with these questions.

1. You believe that an adult animal you are examining is a vertebrate but concede that it may be an invertebrate chordate. Which of the following would ensure that you are indeed looking at a vertebrate?
Its notochord functions as an endoskeleton.
A. It is able to swim.
B. It lacks a notochord.
C. It has a dorsal hollow nerve cord.
D. It uses its pharyngeal gill slits for respiration
2. Which of the following adult animals might you find floating in the open ocean, suspension feeding using its pharyngeal gill slits?
A. an ascidian
B. a vertebrate
C. a lancelet
D. a salp
E. a sea squirt
3. Why do adult urochordates (tunicates) lack notochords, even though larval urochordates have them?
A. Larvae use notochords to aid in swimming; adults are sessile and thus no longer need notochords.
B. Larvae use notochords to organize their nervous systems; adults' nervous systems are fully developed and do not change.
C. Larvae use notochords to induce tissue differentiation; in adults, tissue is already differentiated.
D. Larvae use notochords to stiffen their bodies; in adults, the notochord is replaced by a column of bone.
4. The structure that develops into the vertebrate spinal cord is the _____.

Whats the dumbest thing that you have seen somebody do n the Lab? Disasters, explosions, dumb people tasting chemicals ,ect

ITT: DIY Vaporizer

pic related, it's tamagotchi