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 Yearling
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May
19
reviewed Approve Proving $f(t) = \sum\limits_{n=1}^{\infty}\frac{\cos(3^{n}t)}{3^{n\alpha}}$ is Lipschitz
May
11
comment Three planes in general position, one point in each, construct sections
How are the planes given? Can we find the intersection point of a line an a plane?
May
6
comment Simplest proof that some number is transcendental?
There are only countably many algebraic numbers...
May
6
answered Common tangent to a circle and ellipse
May
1
reviewed Approve Find the matrix $A$ such that the following is true:$ T_1(T_2(\mathbf{x})) = A\mathbf{x}$?
Apr
27
comment Geometric Construction Rhombus
Euclid Book 1 Proposition 2 shows how to construct the segment.
Apr
18
comment How to evaluate $\lim _{n\to \infty }\:\int _{1/(n+1)}^{1/n}\:\frac{\sin\left(x\right)}{x^3}\:dx$?
The correct answer is $1$.
Apr
18
answered How to evaluate $\lim _{n\to \infty }\:\int _{1/(n+1)}^{1/n}\:\frac{\sin\left(x\right)}{x^3}\:dx$?
Apr
18
comment Does every integer occur finitely many times and in what positions in Pascal's triangle?
You must restrict to $n > 1$ if you want the statement to be true...
Apr
18
comment Any hint about solving this monster determinant?
oeis.org/A052182
Apr
18
awarded  Yearling
Apr
15
comment Casting out of linearly dependent vectors from a set
$S = \{ \mathbf{0} \}$ is a linearly dependent set of vectors...
Apr
14
comment bound for $\cosh$
$\cosh(1) > 1.5430$. Recheck your calculations...
Apr
13
comment Show that if $P = NP$, then deciding whether a boolean formula is minimal is in $P$.
Are you defining 'minimal' to mean 'no clause may be deleted' or 'there is no shorter formula'?
Apr
12
comment Characterization of the $x$ such that $\sin(x)$ is rational?
I suppose it's cheating to say $x = \arcsin(r)$ for some rational number $r$. :)
Apr
11
comment Where exactly is $n\log n$ between $n$ and $n^2$?
Why the downvotes?
Apr
6
comment Is the Petersen Graph k-partite?
The chromatic number of the Petersen graph is $3$.
Feb
18
reviewed Approve Linear algebra: - Linear independence and span
Feb
4
comment Is the dual graph of a planar graph an isomorphism invariant?
Wouldn't the embeddings of $K_4$ be a counterexample?
Feb
4
comment Help Figuring Out Faulty Proof
The question's purpose was not to critique or request clarification, but to indicate a portion of the 'proof' that was wrong, thus hinting to an answer of the OP's homework question.