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Mathematics

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 Student
First question with score of 1 or more.
Awarded 271399 times.
MLE estimator and Borel-Cantelli
Awarded 3 hours ago
Does any infinite set of elements in a GCD Domain have a GCD?
Awarded 7 hours ago
First order non-linear ODE
Awarded 7 hours ago
Arrangements of 10 Balls Chosen from Red and Blue, Where Every Blue Ball Has a Blue Neighbor(need pure combinatorics solution)
Awarded 8 hours ago
Compact operators in Hilbert space
Awarded 9 hours ago
Why does the Generalized Collatz map ($3n+k$) with $k=3^x+2^x$ produce 1,023 cycles at $x=15$, but collapse to 1 cycle for $x \ge 21$?
Awarded 11 hours ago
Formula for number of unlabelled trees of n vertices [closed]
Awarded 15 hours ago
Counting disjoint $k$-tuples of lines in $\mathbb F_q^n$
Awarded 17 hours ago
Every k-fold cover of the real line by intervals can be decomposed into k distinct covers.
Awarded 18 hours ago
A question concerning the duality bracket of $W^{-1,p'}(\Omega)$ with $W_0^{1,p}(\Omega)$ relevant to $L^2(\Omega)$ inner product
Awarded 18 hours ago
Finite Fourier series for square-like wave
Awarded 23 hours ago
How are defined these double complexes in Bott Tu, Section 14?
Awarded 23 hours ago
Prove that $\sum_{k=1}^{n} \left\lfloor \log_{2}\!\left(\frac{2n}{2k-1}\right) \right\rfloor = n$ where $n$ is a natural number.
Awarded yesterday
Quotient group technicality
Awarded yesterday
Closed form for a symmetric sum of squared binomials
Awarded yesterday
Most general Logarithm of a matrix
Awarded yesterday
What is the value of $\tan (\theta) = 1/-1$?
Awarded yesterday
What is the order when doing process elimination on algebraic equation
Awarded yesterday
Dualizing Lie derivative with hodge star
Awarded yesterday
solving $\int \frac{\sqrt{\sin\theta}}{1+\sin^{2}\theta} \, d\theta$ [duplicate]
Awarded yesterday
Does the long exact sequence of a pair for a simplicial complex and a face delete split when the connecting maps are zero?
Awarded 2 days ago
Do I need to explicitly state $x \neq 0$ when an equation already implies that it cannot be zero? For example, $ \frac{1}{x} = x y^2$.
Awarded 2 days ago
Can a hemispherical surface be flattened if tearing is allowed but no stretching is allowed in the interiors
Awarded 2 days ago
Conditions to a linear map between tangent spaces being the differential of a isometry
Awarded 2 days ago
How can one construct, using only a straightedge and compass, a triangle ABC given side a, the altitude from B, and the median from C?
Awarded 2 days ago
Completeness of the Euclidean Postulates
Awarded 2 days ago
Is there an intuitive way to understand this formula for the magnitude of the projection of one vector onto another? [duplicate]
Awarded 2 days ago
Is this formula for cosine correct? (And is it significant) [closed]
Awarded 2 days ago
Consecutive equal sums [closed]
Awarded Nov 19 at 22:00
Ellipticity and eccentricity for non conical shapes
Awarded Nov 19 at 22:00
cycle index of symmetric group: sanity check
Awarded Nov 19 at 21:47
Contour Integration of $\csc^2(z)$
Awarded Nov 19 at 19:00
Does $\sqrt x\cdot\sqrt{x}=x$ or $\sqrt{x}\cdot\sqrt{x}=|x|$
Awarded Nov 19 at 18:45
What is wrong with my derivation of the surface area of a sphere?
Awarded Nov 19 at 16:00
How to comprehend a step of caculation from Ramanujan's Notebook?
Awarded Nov 19 at 15:22
Is the transfer principle useless?
Awarded Nov 19 at 14:21
Distribution of sum of product [closed]
Awarded Nov 19 at 13:53
Can one prove that two 2-forms with the same kernel are proportional to one another in this specific setting?
Awarded Nov 19 at 12:34
Connecting de Rham Cohomology to complex path integrals
Awarded Nov 19 at 10:18
Knowing if this equation is linear or not and how to express it as a linear equation?
Awarded Nov 19 at 9:17
Planted Matching in Hypergraphs
Awarded Nov 19 at 1:37
How many ways to arrange BOOKKEEPER where two E’s appear consecutively but not three.
Awarded Nov 19 at 1:07
Efficient way to find combinations of matrices that add up to a target matrix
Awarded Nov 18 at 19:27
Non-recursive, explicit rational sequence that converges to $\sqrt{2}$
Awarded Nov 18 at 18:11
Why is the expansion of numbers in other bases always in base $10$?
Awarded Nov 18 at 15:01
Can any superellipse $|x|^p+|y|^p=1$ arise as the envelope of a one-parameter family of curves?
Awarded Nov 18 at 13:40
How do I determine the domain of the inverse function if the domain of the original is given?
Awarded Nov 18 at 7:28
My strange sequence [closed]
Awarded Nov 18 at 6:16
Coloring a graph with K-colors
Awarded Nov 18 at 3:31
What topological properties are preserved when sandwiched?
Awarded Nov 18 at 2:36
Logic behind Modified Kaprekar Routine resulting in fixed point at $2538$? [closed]
Awarded Nov 17 at 23:43
Evaluate sum $\sum_{m=0}^{n-1}\frac{\binom{2m}{m}}{2^m}$
Awarded Nov 17 at 23:07
What is meant by forward invariance of a set? Can anyone give me a simple example to make me understand this. [closed]
Awarded Nov 17 at 21:48
Can an absolutely convergent infinite linear combination of an algebraically independent family be algebraic?
Awarded Nov 17 at 18:49
Inverse discrete Fourier transform and Fourier series : contradiction ? What's wrong in my proof?
Awarded Nov 17 at 18:32
Where to find Nardin's lecture notes on stable homotopy theory?
Awarded Nov 17 at 15:30
Why do these valleys in $LCM(P_n - 1, P_n + 1) \bmod n$ exist and are they random?
Awarded Nov 17 at 15:30
Prove that the chromatic polynomial of $n$-vertex graph has no real root larger than $n-1$
Awarded Nov 17 at 15:03
How many consecutive integers can have all their prime divisors in a set $P$ of size $k$? [closed]
Awarded Nov 17 at 14:27
Is there an algebraic solution for all extrema of $f(x)=\sin(x)\sin(cx)$?
Awarded Nov 17 at 13:53
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