Mathematics

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Answer a question with score of 1 or more.
Awarded 75095 times.
Minimize $\frac{1}{2}\sum_{k=1}^m (x_{k+1}-x_{k})^2$
Awarded 50 mins ago
$\lim b_n-b=0$ is it correct to write down this?
Awarded 6 hours ago
Partition of $\mathbb R$ in convex subsets/badly ordered sets
Awarded 8 hours ago
Proof of the identity $\sum_{k=0}^{\min[p,q]}{p\choose k}{q\choose k}{n+k\choose p+q}={n\choose p}{n\choose q}$
Awarded 11 hours ago
3 other extensions of the Secretary Problem
Awarded 11 hours ago
(post deleted or otherwise unavailable)
Awarded 14 hours ago
Integral formula for Hopf map in local coordinates appears to vanish
Awarded 14 hours ago
Approximate $\coth(x)$ around $x = 0$
Awarded 15 hours ago
Convergence in distribution implies convergence in density
Awarded 16 hours ago
Understanding the Product as a Universal Arrow from the Diagonal Functor
Awarded 21 hours ago
How to know if an expression is a solution to a linear system?
Awarded 21 hours ago
Scheduling problem in chapter 3 of The Design of Approximation Algorithms by David P. Williamson and David B. Shmoys
Awarded 21 hours ago
Weight of a graph based on bridges connecting $L$ and $R$ sides
Awarded 21 hours ago
(post deleted or otherwise unavailable)
Awarded yesterday
Spectrum of self-adjoint operator is the support of the corresponding spectral measure
Awarded yesterday
Better form for integral$ \int_1^\infty 1/ (x \sqrt{x^2 - 1}) \exp(- a x)$
Awarded yesterday
Applications of Riemann Series Theorem
Awarded yesterday
Prove limit of n-th root
Awarded yesterday
Subgroups of $(\mathbb R, +)$ are either dense or cyclic.
Awarded yesterday
Diagonal matrix two-sided multiplication
Awarded yesterday
What is integral of $\int \frac{x+1}{2x^2+3x-4} dx$?
Awarded yesterday
what is the conditional probability that the card following it is the ace of spades?
Awarded yesterday
$x$ and $y$ are two real numbers such that: $1 \leq x^2 + y^2 - xy \leq 2$ Show that: $\frac{2}{9} \leq x^4 + y^4 \leq 8$
Awarded yesterday
When is the closure characterization of continuity ever really useful?
Awarded 2 days ago
Integration Techniques: Using Integration by Parts After Substitution
Awarded 2 days ago
How "big" is harmonic analysis?
Awarded 2 days ago
Showing $\int \limits_{a}^{x}f(t)(x-t)\,dt=\int \limits_{a}^{x}\left(\int \limits_{a}^{t}f(s)\,ds\right)dt$
Awarded 2 days ago
Can you explain to me why this proof by induction is not flawed? (Domain is graph theory, but that is secondary)
Awarded 2 days ago
MIT Statistic For Applications course Question 1
Awarded 2 days ago
Since AB = I = BA does this mean AB = BA?
Awarded 2 days ago
How to prove the statement: $\lim_{n\rightarrow\infty} z_n=0 \iff \lim_{n\rightarrow\infty}|z_n|=0$ for a sequence of complex numbers
Awarded 2 days ago
Problem with some specific indefinite integral solved with Wolfram Alpha online integrator
Awarded 2 days ago
How to get shape functions for three node 2d triangular element
Awarded 2 days ago
Is 1/3 included in the sequence 0.3, 0.33, 0.333,...?
Awarded 2 days ago
Can a regular grammar be ambiguous?
Awarded Apr 14 at 20:07
Proving $\lim_{n \to \infty} \frac{n}{n+2} \sum_{k=1}^{n} \frac{k}{k+3} = \infty$
Awarded Apr 14 at 17:51
(post deleted or otherwise unavailable)
Awarded Apr 14 at 14:17
(post deleted or otherwise unavailable)
Awarded Apr 14 at 10:52
algebraic fibre space induces algeraically closed extension of function fields
Awarded Apr 14 at 5:26
Are sets with no limit points not compact?
Awarded Apr 14 at 1:26
Prime divisors of numerators of partial sums of the harmonic series?
Awarded Apr 13 at 22:06
Utilizing a three (or two) variable linear system of equations, how can I solve a word problem involving combinations of items?
Awarded Apr 13 at 21:33
Concatenation of $f$-related vector fields/tangent vectors
Awarded Apr 13 at 20:36
Probability that at least 1 student is taking a language class solution
Awarded Apr 13 at 18:04
How to simplify $\frac{\cos(x)+\sqrt{x}\sin (x)}{2 \sqrt{x} \cos^2(x)} $ into $\frac{\cos(x) +2 x \sin(x)}{2 \sqrt{x} \cos^2(x)}$?
Awarded Apr 13 at 16:56
Proving that the Calkin-Wilf tree enumerates the rationals.
Awarded Apr 13 at 15:07
Round off 0.998 to 2 sig fig
Awarded Apr 13 at 14:26
How to remember the difference between "stars and bars" and multinomial coefficients?
Awarded Apr 13 at 13:10
When does order 4 conjugate subgroups only intersect at {𝑒}?
Awarded Apr 13 at 11:37
What is the general formula for calculating dot and cross products in spherical coordinates?
Awarded Apr 13 at 5:25
(post deleted or otherwise unavailable)
Awarded Apr 13 at 3:08
What are the mean and standard deviation of the convolution of two bit vectors?
Awarded Apr 13 at 1:56
Question on Lagrange series inversion proof
Awarded Apr 13 at 0:28
Prove Localization in CRing is Epimorphism
Awarded Apr 12 at 21:51
Holding points are absorbing
Awarded Apr 12 at 20:36
Let $A$ be a random matrix with i.i.d entries, what can we say about $Ax$?
Awarded Apr 12 at 18:06
A very interesting problem that from equations to geometry
Awarded Apr 12 at 17:56
Upper bound of depressed quartic
Awarded Apr 12 at 14:19
Proof for $\frac{x}{a} = \frac{y}{b} = \frac{z}{c} = \frac{\sqrt{x^2 + y^2 + z^2}}{\sqrt{a^2 + b^2 + c^2}} $
Awarded Apr 12 at 14:19
The rotation symmetry group and the reflection group: Is there a name for what they have in common?
Awarded Apr 12 at 13:25
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