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 Excavator Edited first post that was inactive for 6 months.

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20h ago
How to determine the N-smallest eigenvalues of a symmetric matrix using the Power Method? — EuYu 15.2k21239
1d ago
given $y = a + bx + cx^2$ fits three given points, find and solve the matrix equation for the unknowns $a,b$, and $c$ — user47805 337115
2d ago
If $\int_x^1f(t)dt\ge\frac{1-x^2}2$, $x\in[0,1]$, prove that $\int_0^1f(t)^2dt\ge1/3$. — Landscape 7,601223
may 15 at 23:32
Cayley tables for two non-isomorphic groups of order 4. — dktr.k1 1169
may 15 at 15:31
Simulating from a Multivariate Gaussian without Cholesky — imriss 233
may 14 at 15:41
The set of limit points of an unbounded set of ordinals is closed unbounded. — Bartek 1,803327
may 11 at 15:42
Help needed solving for bounded random walk expectation; problem involves strange (to me) Factorial/Gamma-function summation — O.L. 3,666630
may 11 at 14:47
Is value of $\pi = 4$? — exploringnet 2,255527
may 11 at 13:36
How to prove $\lim_{n \to +\infty} \sqrt{n}\int_0^\pi{\cos(\frac{t}{2})^n}dt>0$ — user1 689214
may 10 at 18:35
Can you explain what a real number is (also rational, decimal, integer, natural, cardinal, ordinal…) — Alistair Savage 1,31711
may 10 at 11:14
Showing $\exists~$ some $c$ such that $f(z)=cg(z)$ — ROBINSON 58013
may 9 at 11:11
Number of Ones Puzzle — CommonerG 662111
may 9 at 11:11
Check my workings: Prove the limit $\lim\limits_{x\to -2} (3x^2+4x-2)=2 $ using the $\epsilon,\delta$ definition. — mezhang 1,3841223
may 8 at 9:59
The system $x'=Ax$ is an attractor if and only if there is a positive quadratic form q such that $Dq(x)\cdot A(x)<0$ for all x — jkn 1,500219
may 7 at 17:22
Rotation around a vector with complex coordinates — NasuSama 36812
may 7 at 17:22
Non-core allocations in the 2-fold replica of an economy. — Martin Van der Linden 806
may 6 at 6:16
Solution to $1-f(x) = f(-x)$ — Ovi 1,190112
may 4 at 15:50
Infinite products - reference needed! — yup 1313
may 3 at 23:29
If $A$ is a subobject of $B$, and $B$ a subobject of $A$, are they isomorphic? — Stefan H. 1,7461215
may 3 at 15:51
Probabilistic calulation of the Fourier transform of the Cantor function — MichaelNgelo 1807
may 3 at 4:52
Find control point on piecewise quadratic Bézier curve — bubba 4,449222
may 3 at 4:07
What is a Markov Chain? — user73041 1208
may 2 at 19:38
What's so special about a homotopy $15$-sphere? — vadim123 6,936537
may 2 at 16:07
Division by $0$ — KronoS 293314
may 2 at 14:06
Why negative times negative = positive? — Jordan Gray 1036
may 1 at 22:32
Best and most efficient way to numerically compute $e$? — gangqinlaohu 591116
may 1 at 12:13
What's application of Bernstein Set? — Henno Brandsma 9,567919
apr 29 at 11:39
List Proper Primitive Groups of a certain degree by GAP — Alexander Konovalov 544119
apr 28 at 15:36
Is this space contractible? — ali 416
apr 24 at 18:58
For a graph $G$, if $m>\binom{n-1}{2}$, then $G$ is connected — Gautam Shenoy 2,309218
apr 23 at 15:01
A hyperbola as a constant difference of distances — qorilla 32
apr 22 at 19:04
Trace of a quadratic function, Convexity — jinawee 174114
apr 21 at 21:53
Proving inequality $\left( \frac {x} {y}\right) ^{x}\left( \frac {1-x} {1-y}\right) ^{1-x}\geqslant 1$ — jrand 776317
apr 21 at 14:23
How to prove Euler's formula: $e^{it}=\cos t +i\sin t$? — Manoj Pandey 552119
apr 21 at 4:01
Evaluate $\sum\limits_{k=1}^n k^2$ and $\sum\limits_{k=1}^n k(k+1)$ combinatorially — Stopwatch 1547
apr 19 at 19:42
Trig Question - $\arcsin(\sqrt{2}/2)$ and arc trig functions in general — moray95 42311
apr 19 at 2:16
Does a cubic polynomial with 3 real roots have Galois group C3? — Tyson Williams 1338
apr 17 at 7:24
The equation of a line reflected about another line — Dale M 39412
apr 15 at 17:06
Nowhere monotonic continuous function — Thomas Andrews 29.4k13168
apr 15 at 11:04
In-place inversion of large matrices — BЈовић 12610
apr 14 at 11:02
Prove: $\lim\limits_{r\to 0} \frac{1}{\pi \ r^2} \iint_{D_r(P)} \bf{F} \cdot \bf{n} \, dS=\bf{F}(P)$ — Dimitris Dallas 1,588116
apr 14 at 7:47
Multiple choice question: Let $f$ be an entire function such that $\lim_{|z|\rightarrow\infty}|f(z)|$ = $\infty$. — Sagarika 3598
apr 13 at 17:01
Evaluating $\int \limits_{a}^{\infty} \frac{\exp\left(-ax\right)}{\log(x)\left(c+x\right)^2}dx$ — jdh8 834
apr 11 at 14:34
Generalisation of Dominated Convergence Theorem — Lost1 1,738326
apr 11 at 0:53
Is there a simple test for uniform distributions? — BCS 1458
apr 10 at 14:02
Did the Appel/Haken graph colouring (four colour map) proof really not contribute to understanding? — mloskot 1034
apr 8 at 3:56
Example of finitely generated subgroups whose intersection is not finitely generated — PatrickR 305113
apr 6 at 22:33
Kernel Density Estimation — Tong Zhang 705317
apr 5 at 20:20
a problem in fractional calculus — Myke Arya 85017
apr 3 at 16:54
Is 1 a prime number? — gekkostate 1,298216
mar 31 at 16:20
Your favourite application of the Baire category theorem — user70283 72
mar 29 at 20:45
Why are addition and multiplication commutative, but not exponentiation? — MphLee 613221
mar 29 at 16:53
A nonmeasurable set on $\mathbb{R}^{\left[0,\infty\right)}$. — shilov 14211
mar 29 at 15:07
What is an inner product space? — julien 22.3k31356
mar 29 at 8:00
The square-root transform of a univalent function — Martin 3,668525
mar 28 at 17:23
Mathematics understood through poems? — Peter Shor 1,512514
mar 26 at 12:55
Coloring of graph such that every vertex in graph is either colored or shares an edge with a colored vertex — Lord_Farin 4,549831
mar 26 at 6:18
The set of symmetric matrices as a manifold — Bakhoda 431111
mar 25 at 12:55
Graph analysis and runtime. — DoctorBatmanGod 2,440231
mar 25 at 1:17
Proofs that every mathematician should know? — Glen O 2,884112
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