Notable Question - Badge - Mathematics Stack Exchange

Notable Question

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Finding unknowns from HCF and LCM

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user307640

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Can eigenvectors of a symmetric circulant matrix be real?

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Alessandro

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Compute the ring of integers

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gebruiker

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Sum of dihedral angles in Tetrahedron

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JosephK

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Basic misunderstanding of the theorema egregium

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user162520

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Find the sum of all 5 digit numbers that can be formed using $0,0,1,1,2,3$

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Hari Ramakrishnan Sudhakar

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Is there notation for "some two of the three statements are true"?

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Mirzhan Irkegulov

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Probabilities of passing courses (conditional probability)

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Grade 12 Math Help

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Letter-Sending probability problem

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math_stat_enthusiast

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What is the meaning of Rank[A | b]? (Linear Algebra)

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J. Doe

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Bounds for $\zeta$ function on the $1$-line

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abhIta

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Why the magnitude of normal is always 1 when parameterised by arclength

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WeiShan Ng

3803 silver badges13 bronze badges

Convexity of supremum of convex functions

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Walls

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A proof that every set of natural numbers contains a minimal element

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Redundant Aunt

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If a Markov chain is irreducible and aperiodic with stationary distribution $\pi$, then $\lim_{n\rightarrow\infty}\mathbb P_i(X_n=j)=\pi_j$

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WhyMeasureTheory

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$\tan(x), \cot(x)$ function properties

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Dima Shifrin

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German tank problem, simple derivation [duplicate]

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angryavian

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Proof rank($A$) = rank of adjoint of A

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William Ho

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When does $x^T (xy^T) y = x^T (x^Ty) y$?

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Hal

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$a^b \mod m$ - cycles

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Aurelio

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Gaussian approximation of Poisson distribution

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zzzbbx

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On the group of signed permutations?

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Dani Hobbes

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Intuition behind arbitrage betting math

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user60519

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Finding all rational solutions to $y^2=x^3-432$

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McNuggets666

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Why can't we define arbitrarily large sets yet after defining these axioms? (Tao's Analysis I)

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Princess Mia

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How many distinct graphs for n identical nodes

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Rohit Pandey

7,6173 gold badges36 silver badges75 bronze badges

problems on Lebesgue integral

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Ivan3.14

7475 silver badges13 bronze badges

Compound geometric distribution

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john_jerome

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Greedy Algorithm, Fewest overlaps

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DaneLough

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Expected number of consecutive heads in 10 coin tosses

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Priyanshu

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Derivation on $C(X)$

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Ken.Wong

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Complement of figure-8 knot

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wilsonw

1,0549 silver badges23 bronze badges

Finding the measure of the generalized Cantor set.

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kam

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How close can $\sum_{k=1}^n \sqrt{k}$ be to an integer?

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marty cohen

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Finding $\int_0^{\frac{\pi}{2}}\arctan\left(\sin x\right)dx$

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gcy-rolle

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The topology of the Cantor Set

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IntegrateThis

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Bicolour Towers of Hanoi

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user4201961

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Aren't asteroids contradicting Euler's rotation theorem?

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hyperknot

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Compositions and Partitions

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Dreamer

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Inverse matrix to a bi-diagonal matrix

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timofiej8384

2372 silver badges11 bronze badges

How to find the optimal solution for Reve's puzzle (ie, the $4$-peg Tower of Hanoi)?

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Aracthor

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Poincaré-Hopf Theorem for manifolds with boundary in Milnor's book

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Lucas progrovic

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Finding centre of sphere inscribed in tetrahedron

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sequence

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How to prove that $\sum_{i<j}(X_i-X_j)^2=n\sum_{i=1}^{n}(X_i-\bar{X})^2$

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chole

1532 silver badges10 bronze badges

Random walking and the expected value

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brody

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What is the *real* representation theory of $SO(3)$?

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violeta

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Is there a simple geometric proof of why two simple harmonic oscillators draw a circle?

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crazygringo

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Annihilator of annihilator of subspace in dual space

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Alex

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Arranging finite balls of different color such that no balls of the same color are adjacent [duplicate]

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WaveX

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Every odd composite $=$ prime ${}+ 2x^2$

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Jeel Shah

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Why not just define equivalence relations on objects and morphisms for equivalent categories?

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AnotherPerson

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If $x^4 =x$ in a ring, then the ring is commutative. [duplicate]

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Mohan

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In search of a "perfect" test on (positive) series convergence

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Vim

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Proving the Existence of Triangle by Induction

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com

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Difference between finding normal vector to given surface using gradient and $r_u\times r_v$

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Esha

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Prove $ C^1[0,1]$ is not a Banach space with the sup-norm [duplicate]

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129492

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Positive integers which cannot be expressed as a difference of squares.

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hippickles

231 silver badge3 bronze badges

Finding the general solution to the Legendre's equation for n = 1

Awarded Nov 27 at 21:40

Lutterbach

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What is the most accurate explanation of Zeno's Achilles and the Tortoise paradox?

Awarded Nov 27 at 21:02

William

What is the intuition behind the definition of the kernel of a homomorphism

Awarded Nov 27 at 20:12

Charlie Parker

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