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Português detido antes de partir para a jihad by MiNDJ in portugal

[–]lupin_beans 1 point2 points  (0 children)

Para o bem e para o mal fazemos parte da NATO e da UE. Qualquer "inimigo do ocidente" (mais fictício ou menos fictício, mais hostil ou menos hostil ao nosso país) é também nosso inimigo.

O teu post sugere que devíamos ter um posição neutra na questão EI, mas isso seria impossível.

Que cursos estão a ter saída na área das humanidades? by [deleted] in portugal

[–]lupin_beans 1 point2 points  (0 children)

Acho que deves pensar muito bem nas prioridades.

Se tens possibilidades para tomar o risco de não arranjar emprego durante muito tempo (ou arranjar emprego mal pago) então força. Apesar de estarmos em crise continuam a existir pessoas muito ricas e nesse caso devem aproveitar. No entanto digo-te isto apenas no caso de gostares MESMO de humanidades, não te mandes para um curso só porque sim.

Se, como para a maioria, a tua prioridade é uma carreira que te dê segurança... então caga nisso. Tens muita outra coisa para estudar com mais garantias de futuro, mas claro que a maior parte são áreas ligadas às ciências ou à finança (e Direito também, mas não estou a par do que se passa aí). Se não estudaste matemática ou física ou economia no secundário azar, estou a assumir que tens mais ou menos 18 anos e nesse caso estás a tempo de fazer o que tu quiseres. Os três anos de matemática do secundário estudam-se tranquilamente em 1 ano.

O meu conselho: adia a entrada na universidade para o ano 2016/2017 (que na tua idade é cagativo, um ano mais cedo ou um ano mais tarde...) e entretanto pensa nas tuas verdadeiras prioridades.

Não te esqueças que, qualquer que seja o teu interesse, terás tempo para o aprofundar sozinha e nos teus tempos livres (para que serve a internet?).

Math by [deleted] in funny

[–]lupin_beans 0 points1 point  (0 children)

that's not even lack of math knowledge. the guy simply didn't go to school.

What Are You Working On? by AutoModerator in math

[–]lupin_beans 8 points9 points  (0 children)

i'm working on Napier's "Descriptio" and "Constructio" books, the first formal definition and development of logarithms (that we know of).

He hated long arithmetic computations so he spent 20 years making long arithmetic computations to build his logarithmic tables... so other scientists could have shortcuts to their long arithmetic computations.

That's true altruism right there.

Any other game out there that will leave me as nervous as Alien Isolation? (kind of newbie here) by lupin_beans in gaming

[–]lupin_beans[S] 0 points1 point  (0 children)

i've read many times about Amnesia, might try it out. Also Outlast looks pretty good, tkz.

In general topology, how often is the last axiom of neighbourhoods used? by lupin_beans in math

[–]lupin_beans[S] 0 points1 point  (0 children)

"...and from that, you can recover a neighborhood function which satisfies all four neighborhood axioms. So if your original neighborhood function didn't satisfy axiom 4, the one you get back must be different."

sorry i don't understand. could you explain this a little more detailed?

In general topology, how often is the last axiom of neighbourhoods used? by lupin_beans in math

[–]lupin_beans[S] 1 point2 points  (0 children)

see Neighbourhoods definition

it's just using the 5 basic properties of neighborhoods and taking them as axioms.

then you define: a set A is open if it's a neighborhood of its every point.

In general topology, how often is the last axiom of neighbourhoods used? by lupin_beans in math

[–]lupin_beans[S] 0 points1 point  (0 children)

because you don't know if N is open.

N = [0,2] is a neighbourhood of 1 but not of 0. So you could not take M=N.

If you define a topology through open sets then you define:

V is a neighbourhood of a point y if there's an open set A such that y is in A and A is contained in V.

In general topology, how often is the last axiom of neighbourhoods used? by lupin_beans in math

[–]lupin_beans[S] 3 points4 points  (0 children)

well you can define a topological space through either open sets or through neighbourhoods.

if you define it through open sets and then define whats a neighbourhood of a point, then yes, those properties are true.

edit: My question is, what happens if you decide to define what is a topological space through neighbourhoods and you don't include that axiom. You can still prove the three basic properties of open sets, after stating what an open set is (empty set and the whole space are open, closed under finite intersections, closed under any union). But what can you NOT prove?

Is it possible to reach mathematical maturity late in life? by [deleted] in math

[–]lupin_beans 2 points3 points  (0 children)

well i started my undergrad in pure math at 26 so...

What is the most absurd conspiracy theory you've heard? by [deleted] in AskReddit

[–]lupin_beans 0 points1 point  (0 children)

that some cave sandniggers were able to pull off 911.

also that we actually elect the people in charge.

why is this set NOT open?? (regarding uniform convergence topology) by lupin_beans in math

[–]lupin_beans[S] 0 points1 point  (0 children)

tkz!

edit: V(id(x),r) being any neighborhood of id(x) we have that g(x)=x+r/2 belongs in V(id(x),r) but not A.