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Nov
15
answered Why don't we need to check for associativity for a subgroup?
Nov
15
answered Extremely tough limit proof for f(x) and g(x)
Nov
10
comment Subtracting Quarters of Squares Equals Multiply?!
@Johanna Huh? Of course it's a good proof. They's not starting off by assuming equality, they're showing that the first equation is equivalent to the last.
Nov
9
comment A thought on Ancient Math
I think this question is too broad. Can you at least specify a period and country?
Nov
5
comment Why does convergence in law not worry about points of discontinuity?
I guess the trouble is that this is basically a subjective question... to me it's not intuitively clear that $X_n\to X$, since as you say, their laws disagree for certain events.
Nov
5
comment Why does convergence in law not worry about points of discontinuity?
@sanjab Perhaps I should have mentioned that I don't really understand the point of the example. Given that $F_n(0)=0$ for all $0$ but $F(0)=1$, I would find it more natural to just conclude that there isn't convergence in law. I don't see how the example is supposed to motivate changing the definition.
Nov
5
asked Why does convergence in law not worry about points of discontinuity?
Nov
4
comment $\pi$ normal to the base $10$
Well, because it's an immediate consequence of the definition of "normal". Are you sure that's the question you wanted to ask?
Nov
3
revised Silly technical question about polynomials in Lagrange's “résolution algébrique”
added 59 characters in body
Nov
3
comment Examples of mathematical discoveries which were kept as a secret
@DavidRicherby I got unreasonably excited by the term "Differential cryptanalysis", thinking it was going to be some form of cipher breaking based somehow on real analysis...
Nov
3
comment Silly technical question about polynomials in Lagrange's “résolution algébrique”
The proof of that fact is in the very last sentence of my answer, which I just detailed a bit more.
Nov
3
revised Silly technical question about polynomials in Lagrange's “résolution algébrique”
added 225 characters in body
Nov
2
revised Silly technical question about polynomials in Lagrange's “résolution algébrique”
edited body
Nov
2
answered Silly technical question about polynomials in Lagrange's “résolution algébrique”
Nov
2
comment What is the motivation/application of dual spaces and transposes?
Why is that a useful thing to define..?
Nov
1
comment What is the motivation/application of dual spaces and transposes?
I still don't understand why this is a useful concept, though.
Nov
1
comment What is the motivation/application of dual spaces and transposes?
What do you mean when you say that $L$ "determines" a map?
Nov
1
asked What is the motivation/application of dual spaces and transposes?
Oct
31
comment Minimizing $\mathbb E((X-m)^2)$
@NigelOvermars Do you have a reference for a proof?
Oct
31
asked Minimizing $\mathbb E((X-m)^2)$